Aluminum pellet, manufacturing method therefor, aluminum electrode, and aluminum-air battery system

Abstract

Provided is an aluminum-air battery system comprising: a battery unit including an aluminum electrode that emits electrons; and an aluminum pellet manufacturing unit which provides aluminum pellets manufactured from aluminum to the aluminum electrode.

Description

Aluminum pellets, their manufacturing method, aluminum electrodes, and aluminum-air battery systems

[0001] The present application relates to aluminum pellets, a method for producing the same, aluminum electrodes, and aluminum-air battery systems, and more particularly, to aluminum pellets, a method for producing the same, aluminum electrodes, and aluminum-air battery systems that are environmentally friendly and economical while maximizing energy density, capacity density, current efficiency, and / or fuel efficiency, and minimizing parasitic reactions of the electrodes.

[0002]

[0003] An aluminum-air battery may be a battery system that generates electricity through an electrochemical reaction between aluminum and oxygen in the air. More specifically, the aluminum-air battery may include an anode, a cathode, and an electrolyte. The ionization process of the aluminum metal, which is the anode, generates electrons. These electrons then travel along a conductor to the air electrode, which then reduces oxygen and water in the air, generating electricity. Accordingly, the aluminum-air battery may provide, for example, a high theoretical energy capacity of 2980 Ah / kg and an electromotive force of -1.66 V.

[0004] Conventionally, high-purity plate-shaped aluminum can be used as an electrode of an aluminum-air battery. For example, Korean Patent Publication No. 10-2247974 discloses an aluminum-air battery, which comprises a housing having an internal space, an air passage arranged inside the housing, an air electrode arranged to be in contact with the air passage, an electrolyte layer arranged under the air electrode, an aluminum metal electrode in contact with the electrolyte layer, a circulation unit for circulating the aluminum metal electrode in an upper portion of the housing, and a sediment removal unit arranged in the internal space of the housing to remove oxide sediment of the aluminum metal electrode, wherein the aluminum metal electrode is formed by rotatably connecting a plurality of aluminum plates to circulate the electrolyte inside and the outside of the housing, and a transfer rail is arranged at both ends of the aluminum metal electrode, and a guide groove is formed in the housing to guide the movement of the transfer rail, and the guide groove is characterized in that the width is wider than the thickness of the transfer rail in the rotational area of ​​the aluminum metal electrode.

[0005] However, conventional aluminum-air batteries may have limitations, such as the need to directly replace the plate-shaped aluminum electrodes used as the energy source. In other words, conventional aluminum-air batteries may be replaceable batteries. These replaceable batteries can be time-consuming and cost-intensive, and the replacement process can lead to malfunctions due to defects and battery separation.

[0006] Accordingly, a new electrode shape and charging method are required for aluminum-air batteries.

[0007] Meanwhile, aluminum-air batteries may require high-purity aluminum to achieve high energy density.

[0008] Accordingly, since high-purity aluminum is used in existing aluminum-air batteries, there may be a limitation in the high cost of energy production.

[0009] Accordingly, there is a need for a method to reduce energy production costs in aluminum-air batteries.

[0010]

[0011] The technical problem to be solved by the present application is to provide an aluminum pellet, a method for manufacturing the same, an aluminum electrode, and an aluminum-air battery system having maximized energy density, capacity density, current efficiency, and / or fuel efficiency.

[0012] Another technical problem to be solved by the present application is to provide an aluminum pellet with minimized parasitic reaction of the electrode, a method for manufacturing the same, an aluminum electrode, and an aluminum-air battery system.

[0013] Another technical challenge that the present application seeks to address is to provide an environmentally friendly and economical aluminum pellet, a method for producing the same, an aluminum electrode, and an aluminum-air battery system through recycling and resource circulation.

[0014] The technical problems that this application seeks to solve are not limited to those described above.

[0015]

[0016] To solve the above technical problems, the present application provides an aluminum-air battery system.

[0017] According to one embodiment, the aluminum-air battery system may include a battery unit including an aluminum electrode that emits electrons, and an aluminum pellet manufacturing unit that provides aluminum pellets manufactured from aluminum to the aluminum electrode.

[0018] According to one embodiment, the battery unit may further include an air electrode to which the emitted electrons are provided, and an electrolyte that transfers ions between the aluminum electrode and the air electrode.

[0019] In one embodiment, the electrolyte comprises an alkali salt, wherein the alkali salt may comprise sodium hydroxide (NaOH) of greater than 0.1 M and less than 8 M.

[0020] According to one embodiment, the electrolyte further includes an additive that minimizes parasitic reactions of the aluminum electrode, wherein the additive may include glycerol or polyvinyl alcohol (PVA).

[0021] In one embodiment, the additive may comprise greater than 10 vol% and less than 30 vol% glycerol.

[0022] According to one embodiment, the aluminum electrode includes a receiving space for receiving the aluminum pellets, and a housing that surrounds the aluminum pellets received in the receiving space and provides a reaction path between the aluminum pellets and the electrolyte, wherein the pellet manufacturing unit can provide the aluminum pellets to the receiving space before the aluminum pellets received in the receiving space are exhausted.

[0023] According to one embodiment, the pellet manufacturing unit includes an aluminum inlet through which aluminum is introduced, a forming module for manufacturing the aluminum pellets from the aluminum introduced into the aluminum inlet, and a pellet discharge port for providing the aluminum pellets manufactured in the forming module to the receiving space, wherein the surface area of ​​the aluminum pellets received in the receiving space through the pellet discharge port is 3.1415 cm per 0.1 g or more and 3 g or less. 2 Exceeds 22.2312 cm 2 The above aluminum pellets can be provided so as to be less than.

[0024]

[0025] To solve the above technical problem, the present application provides an aluminum electrode.

[0026] According to one embodiment, the aluminum electrode may include an aluminum electrode used in an aluminum-air battery, a receiving space for receiving aluminum pellets made from aluminum, and a housing that surrounds the aluminum pellets received in the receiving space and provides a reaction path between the aluminum pellets and the electrolyte.

[0027] In one embodiment, the housing comprises 3.1415 cm per 0.1 g to 3 g in the receiving space. 2 Exceeds 22.2312 cm 2 The aluminum pellets having a surface area of ​​less than 1000 µm can be accommodated.

[0028] According to one embodiment, the housing may include a mesh structure that provides a reaction path between the aluminum pellets and the electrolyte.

[0029]

[0030] To solve the above technical problem, the present application provides an aluminum pellet.

[0031] According to one embodiment, the aluminum pellets may have a diameter controlled to have a surface area according to the energy density of the aluminum-air battery, in the aluminum pellets used in the aluminum-air battery.

[0032] According to one embodiment, the aluminum pellets comprise aluminum and have a particle size of 3.1415 cm per 0.1 g or more and 3 g or less. 2 Exceeds 22.2312 cm 2 It may include a surface area of ​​less than 1 mm and a diameter of 1 mm or more and less than 10 mm.

[0033]

[0034] To solve the above technical problem, the present application provides a method for manufacturing aluminum pellets.

[0035] According to one embodiment, the method for manufacturing aluminum pellets includes a step of preparing aluminum, and a step of manufacturing aluminum pellets from the aluminum, in which the step of manufacturing the aluminum pellets may include controlling the diameter of the aluminum pellets so that the surface area of ​​the aluminum pellets is adjusted according to the energy density of the aluminum-air battery.

[0036] According to one embodiment, the aluminum pellets are controlled to have a diameter of 1 mm or more and less than 10 mm and 3.1415 cm 2 Exceeds 22.2312 cm 2 It can be adjusted to a surface area of ​​less than .

[0037] In one embodiment, the aluminum may comprise scrap aluminum.

[0038]

[0039] According to an embodiment of the present application, an aluminum-air battery system can be provided, including a battery unit including an aluminum electrode that emits electrons, and an aluminum pellet manufacturing unit that provides aluminum pellets manufactured from aluminum to the aluminum electrode.

[0040] According to an embodiment of the present application, the electrolyte of the battery unit may include sodium hydroxide in an amount of more than 0.1 M and less than 8 M, and glycerol in an amount of more than 10 vol% and less than 30 vol%.

[0041] Accordingly, the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit including the electrolyte, i.e., the aluminum-air battery-air battery, can be maximized, and parasitic reactions in the aluminum electrode can be minimized.

[0042] In addition, according to an embodiment of the present application, the diameter of the aluminum pellets manufactured to have a surface area according to the energy density of the battery unit, i.e., the aluminum-air battery-air battery, can be controlled. Specifically, for example, the diameter of the aluminum pellets can be controlled to be 1 mm or more and less than 10 mm. In addition, the surface area of ​​the aluminum pellets is 3.1415 cm 2 Exceeds 22.2312 cm 2 It can be adjusted to less than.

[0043] Accordingly, the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit, i.e., the aluminum-air battery-air battery, can be maximized, and parasitic reactions in the aluminum electrode can be minimized.

[0044] In addition, according to an embodiment of the present application, since waste aluminum can be used as a raw material for the aluminum pellets, the production cost for producing the aluminum pellets can be reduced.

[0045] Accordingly, the present invention can be environmentally friendly, economical, and energy efficient through recycling and resource circulation.

[0046]

[0047] FIG. 1 is a drawing for explaining an aluminum-air battery system according to an embodiment of the present application.

[0048] FIG. 2 is a drawing for explaining an aluminum electrode according to an embodiment of the present application.

[0049] FIG. 3 is a drawing for explaining a method for manufacturing aluminum pellets according to an embodiment of the present application.

[0050] Figure 4 is a graph measuring the performance of an aluminum-air battery according to experimental examples 1-1 to 1-5 of the present application.

[0051] Figure 5 is a graph measuring the performance of an aluminum-air battery according to experimental examples 1-2 to 1-5 of the present application.

[0052] Figure 6 is a graph measuring the performance of an aluminum-air battery according to experimental examples 2-2 to 2-5 of the present application.

[0053] Figure 7 is a graph measuring the performance of an aluminum-air battery according to experimental examples 3-1 to 3-3 of the present application.

[0054] Figure 8 is a graph measuring the performance of an aluminum-air battery according to experimental examples 4-1 to 4-3 of the present application.

[0055] Figure 9 is a graph measuring the performance of an aluminum-air battery according to experimental examples 5-1 to 5-6 of the present application.

[0056] Figure 10 is a graph measuring the performance of an aluminum-air battery according to experimental examples 8-1 to 8-4 of the present application.

[0057] Figure 11 is a graph showing the energy density of an aluminum-air battery according to Experimental Example 8-2 of the present application and an aluminum-air battery manufactured from another aluminum material.

[0058] Figure 12 is a graph measuring the performance of an aluminum-air battery according to experimental examples 9-1 and 9-2 of the present application.

[0059] Figure 13 is a drawing comparing the manufacturing process and power generation cost economy of aluminum of an aluminum-air battery system according to an embodiment and experimental example of the present application and conventional aluminum.

[0060]

[0061] Hereinafter, preferred embodiments of the present application will be described in detail with reference to the attached drawings. However, the technical concepts of the present application are not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the concepts of the present application to those skilled in the art.

[0062] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. Furthermore, in the drawings, the thicknesses of films and regions are exaggerated for the purpose of effectively explaining the technical content.

[0063] Additionally, although terms such as first, second, and third have been used to describe various components in various embodiments of this specification, these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiments. Additionally, the term "and / or" has been used herein to mean including at least one of the components listed before and after.

[0064] In the specification, singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "comprise" or "have" are intended to specify the presence of a feature, number, step, component, or combination thereof described in the specification, and should not be construed as excluding the presence or addition of one or more other features, numbers, steps, components, or combinations thereof. In addition, the term "connection" is used in the present specification to mean both indirectly connecting multiple components and directly connecting them.

[0065] In addition, when describing the present application below, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present application, the detailed description will be omitted.

[0066]

[0067] FIG. 1 is a drawing for explaining an aluminum-air battery system according to an embodiment of the present application, and FIG. 2 is a drawing for explaining an aluminum electrode according to an embodiment of the present application.

[0068] Referring to FIG. 1, the aluminum-air battery system (1000) may include a battery unit (100) including an aluminum electrode (110) that emits electrons, and an aluminum pellet manufacturing unit (200) that provides aluminum pellets (250) manufactured from aluminum to the aluminum electrode (110).

[0069] According to one embodiment, the battery unit (100) may be an aluminum-air battery, and may further include an air electrode (120) to which the emitted electrons are provided, and an electrolyte (130) that transfers ions between the aluminum electrode (110) and the air electrode (120).

[0070] According to one embodiment, the electrolyte (130) may include an alkaline salt. The alkaline salt may be, for example, sodium hydroxide (NaOH). In addition, the electrolyte (130) may further include an additive that minimizes parasitic reactions of the aluminum electrode (110). The additive may be, for example, glycerol or polyvinyl alcohol (PVA).

[0071] According to an embodiment of the present application, the amount of the alkali salt and the additive of the electrolyte (130) can be controlled. Specifically, for example, the electrolyte (130) may include sodium hydroxide of more than 0.1 M and less than 8 M. More specifically, for example, the electrolyte (130) may include sodium hydroxide of more than 0.1 M and less than 1 M. In addition, the electrolyte (130) may include glycerol of more than 10 vol% and less than 30 vol%. More specifically, for example, the electrolyte (130) may include 0.5 M sodium hydroxide and 20 vol% glycerol.

[0072] Accordingly, according to an embodiment of the present application, in the battery unit (100), i.e., the aluminum-air battery, which includes the electrolyte (130) in which the amounts of the alkali salt and the additive are controlled, the parasitic reaction of the aluminum electrode (110) can be minimized and a high energy density can be formed. Specifically, for example, the battery unit (100) can provide a high energy density of 190 Wh / kg or more and 200 Wh / kg or less. More specifically, for example, the battery unit (100) can provide a high energy density of 190.85 Wh / kg.

[0073] Furthermore, the battery unit (100) in which the amounts of the alkali salt and the additive are controlled can provide high capacity density, high current efficiency, and / or high fuel efficiency because it includes the electrolyte (130). Specifically, for example, the battery unit (100) can provide high capacity density of 390 mAh / g or more to 400 mAh / g or less, high current efficiency of 13% or more to 14% or less, and / or high fuel efficiency of 2% or more to 3% or less. More specifically, for example, the battery unit (100) can provide high capacity density of 397.61 mAh / g, high current efficiency of 13.34%, and / or high fuel efficiency of 2.36%.

[0074] Unlike the embodiments of the present application, in the case of an aluminum-air battery including an electrolyte containing 0.1 M or less or 1 M or more of the alkali salt, the energy density, capacity density, current efficiency, and / or fuel efficiency may be reduced.

[0075] In addition, unlike the embodiments of the present application, in the case of an aluminum-air battery containing 10 vol% of the additive, a parasitic reaction may be activated in the aluminum electrode. Or, unlike the embodiments of the present application, in the case of an aluminum-air battery containing 30 vol% or more of the additive, the energy density, capacity density, current efficiency, and / or fuel efficiency may be reduced.

[0076] However, according to an embodiment of the present application, the electrolyte (130) may include sodium hydroxide in an amount of more than 0.1 M to less than 8 M, more specifically, more than 0.1 M to less than 1 M, and glycerol in an amount of more than 10 vol% to less than 30 vol%.

[0077] Accordingly, the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100) including the electrolyte (130), i.e., the aluminum-air battery-air battery, can be maximized, and parasitic reactions in the aluminum electrode (110) can be minimized.

[0078] For another example, the electrolyte (130) may include sodium hydroxide in an amount of greater than 0.1 M and less than 8 M. In addition, the electrolyte (130) may include polyvinyl alcohol (PVA) in an amount of greater than 100 ppm and less than 2000 ppm. More specifically, for example, the electrolyte (130) may include 4 M sodium hydroxide and 1000 ppm glycerol.

[0079] Accordingly, not only can the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100) including the electrolyte (130) be maximized, but the parasitic reaction of the aluminum electrode (110) can be minimized.

[0080] According to one embodiment, the aluminum electrode (110) may include, as shown in FIG. 2, a receiving space (111) in which the aluminum pellet (250) is received, and a housing (112) that surrounds the aluminum pellet (250) received in the receiving space (111) and provides a reaction path between the aluminum pellet (250) and the electrolyte (130).

[0081] According to one embodiment, the housing (112) may include a mesh structure, as illustrated in FIG. 2. More specifically, the housing (112) may include a mesh structure surrounding the aluminum pellet (250).

[0082] Due to this, the electrolyte (130) can flow into the receiving space (111) through the mesh structure of the housing (112) and easily come into contact with the aluminum pellet (250) of the receiving space (111).

[0083] Accordingly, a reaction can be activated in the battery unit (100), and the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100) can be maximized.

[0084] According to one embodiment, the air electrode (120) may have a porous structure. For example, the air electrode (120) may be formed of a porous carbon material. More specifically, for example, the air electrode (120) may be formed of at least one selected from the group consisting of activated carbon, carbon nanotubes, and graphene.

[0085] Accordingly, the air electrode (120) can easily react with oxygen in the air.

[0086] According to one embodiment, the air electrode (120) may include at least one catalyst selected from the group of noble metals including platinum (Pt) and silver (Ag) or the group of non-noble metals including manganese oxide (MnO2), cobalt oxide (Co3O4), and nitrogen-doped carbon (N-doped Carbon).

[0087] Accordingly, the air electrode (120) can promote a reaction with oxygen.

[0088] According to one embodiment, the air electrode (120) may include a current collector, for example, at least one current collector selected from the group including nickel mesh and stainless steel mesh or the group including carbon cloth.

[0089] Accordingly, the mechanical stability of the air electrode (120) can be improved.

[0090] Referring again to FIG. 1, the pellet manufacturing unit (200) may include an aluminum inlet (210) through which aluminum is introduced, a forming module (220) for manufacturing the aluminum pellet (250) from the aluminum introduced into the aluminum inlet (210), and a pellet discharge port (230) for providing the aluminum pellet (250) manufactured in the forming module (220) to the receiving space (111).

[0091] According to one embodiment, the aluminum flowing into the aluminum inlet (210) may be, for example, aluminum obtained from an aluminum component for an electric vehicle. More specifically, for example, the aluminum may be A6063, A6082, A6N01, A6014, and / or A6061. For another example, the aluminum may be an aluminum can. For another example, the aluminum may be a byproduct generated during the driving process of the battery unit (100). More specifically, for example, the aluminum may be aluminum oxide (Al2O3) and / or aluminum hydroxide (Al(OH)3) generated during the driving process of the battery unit (100).

[0092] That is, according to the embodiment of the present application, since waste aluminum can be used as a raw material for the aluminum pellet (250), the production cost for producing the aluminum pellet (250) can be reduced.

[0093] Accordingly, the present invention can be environmentally friendly, economical, and energy efficient through recycling and resource circulation.

[0094] According to an embodiment of the present application, the aluminum pellet (250) manufactured from the aluminum may have a purity of 99.5% or more and 99.99% or less.

[0095] In other words, according to the embodiment of the present application, high-purity aluminum pellets (250) can be manufactured from the aluminum.

[0096] According to one embodiment, the forming module (220) can form the aluminum introduced through the aluminum inlet (210). More specifically, for example, the forming module (220) can include a device for melting and casting the aluminum. The device for melting and casting can follow a device typically used for melting and casting metals. Without being limited thereto, the forming module (220) can also follow a typical metal pellet forming device for manufacturing the aluminum in the form of pellets.

[0097] According to one embodiment, the forming module (220) can control the diameter of the aluminum pellet (250) manufactured to have a surface area according to the energy density of the battery part (100), i.e., the aluminum-air battery-air battery, in forming the aluminum pellet (250). Specifically, for example, the forming module (220) can control the diameter of the aluminum pellet (250) to be 1 mm or more and less than 10 mm. In addition, the forming module (220) can control the surface area of ​​the aluminum pellet (250) to be 3.1415 cm 2 Exceeds 22.2312 cm 2 can be adjusted to less than 10 ... 2 Exceeding 11.0528 cm 2 can be adjusted to less than 1000 mm. More specifically, for example, the forming module (220) can control the diameter of the aluminum pellet (250) to 6 mm and the surface area to 7.9128 cm. 2 can be adjusted.

[0098] Accordingly, not only can the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100), i.e., the aluminum-air battery-air battery, be maximized, but parasitic reactions in the aluminum electrode (110) can be minimized.

[0099] Unlike the embodiment of the present application, a diameter of 9 mm or more and 5.0868 cm 2 For aluminum-air batteries containing pellets having a surface area of ​​less than 4 mm, the energy density, capacity density, current efficiency, and / or fuel efficiency may be reduced. Alternatively, unlike the embodiments of the present application, the aluminum-air batteries may have a diameter of less than 4 mm and a surface area of ​​less than 11.0528 cm. 2 For an aluminum-air battery containing pellets having a surface area above, parasitic reactions can be activated at the aluminum electrode.

[0100] However, according to an embodiment of the present application, the diameter of the aluminum pellet (250) is controlled to be 1 mm or more and less than 10 mm, more specifically 4 mm or more and less than 9 mm, and the surface area is 3.1415 cm 2 Exceeds 22.2312 cm 2 less than, more specifically, 5.0868 cm 2 Exceeding 11.0528 cm 2 It can be adjusted to less than.

[0101] Accordingly, the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100) including the aluminum pellet (250), i.e., the aluminum-air battery-air battery, can be maximized, and parasitic reactions in the aluminum electrode (110) can be minimized.

[0102] According to one embodiment, the pellet manufacturing unit (200) can provide the aluminum pellets (250) to the receiving space (111) through the pellet discharge port (230) before the aluminum pellets (250) received in the receiving space (111) are exhausted. More specifically, the pellet manufacturing unit (200) can provide the aluminum pellets (250) received in the receiving space (111) through the pellet discharge port (230) so that the surface area of ​​the aluminum pellets (250) received in the receiving space (111) is 3.1415 cm per 0.1 g or more and 3 g or less. 2 Exceeds 22.2312 cm 2 The above aluminum pellets (250) can be provided so as to be less than.

[0103] According to one embodiment, the pellet manufacturing unit (200) can calculate a weight corresponding to the surface area of ​​the aluminum pellet (250). In addition, the housing (112) can include a weight detection sensor that measures the weight of the aluminum pellet (250). In addition, the pellet manufacturing unit (200) and the weight detection sensor can be electrically connected.

[0104] Accordingly, the weight of the aluminum pellet (250) measured in the housing (112) is 3.1415 cm per the surface area range, that is, 0.1 g or more to 3 g or less. 2 Exceeds 22.2312 cm 2 If the range corresponding to the less than is exceeded, the pellet manufacturing unit (200) can provide the aluminum pellet (250) to the receiving space (111).

[0105] Due to this, in the receiving space (111) of the housing (112), 3.1415 cm per 0.1 g or more and 3 g or less 2 Exceeds 22.2312 cm 2 The aluminum pellets (250) having a surface area of ​​less than 1000 µm can be uniformly accommodated.

[0106] Accordingly, the energy density, capacity density, current efficiency, and / or fuel efficiency of the battery unit (100) can be uniform.

[0107]

[0108] Below, a method for manufacturing aluminum pellets according to an embodiment of the present application is described.

[0109]

[0110] FIG. 3 is a drawing for explaining a method for manufacturing aluminum pellets according to an embodiment of the present application.

[0111] Referring to FIG. 3, aluminum may be prepared. The aluminum may be, for example, aluminum obtained from aluminum parts for electric vehicles. More specifically, the aluminum may be, for example, A6063, A6082, A6N01, A6014, and / or A6061. As another example, the aluminum may be an aluminum can. As another example, the aluminum may be a byproduct generated during the driving process of the battery unit (100). More specifically, the aluminum may be, for example, aluminum oxide (Al2O3) and / or aluminum hydroxide (Al(OH)3) generated during the driving process of the battery unit (100).

[0112] That is, according to the embodiment of the present application, since the aluminum is used as a raw material for the aluminum pellet (250), the production cost for producing the aluminum pellet (250) can be reduced.

[0113] Accordingly, the present invention can be eco-friendly, economical, and energy-efficient.

[0114] According to an embodiment of the present application, the aluminum pellet (250) manufactured from the aluminum may have a purity of 99.5% or more and 99.99% or less.

[0115] In other words, according to an embodiment of the present application, high-purity aluminum pellets (250) can be provided from the aluminum.

[0116] Continuing with reference to FIG. 3, the aluminum pellet (250) can be manufactured from the aluminum. More specifically, the aluminum can be melted and cast. However, the invention is not limited thereto, and the aluminum can be manufactured using any conventional metal pellet forming method.

[0117] According to one embodiment, the diameter of the aluminum pellet (250) can be controlled so that the surface area of ​​the aluminum pellet (250) is adjusted according to the energy density of the battery unit (100), i.e., the aluminum-air battery. More specifically, the aluminum pellet (250) is controlled to have a diameter of 1 mm or more and less than 10 mm, and 3.1415 cm 2 Exceeds 22.2312 cm 2 It can be adjusted to a surface area of ​​less than .

[0118] Accordingly, when the aluminum pellet (250) is provided to the battery unit (100), i.e., the aluminum-air battery-air battery, not only is the energy density, capacity density, current efficiency, and / or fuel efficiency of the aluminum-air battery maximized, but parasitic reactions in the aluminum electrode (110) can be minimized.

[0119]

[0120] Hereinafter, specific experimental examples and characteristic evaluation results according to embodiments of the present application are described.

[0121]

[0122] Manufacturing of aluminum-air battery (ex1-1) according to Experimental Example 1-1

[0123] The electrolyte (130) was prepared by dissolving 0.1 M sodium hydroxide (NaOH) and 20 vol% glycerol in deionized water (DI water) having an electrical resistance of 15 MΩ or more.

[0124] The housing (112) was manufactured with stainless steel mesh so that the receiving space (111) capable of receiving the aluminum pellet (250) was formed inside.

[0125] Aluminum was collected, melted and cast to produce aluminum pellets (250) having a diameter of 2 mm and a purity of 99.5%, and provided into the receiving space (111) inside the housing (112), thereby producing the aluminum electrode (110).

[0126] The air electrode (120) was prepared based on polytetrafluoroethylene (PTFE) and including a manganese oxide (MnO2) catalyst and a nickel mesh (Ni mesh) current collector.

[0127] The aluminum electrode (110) and the air electrode (120) were placed in a tank so as to be in contact with the electrolyte (130) and electrically connected to manufacture an aluminum-air battery (ex1-1) according to Experimental Example 1-1.

[0128]

[0129] Manufacturing of aluminum-air battery (ex1-2) according to Experimental Example 1-2

[0130] In the experimental example 1-1 described above, 0.5 M sodium hydroxide was dissolved to manufacture an aluminum-air battery (ex1-2) according to experimental example 1-2.

[0131]

[0132] Manufacturing of aluminum-air battery (ex1-3) according to Experimental Example 1-3

[0133] In the above-described Experimental Example 1-1, 1 M sodium hydroxide was dissolved to manufacture an aluminum-air battery (ex1-3) according to Experimental Example 1-3.

[0134]

[0135] Manufacturing of aluminum-air battery (ex1-4) according to Experimental Example 1-4

[0136] In the experimental example 1-1 described above, 2 M sodium hydroxide was dissolved to manufacture an aluminum-air battery (ex1-4) according to experimental example 1-4.

[0137]

[0138] Manufacturing of aluminum-air battery (ex1-5) according to Experimental Example 1-5

[0139] In the experimental example 1-1 described above, 4 M sodium hydroxide was dissolved to manufacture an aluminum-air battery (ex1-5) according to experimental example 1-5.

[0140]

[0141] The experimental examples 1-1 to 1-5 described above can be summarized as shown in Table 1 below.

[0142] Aluminum pellet (250) Purity: 99.5% Ball fraction Sodium oxide (M) Glycerol (vol%) Experimental example 1-1 (ex1-1) 0.120 Experimental example 1-2 (ex1-2) 0.520 Experimental example 1-3 (ex1-3) 120 Experimental example 1-4 (ex1-4) 220 Experimental example 1-5 (ex1-5) 420

[0143] FIG. 4 is a graph measuring the performance of an aluminum-air battery according to Experimental Examples 1-1 to 1-5 of the present application, and FIG. 5 is a graph measuring the performance of an aluminum-air battery according to Experimental Examples 1-2 to 1-5 of the present application.

[0144] The performance of the aluminum-air battery according to the experimental examples 1-1 to 1-5 with reference to FIGS. 4 and 5 can be summarized as shown in Table 2 below.

[0145] Change in the old spray gun (g)Average discharge voltageCurrentCapacity densityCurrent efficiencyEnergy densityFuel efficiencyBeforeAfterresult(V)(mA)(mAh / g)(%)(Wh / kg)(%)Experimental example 1-1(ex1-1)1.9947---0.3010.00---2.98-0.04Experimental example 1-2(ex1-2)1.99871.94840.05030.4810.00397.6113.34190.852.36Experimental example 1-3(ex1-3)2.00781.75890.24890.9710.0080.352.7077.940.96Experimental example 1-4(ex1-4)2.01011.6450.36510.9910.0054.781.8454.230.67Experimental Example 1-5(ex1-5)1.99640.61781.37860.9710.0014.510.4914.070.17

[0146] Referring to FIG. 4, FIG. 5, and Table 2, it can be confirmed that the aluminum-air battery (ex1-2) according to Experimental Example 1-2 has the highest energy density, capacity density, current efficiency, and fuel efficiency.

[0147] Accordingly, it can be proven that the aluminum-air battery (100) including the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol when the purity of the aluminum pellet (250) is 99.5% has maximized energy density, capacity density, current efficiency, and fuel efficiency.

[0148] Additionally, it can be inferred that parasitic reactions at the aluminum electrode (110) are minimized through the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol.

[0149]

[0150] Manufacturing of aluminum-air battery (ex2-2) according to Experimental Example 2-2

[0151] In the above-described experimental example 1-2, the aluminum pellet (250) having a purity of 99.99% was manufactured, and an aluminum-air battery (ex2-2) according to experimental example 2-2 was manufactured.

[0152]

[0153] Manufacturing of aluminum-air battery (ex2-3) according to Experimental Example 2-3

[0154] In the above-described experimental example 1-3, the aluminum pellet (250) having a purity of 99.99% was manufactured, and an aluminum-air battery (ex2-3) according to experimental example 2-3 was manufactured.

[0155]

[0156] Manufacturing of aluminum-air battery (ex2-4) according to Experimental Example 2-4

[0157] In the above-described experimental example 1-4, the aluminum pellet (250) having a purity of 99.99% was manufactured, and an aluminum-air battery (ex2-4) according to experimental example 2-4 was manufactured.

[0158]

[0159] Manufacturing of aluminum-air battery (ex2-5) according to Experimental Example 2-3

[0160] In the above-described experimental example 1-5, the aluminum pellet (250) having a purity of 99.99% was manufactured, and an aluminum-air battery (ex2-5) according to experimental example 2-5 was manufactured.

[0161]

[0162] The experimental examples 2-2 to 2-5 described above can be summarized as shown in Table 3 below.

[0163] Aluminum pellet (250) Purity: 99.99% Ball fraction Sodium oxide (M) Glycerol (vol%) Experimental example 2-2 (ex2-2) 0.520 Experimental example 2-3 (ex2-3) 120 Experimental example 2-4 (ex2-4) 220 Experimental example 2-5 (ex2-5) 420

[0164] Figure 6 is a graph measuring the performance of an aluminum-air battery according to experimental examples 2-2 to 2-5 of the present application.

[0165] The performance of the aluminum-air battery according to the experimental examples 2-2 to 2-5 with reference to Fig. 6 can be summarized as shown in Table 4 below.

[0166] Change in the old spray gun (g)Average discharge voltageCurrentCapacity densityCurrent efficiencyEnergy densityFuel efficiencyBeforeAfterresult(V)(mA)(mAh / g)(%)(Wh / kg)(%)Experimental example 2-2(ex2-2)1.9971.93430.06270.9210.00318.9810.70294.973.64Experimental example 2-3(ex2-3)1.9951.85790.13711.0210.00145.884.90148.941.84Experimental example 2-4(ex2-4)2.00451.77180.23271.0210.0085.952.8887.911.09Experimental example 2-5(ex2-5)1.99561.31980.67581.0610.0029.590.9931.360.39

[0167] Referring to Fig. 6 and Table 4, it can be confirmed that the aluminum-air battery (ex2-2) according to Experimental Example 2-2 has the highest energy density, capacity density, current efficiency, and fuel efficiency.

[0168] Accordingly, it can be proven that the aluminum-air battery (100) including the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol when the purity of the aluminum pellet (250) is 99.99% has maximized energy density, capacity density, current efficiency, and fuel efficiency.

[0169] Additionally, it can be inferred that parasitic reactions at the aluminum electrode (110) are minimized through the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol.

[0170]

[0171] Manufacturing of aluminum-air battery (ex3-1) according to Experimental Example 3-1

[0172] In the above-described experimental example 1-2, the aluminum pellet (250) having a diameter of 2 mm was manufactured, and an aluminum-air battery (ex3-1) according to experimental example 3-1 was manufactured.

[0173]

[0174] Manufacturing of aluminum-air battery (ex3-2) according to Experimental Example 3-2

[0175] In the above-described experimental example 1-2, the aluminum pellet (250) having a diameter of 3 mm was manufactured, and an aluminum-air battery (ex3-2) according to experimental example 3-2 was manufactured.

[0176]

[0177] Manufacturing of aluminum-air battery (ex3-3) according to Experimental Example 3-3

[0178] In the above-described experimental example 1-2, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and an aluminum-air battery (ex3-3) according to experimental example 3-3 was manufactured.

[0179]

[0180] The experimental examples 3-1 to 3-3 described above can be summarized as shown in Table 5 below.

[0181] Aluminum pellet (250) Purity: 99.5% Diameter of aluminum pellet (250) (mm) Experimental example 3-1 (ex3-1) 2 Experimental example 3-2 (ex3-2) 3 Experimental example 3-3 (ex3-3) 4 Aluminum plate -

[0182] Figure 7 is a graph measuring the performance of an aluminum-air battery according to experimental examples 3-1 to 3-3 of the present application.

[0183] The performance of the aluminum-air battery according to the experimental examples 3-1 to 3-3 with reference to Fig. 7 can be summarized as shown in Table 6 below.

[0184] Change in the old spray gun (g)Average discharge voltageCurrentCapacity densityCurrent efficiencyEnergy densityFuel efficiencyBeforeAfterresult(V)(mA)(mAh / g)(%)(Wh / kg)(%)Experimental example 3-1(ex3-1)2.00781.75890.24890.9710.0080.352.7077.840.96Experimental example 3-2(ex3-2)2.0121.93180.08020.9510.00249.388.37235.782.91Experimental example 3-3(ex3-3)2.0121.97940.03260.8510.00613.5020.59520.556.43Aluminum Plate 7.65547.60490.05051.2110.00396.0413.29481.165.94

[0185] Referring to Fig. 7 and Table 6, it can be confirmed that the aluminum-air battery (ex3-3) according to Experimental Example 3-3 has the highest energy density, capacity density, current efficiency, and fuel efficiency.

[0186] Accordingly, it can be proven that the aluminum-air battery (100) including the aluminum pellets (250) having a purity of 99.5% and a diameter of 4 mm or more has maximized energy density, capacity density, current efficiency, and fuel efficiency.

[0187] Additionally, it can be inferred that parasitic reactions in the aluminum electrode (110) are minimized through the aluminum pellet (250) having a diameter of 4 mm or more.

[0188]

[0189] Manufacturing of aluminum-air battery (ex4-1) according to Experimental Example 4-1

[0190] In the above-described experimental example 2-2, the aluminum pellet (250) having a diameter of 2 mm was manufactured, and an aluminum-air battery (ex4-1) according to experimental example 4-1 was manufactured.

[0191]

[0192] Manufacturing of aluminum-air battery (ex4-2) according to Experimental Example 4-2

[0193] In the above-described experimental example 2-2, the aluminum pellet (250) having a diameter of 3 mm was manufactured, and an aluminum-air battery (ex4-2) according to experimental example 4-2 was manufactured.

[0194]

[0195] Manufacturing of aluminum-air battery (ex4-3) according to Experimental Example 4-3

[0196] In the above-described experimental example 2-2, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and an aluminum-air battery (ex4-3) according to experimental example 4-3 was manufactured.

[0197]

[0198] The experimental examples 4-1 to 4-4 described above can be summarized as shown in Table 7 below.

[0199] Aluminum pellet (250) Purity: 99.99% Aluminum pellet (250) Diameter (mm) Experimental example 4-1 (ex4-1) 2 Experimental example 4-2 (ex4-2) 3 Experimental example 4-3 (ex4-3) 4 Aluminum plate -

[0200] Figure 8 is a graph measuring the performance of an aluminum-air battery according to experimental examples 4-1 to 4-3 of the present application.

[0201] The performance of the aluminum-air battery according to the experimental examples 4-1 to 4-3 with reference to Fig. 8 can be summarized as shown in Table 8 below.

[0202] Change in the old spray gun (g)Average discharge voltageCurrentCapacity densityCurrent efficiencyEnergy densityFuel efficiencyBeforeAfterresult(V)(mA)(mAh / g)(%)(Wh / kg)(%)Experimental example 4-1(ex4-1)1.9971.93430.06270.9210.00318.9810.70294.973.64Experimental example 4-2(ex4-2)2.0221.97620.04580.9610.00436.6814.65417.415.15Experimental example 4-3(ex4-3)2.04062.01410.02650.9010.00754.7225.33680.018.40Aluminum plate1.95761.93120.02641.3210.00757.5825.421001.8412.37

[0203] Referring to Fig. 8 and Table 8, it can be confirmed that the aluminum-air battery (ex4-3) according to Experimental Example 4-3 has the highest energy density, capacity density, current efficiency, and fuel efficiency.

[0204] Accordingly, it can be proven that the aluminum-air battery (100) including the aluminum pellets (250) having a purity of 99.99% and a diameter of 4 mm or more has maximized energy density, capacity density, current efficiency, and fuel efficiency.

[0205] Additionally, it can be inferred that parasitic reactions in the aluminum electrode (110) are minimized through the aluminum pellet (250) having a diameter of 4 mm or more.

[0206]

[0207] Manufacturing of aluminum-air battery (ex5-1) according to Experimental Example 5-1

[0208] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2To this end, 177 of the above aluminum pellets (250) were provided to manufacture an aluminum-air battery (ex5-1) according to Experimental Example 5-1.

[0209]

[0210] Manufacturing of aluminum-air battery (ex5-2) according to Experimental Example 5-2

[0211] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 3 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 14.6952 cm per 2 g. 2 To this end, 52 of the above aluminum pellets (250) were provided to manufacture an aluminum-air battery (ex5-2) according to Experimental Example 5-2.

[0212]

[0213] Manufacturing of aluminum-air battery (ex5-3) according to Experimental Example 5-3

[0214] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To this end, 22 of the above aluminum pellets (250) were provided to manufacture an aluminum-air battery (ex5-3) according to Experimental Example 5-3.

[0215]

[0216] Manufacturing of aluminum-air battery (ex5-4) according to Experimental Example 5-4

[0217] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To this end, 7 of the above aluminum pellets (250) were provided to manufacture an aluminum-air battery (ex5-4) according to Experimental Example 5-4.

[0218]

[0219] Manufacturing of aluminum-air battery (ex5-5) according to Experimental Example 5-5

[0220] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three of the above aluminum pellets (250) were provided, and an aluminum-air battery (ex5-5) according to Experimental Example 5-5 was manufactured.

[0221]

[0222] Manufacturing of aluminum-air battery (ex5-6) according to Experimental Example 5-6

[0223] In the experimental example 1-2 described above, the aluminum pellet (250) having a diameter of 9 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 5.0868 cm per 2 g. 2 To achieve this, two of the above aluminum pellets (250) were provided, and an aluminum-air battery (ex5-6) according to Experimental Example 5-6 was manufactured.

[0224]

[0225] The experimental examples 5-1 to 5-6 described above can be summarized as shown in Table 9 below.

[0226] Aluminum pellet (250) Purity: 99.5% Sphere diameter (mm) Surface area (cm) 2 ) Number (pieces) Experimental Example 5-1 (ex1-1) 222.2312177 Experimental Example 5-2 (ex1-2) 314.695252 Experimental Example 5-3 (ex1-3) 411.052822 Experimental Example 5-4 (ex1-4) 67.91287 Experimental Example 5-5 (ex1-5) 86.02883 Experimental Example 5-6 (ex1-6) 95.08682

[0227] Figure 9 is a graph measuring the performance of an aluminum-air battery according to experimental examples 5-1 to 5-6 of the present application.

[0228] The performance of the aluminum-air battery according to the experimental examples 5-1 to 5-6 with reference to Fig. 9 can be summarized as shown in Table 10 below.

[0229] Change in the old spray gun (g)Average discharge voltageCurrentCapacity densityCurrent efficiencyEnergy densityFuel efficiencyBeforeAfterresult(V)(mA)(mAh / g)(%)(Wh / kg)(%)Experimental example 5-1(ex1-1)1.99871.94840.05030.4810.00397.6113.34190.852.36Experimental example 5-2(ex1-2)2.0121.93180.08020.9510.00249.388.37236.912.92Experimental example 5-3(ex1-3)2.0121.97940.03260.8510.00613.5020.59521.476.44Experimental example 5-4(ex1-4)2.14082.11330.02751.0010.00727.2724.41726.318.97Experimental Example 5-5(ex1-5)2.15652.12770.02881.0210.00694.4423.30710.228.77Experimental Example 5-6(ex1-6)2.07522.04280.03240.9910.00617.2820.71611.117.54

[0230] Referring to Fig. 9 and Table 10, it can be confirmed that the aluminum-air battery (ex5-4) according to Experimental Example 5-4 has the highest energy density, capacity density, current efficiency, and fuel efficiency.

[0231] This results in a purity of 99.5%, a diameter of 6 mm, and a length of 7.9128 cm. 2 The aluminum-air battery (100) including the aluminum pellet (250) can be proven to have maximized energy density, capacity density, current efficiency, and fuel efficiency.

[0232] Also, 6 mm diameter and 7.9128 cm 2 Through the above aluminum pellet (250), it can be inferred that the parasitic reaction in the aluminum electrode (110) is minimized.

[0233]

[0234] Manufacturing of aluminum-air battery (ex6-1) according to Experimental Example 6-1

[0235] In the experimental example 1-1 described above, 0.1 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To this end, 177 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-1) according to Experimental Example 6-1.

[0236]

[0237] Manufacturing of aluminum-air battery (ex6-2) according to Experimental Example 6-2

[0238] In the experimental example 6-1 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To this end, 22 of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-2) according to Experimental Example 6-2.

[0239]

[0240] Manufacturing of aluminum-air battery (ex6-3) according to Experimental Example 6-3

[0241] In the experimental example 6-1 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To this end, 7 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-3) according to Experimental Example 6-3.

[0242]

[0243] Manufacturing of aluminum-air battery (ex6-4) according to Experimental Example 6-4

[0244] In the experimental example 6-1 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-4) according to Experimental Example 6-4.

[0245]

[0246] Manufacturing of aluminum-air battery (ex6-5) according to Experimental Example 6-5

[0247] In the experimental example 1-1 described above, 0.5 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To this end, 177 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-5) according to Experimental Example 6-5.

[0248]

[0249] Manufacturing of aluminum-air battery (ex6-6) according to Experimental Example 6-6

[0250] In the experimental example 6-5 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To this end, 22 of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-6) according to Experimental Example 6-6.

[0251]

[0252] Manufacturing of aluminum-air battery (ex6-7) according to Experimental Example 6-7

[0253] In the experimental example 6-5 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To this end, 7 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-7) according to Experimental Example 6-7.

[0254]

[0255] Manufacturing of aluminum-air battery (ex6-8) according to Experimental Example 6-8

[0256] In the experimental example 6-5 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To this end, three of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-8) according to Experimental Example 6-8.

[0257]

[0258] Manufacturing of aluminum-air battery (ex6-9) according to Experimental Example 6-9

[0259] In the experimental example 1-1 described above, 1 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To this end, 177 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-9) according to Experimental Example 6-9.

[0260]

[0261] Manufacturing of aluminum-air battery (ex6-10) according to Experimental Example 6-10

[0262] In the experimental example 6-9 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To this end, 22 of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-10) according to Experimental Example 6-10.

[0263]

[0264] Manufacturing of aluminum-air battery (ex6-11) according to Experimental Example 6-11

[0265] In the experimental example 6-9 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To this end, 7 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-11) according to Experimental Example 6-11.

[0266]

[0267] Manufacturing of aluminum-air battery (ex6-12) according to Experimental Example 6-12

[0268] In the experimental example 6-9 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To this end, three of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-12) according to Experimental Example 6-12.

[0269]

[0270] Manufacturing of aluminum-air battery (ex6-13) according to Experimental Example 6-13

[0271] In the experimental example 1-1 described above, 2 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To this end, 177 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-13) according to Experimental Example 6-13.

[0272]

[0273] Manufacturing of aluminum-air battery (ex6-14) according to Experimental Example 6-14

[0274] In the experimental example 6-13 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To achieve this, 22 of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-14) according to Experimental Example 6-14.

[0275]

[0276] Manufacturing of aluminum-air battery (ex6-15) according to Experimental Example 6-15

[0277] In the experimental example 6-13 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To this end, 7 aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-15) according to Experimental Example 6-15.

[0278]

[0279] Manufacturing of aluminum-air battery (ex6-16) according to Experimental Example 6-16

[0280] In the experimental example 6-13 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To this end, three of the above aluminum pellets (250) were provided, and the applied current was fixed at 10 mA, thereby manufacturing an aluminum-air battery (ex6-16) according to Experimental Example 6-16.

[0281]

[0282] The experimental examples 6-1 to 6-16 described above can be summarized as shown in Table 11 below.

[0283] Aluminum pellet (250) Purity: 99.5% Spherical fraction Sodium oxide (M) Diameter (mm) Surface area (cm) 2 )Experimental Example 6-1(ex6-1)0.1222.2312Experimental Example 6-2(ex6-2)411.0528Experimental Example 6-3(ex6-3)67.9128Experimental Example 6-4(ex6-4)86.0288Experimental Example 6-5(ex6-5)0.5222.2312Experimental Example 6-6(ex6-6)411.0528Experimental Example 6-7(ex6-7)67.9128Experimental Example 6-8(ex6-8)86.0288Experimental Example 6-9(ex6-9)1222.2312Experimental Example 6-10(ex6-10)411.0528Experimental Example 6-11(ex6-11)67.9128Experimental Example 6-12(ex6-12)86.0288Experimental example 6-13(ex6-13)2222.2312Experimental example 6-14(ex6-14)411.0528Experimental example 6-15(ex6-15)67.9128Experimental example 6-16(ex6-16)86.0288

[0284] The energy densities measured in the aluminum-air batteries according to Experimental Examples 6-1 to 6-16 of the present application can be summarized as shown in Table 12 below.

[0285] Classification Energy density (Wh / kg) Experimental example 6-1 (ex6-1) - Experimental example 6-2 (ex6-2) - Experimental example 6-3 (ex6-3) - Experimental example 6-4 (ex6-4) - Experimental example 6-5 (ex6-5) 190.85 Experimental example 6-6 (ex6-6) 521.47 Experimental example 6-7 (ex6-7) 726.31 Experimental example 6-8 (ex6-8) 710.31 Experimental example 6-9 (ex6-9) 77.94 Experimental example 6-10 (ex6-10) 228.42 Experimental example 6-11 (ex6-11) 323.91 Experimental example 6-12 (ex6-12) 394.33 Experimental example 6-13 (ex6-13) 54.23 Experimental example 6-14(ex6-14)59.54Experimental example 6-15(ex6-15)170.01Experimental example 6-16(ex6-16)187.77

[0286] Referring to Table 12, it can be confirmed that the aluminum-air battery (ex6-7) according to the above experimental example 6-7 has the highest energy density.

[0287] Hereby, the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol is included, and has a purity of 99.5%, a diameter of 6 mm, and a length of 7.9128 cm. 2 It can be proven that the aluminum-air battery (100) including the aluminum pellet (250) has maximized energy density under a 10 mA applied current.

[0288] In addition, the electrolyte (130) containing 0.5 M sodium hydroxide and 20 vol% glycerol and a 6 mm diameter and 7.9128 cm 2 Through the above aluminum pellet (250), it can be inferred that the parasitic reaction of the aluminum electrode (110) is minimized under a 10 mA applied current.

[0289]

[0290] Manufacturing of aluminum-air battery (ex7-1) according to Experimental Example 7-1

[0291] In the experimental example 1-1 described above, 0.5 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To achieve this, 177 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-1) was manufactured according to Experimental Example 7-1.

[0292]

[0293] Manufacturing of aluminum-air battery (ex7-2) according to Experimental Example 7-2

[0294] In the experimental example 7-1 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To achieve this, 22 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-2) was manufactured according to Experimental Example 7-2.

[0295]

[0296] Manufacturing of aluminum-air battery (ex7-3) according to Experimental Example 7-3

[0297] In the experimental example 7-1 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To achieve this, 7 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-3) was manufactured according to Experimental Example 7-3.

[0298]

[0299] Manufacturing of aluminum-air battery (ex7-4) according to Experimental Example 7-4

[0300] In the experimental example 7-1 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-4) was manufactured according to Experimental Example 7-4.

[0301]

[0302] Manufacturing of aluminum-air battery (ex7-5) according to Experimental Example 7-5

[0303] In the experimental example 7-1 described above, the aluminum pellet (250) having a diameter of 9 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 5.0868 cm per 2 g. 2 To achieve this, two aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-5) was manufactured according to Experimental Example 7-5.

[0304]

[0305] Manufacturing of aluminum-air battery (ex7-6) according to Experimental Example 7-6

[0306] In the experimental example 1-1 described above, 1 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To achieve this, 177 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-6) was manufactured according to Experimental Example 7-6.

[0307]

[0308] Manufacturing of aluminum-air battery (ex7-7) according to Experimental Example 7-7

[0309] In the experimental example 7-6 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To achieve this, 22 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-7) was manufactured according to Experimental Example 7-7.

[0310]

[0311] Manufacturing of aluminum-air battery (ex7-8) according to Experimental Example 7-8

[0312] In the experimental example 7-6 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To achieve this, 7 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-8) was manufactured according to Experimental Example 7-8.

[0313]

[0314] Preparation of aluminum-air battery (ex7-9) according to Experimental Example 7-9

[0315] In the experimental example 7-6 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-9) was manufactured according to Experimental Example 7-9.

[0316]

[0317] Manufacturing of aluminum-air battery (ex7-10) according to Experimental Example 7-10

[0318] In the experimental example 7-6 described above, the aluminum pellet (250) having a diameter of 9 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 5.0868 cm per 2 g. 2 To achieve this, two aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-10) was manufactured according to Experimental Example 7-10.

[0319]

[0320] Manufacturing of aluminum-air battery (ex7-11) according to Experimental Example 7-11

[0321] In the experimental example 1-1 described above, 2 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To achieve this, 177 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-11) was manufactured according to Experimental Example 7-11.

[0322]

[0323] Manufacturing of aluminum-air battery (ex7-12) according to Experimental Example 7-12

[0324] In the experimental example 7-11 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To achieve this, 22 aluminum pellets (250) are provided, and 10 mA / cm 2By fixing the applied current density, an aluminum-air battery (ex7-12) was manufactured according to Experimental Example 7-12.

[0325]

[0326] Manufacturing of aluminum-air battery (ex7-13) according to Experimental Example 7-13

[0327] In the experimental example 7-11 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To achieve this, 7 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-13) was manufactured according to Experimental Example 7-13.

[0328]

[0329] Manufacturing of aluminum-air battery (ex7-14) according to Experimental Example 7-14

[0330] In the experimental example 7-11 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-14) was manufactured according to Experimental Example 7-14.

[0331]

[0332] Manufacturing of aluminum-air battery (ex7-15) according to Experimental Example 7-15

[0333] In the experimental example 7-11 described above, the aluminum pellet (250) having a diameter of 9 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 5.0868 cm per 2 g. 2To achieve this, two aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-15) was manufactured according to Experimental Example 7-15.

[0334]

[0335] Manufacturing of aluminum-air battery (ex7-16) according to Experimental Example 7-16

[0336] In the experimental example 1-1 described above, 4 M sodium hydroxide was dissolved, and the aluminum pellet (250) having a diameter of 2 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 22.2312 cm per 2 g. 2 To achieve this, 177 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-16) was manufactured according to Experimental Example 7-16.

[0337]

[0338] Manufacturing of aluminum-air battery (ex7-17) according to Experimental Example 7-17

[0339] In the experimental example 7-16 described above, the aluminum pellet (250) having a diameter of 4 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 11.0528 cm per 2 g. 2 To achieve this, 22 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-17) was manufactured according to Experimental Example 7-17.

[0340]

[0341] Manufacturing of aluminum-air battery (ex7-18) according to Experimental Example 7-18

[0342] In the experimental example 7-16 described above, the aluminum pellet (250) having a diameter of 6 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 7.9128 cm per 2 g. 2 To achieve this, 7 aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-18) was manufactured according to Experimental Example 7-18.

[0343]

[0344] Manufacturing of aluminum-air battery (ex7-19) according to Experimental Example 7-19

[0345] In the experimental example 7-16 described above, the aluminum pellet (250) having a diameter of 8 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 6.0288 cm per 2 g. 2 To achieve this, three aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-19) was manufactured according to Experimental Example 7-19.

[0346]

[0347] Preparation of aluminum-air battery (ex7-20) according to Experimental Example 7-20

[0348] In the experimental example 7-16 described above, the aluminum pellet (250) having a diameter of 9 mm was manufactured, and the surface area of ​​the aluminum pellet (250) accommodated in the accommodation space (111) was 5.0868 cm per 2 g. 2 To achieve this, two aluminum pellets (250) are provided, and 10 mA / cm 2 By fixing the applied current density, an aluminum-air battery (ex7-20) was manufactured according to Experimental Example 7-20.

[0349]

[0350] The experimental examples 7-1 to 7-20 described above can be summarized as shown in Table 13 below.

[0351] Aluminum pellet (250) Purity: 99.5% Spherical fraction Sodium oxide (M) Diameter (mm) Surface area (cm) 2 )Experimental Example 7-1 (ex7-1) 0.5222.2312Experimental Example 7-2 (ex7-2) 411.0528Experimental Example 7-3 (ex7-3) 67.9128Experimental Example 7-4 (ex7-4) 86.0288Experimental Example 7-5 (ex7-5) 95.0868Experimental Example 7-6 (ex7-6) 1222.2312Experimental Example 7-7 (ex7-7) 411.0528Experimental Example 7-8 (ex7-8) 67.9128Experimental Example 7-9 (ex7-9) 86.0288Experimental Example 7-10 (ex7-10) 95.0868Experimental Example 7-11 (ex7-11) 2222.2312Experimental Example 7-12 (ex7-12) 411.0528 Experimental Example 7-13 (ex7-13) 67.9128 Experimental Example 7-14 (ex7-14) 86.0288 Experimental Example 7-15 (ex7-15) 95.0868 Experimental Example 7-16 (ex7-16) 4222.2312 Experimental Example 7-17 (ex7-17) 411.0528 Experimental Example 7-18 (ex7-18) 67.9128 Experimental Example 7-19 (ex7-19) 86.0288 Experimental Example 7-20 (ex7-20) 95.0868

[0352] The energy density measured in the aluminum-air battery according to Experimental Examples 7-1 to 7-20 of the present application can be summarized as shown in Table 14 below.

[0353] Classification Energy density (Wh / kg) Experimental example 7-1 (ex7-1) - Experimental example 7-2 (ex7-2) - Experimental example 7-3 (ex7-3) - Experimental example 7-4 (ex7-4) - Experimental example 7-5 (ex7-5) - Experimental example 7-6 (ex7-6) - Experimental example 7-7 (ex7-7) 461.51 Experimental example 7-8 (ex7-8) 1125.38 Experimental example 7-9 (ex7-9) 1314.31 Experimental example 7-10 (ex7-10) 1350.99 Experimental example 7-11 (ex7-11) 179.46 Experimental example 7-12 (ex7-12) 953.16 Experimental example 7-13 (ex7-13) 1063.62 Experimental example 7-14 (ex7-14) 1120.10 Experimental example 7-15 (ex7-15) 1090.85 Experimental example 7-16 (ex7-16) 222.49 Experimental example 7-17 (ex7-17) 741.51 Experimental example 7-18 (ex7-18) 802.69 Experimental example 7-19 (ex7-19) 739.97 Experimental example 7-20 (ex7-20) 800.42

[0354] Referring to Table 14, it can be confirmed that the aluminum-air battery (ex7-10) according to the above experimental example 7-10 has the highest energy density.

[0355] This means 10 mA / cm 2 Under the applied current density of , the electrolyte (130) containing 1 M sodium hydroxide and 20 vol% glycerol, having a purity of 99.5%, a diameter of 9 mm, and a length of 5.0868 cm 2 It can be seen that the energy density of the aluminum-air battery (100) including the aluminum pellet (250) is maximized.

[0356] Also, 10 mA / cm 2 Under the applied current density of , the electrolyte (130) containing 1 M sodium hydroxide and 20 vol% glycerol and a 9 mm diameter and 5.0868 cm 2 Through the above aluminum pellet (250), it can be inferred that the parasitic reaction of the aluminum electrode (110) is minimized.

[0357]

[0358] Manufacturing of aluminum-air battery (ex8-1) according to Experimental Example 8-1

[0359] The electrolyte (130) was prepared by dissolving 4 M sodium hydroxide (NaOH) and 1000 ppm polyvinyl alcohol (PVA) in deionized water (DI water) having an electrical resistance of 15 MΩ or more.

[0360] The housing (112) was manufactured with stainless steel mesh so that the receiving space (111) capable of receiving the aluminum pellet (250) was formed inside.

[0361] A6014 waste aluminum was collected, and aluminum pellets (250) having a width of 1.5 cm, a height of 1.5 cm, and a thickness of 2 mm with a purity of 99.99% were manufactured through melting and casting, and provided into the receiving space (111) inside the housing (112), thereby manufacturing the aluminum electrode (110).

[0362] The air electrode (120) was prepared based on polytetrafluoroethylene (PTFE) and including a manganese oxide (MnO2) catalyst and a nickel mesh (Ni mesh) current collector.

[0363] The aluminum electrode (110) and the air electrode (120) were placed in a water tank so as to be in contact with the electrolyte (130) and electrically connected to manufacture an aluminum-air battery (ex8-1) according to Experimental Example 8-1.

[0364]

[0365] Manufacturing of aluminum-air battery (ex8-2) according to Experimental Example 8-2

[0366] In the experimental example 8-1 described above, an aluminum-air battery (ex8-2) according to experimental example 8-2 was manufactured using A6063 waste aluminum.

[0367]

[0368] Manufacturing of aluminum-air battery (ex8-3) according to Experimental Example 8-3

[0369]

[0370] In the experimental example 8-1 described above, an aluminum-air battery (ex8-3) according to experimental example 8-3 was manufactured using A6082 waste aluminum.

[0371]

[0372] Manufacturing of aluminum-air battery (ex8-4) according to Experimental Example 8-4

[0373] In the experimental example 8-1 described above, an aluminum-air battery (ex8-4) according to experimental example 8-4 was manufactured using A6N01 waste aluminum.

[0374]

[0375] The experimental examples 8-1 to 8-4 described above can be summarized as shown in Table 15 below.

[0376] Classification Aluminum Experimental Example 8-1 (ex8-1) A6014 Experimental Example 8-2 (ex8-2) A6063 Experimental Example 8-3 (ex8-3) A6082 Experimental Example 8-4 (ex8-4) A6N01

[0377] Figure 10 is a graph measuring the performance of an aluminum-air battery according to experimental examples 8-1 to 8-4 of the present application.

[0378] The performance of the aluminum-air battery according to the experimental examples 8-1 to 8-4 with reference to Fig. 10 can be summarized as shown in Table 16 below.

[0379] Discharge voltage / current density / capacity density / energy density (V) (mA / cm) 2 )(mAh / g)(Wh / kg)Experimental Example 8-1(ex8-1)0.9210.002666.672448.8Experimental Example 8-2(ex8-2)0.9710.003225.813151.7Experimental Example 8-3(ex8-3)1.0910.002439.022667.9Experimental Example 8-4(ex8-4)1.0410.002702.702823.7

[0380] Referring to Fig. 10 and Table 16, it can be confirmed that the capacity density and energy density of the aluminum-air battery (ex8-2) according to Experimental Example 8-2 above are the highest.

[0381] Accordingly, it can be seen that when A6063 is used as the waste aluminum of the aluminum pellet (250), the capacity density and energy density of the aluminum-air battery (100) are maximized.

[0382]

[0383] Figure 11 is a graph showing the energy density of an aluminum-air battery according to Experimental Example 8-2 of the present application and an aluminum-air battery manufactured from another aluminum material.

[0384] Referring to Fig. 11, the energy density of the aluminum-air battery (ex8-2) according to the above experimental example 8-2 is 3151.7 Wh kg -1 This is a fairly high level, and when comparing the generation cost considering the energy density, it can be seen that the cost of power generation can be saved by about 97%, that is, from the generation cost of 4,695 won / kWh to 132 won / kWh using waste aluminum.

[0385]

[0386] Manufacturing of aluminum-air battery (ex9-1) according to Experimental Example 9-1

[0387] The electrolyte (130) was prepared by dissolving 4 M sodium hydroxide (NaOH) in deionized water (DI water) having an electrical resistance of 15 MΩ or more.

[0388] The housing (112) was manufactured with stainless steel mesh so that the receiving space (111) capable of receiving the aluminum pellet (250) was formed inside.

[0389] Aluminum was collected, melted and cast to produce aluminum pellets (250) having a width of 1.5 cm, a height of 1.5 cm, and a thickness of 2 mm with a purity of 99.99%, and provided into the receiving space (111) inside the housing (112), thereby producing the aluminum electrode (110).

[0390] The air electrode (120) was prepared based on polytetrafluoroethylene (PTFE) and including a manganese oxide (MnO2) catalyst and a nickel mesh (Ni mesh) current collector.

[0391] The aluminum electrode (110) and the air electrode (120) were placed in a water tank so as to be in contact with the electrolyte (130) and electrically connected to manufacture an aluminum-air battery (ex9-1) according to Experimental Example 9-1.

[0392]

[0393] Manufacturing of aluminum-air battery (ex9-2) according to Experimental Example 9-2

[0394] In the experimental example 9-1 described above, an aluminum-air battery (ex9-2) according to experimental example 9-2 was manufactured by further adding 1000 ppm of polyvinyl alcohol (PVA) as an additive.

[0395]

[0396] The experimental examples 9-1 and 9-2 described above can be summarized as shown in Table 17 below.

[0397] Electrolyte (130) Experimental Example 9-1 (ex9-1) 4 M sodium hydroxide Experimental Example 9-2 (ex9-2) 4 M sodium hydroxide + 1000 ppm polyvinyl alcohol

[0398] Figure 12 is a graph measuring the performance of an aluminum-air battery according to experimental examples 9-1 and 9-2 of the present application.

[0399] The performance of the aluminum-air battery according to the experimental examples 9-1 and 9-2 with reference to Fig. 12 can be summarized as shown in Table 18 below.

[0400] Classification Average voltage Capacity density Energy density (V) (mAh / g) (Wh / kg) Experimental example 9-1 (ex9-1) 1.30 186 9.56 113 0.43 Experimental example 9-2 (ex9-2) 1.43 322 64.15 323 7.74

[0401] Referring to Fig. 12 and Table 18, it can be confirmed that the capacity density and energy density of the aluminum-air battery (ex9-2) according to Experimental Example 9-2 are higher than those of Experimental Example 9-1 (ex9-1).

[0402] Accordingly, it can be proven that the aluminum-air battery (100) including the electrolyte (130) containing polyvinyl alcohol as the additive has maximized capacity density and energy density.

[0403] Additionally, it can be inferred that parasitic reactions in the aluminum electrode (110) are minimized through the electrolyte (130) containing polyvinyl alcohol as the additive.

[0404] In addition, referring to FIG. 12 and Table 18, it can be seen that in the case of the aluminum-air battery (ex9-2) according to the experimental example 9-2, about 65% of the power production cost can be saved.

[0405]

[0406] Figure 13 is a drawing comparing the manufacturing process and power generation cost economy of aluminum of an aluminum-air battery system according to an embodiment and experimental example of the present application and conventional aluminum.

[0407] Through Fig. 13(a), the manufacturing process of aluminum through the aluminum-air battery system (1000) according to the embodiment and experimental example of the present application can be confirmed, and through Fig. 13(b), the manufacturing process of conventional aluminum can be confirmed.

[0408] Referring to Fig. 13(b), the cost of the manufacturing process of aluminum through conventional bauxite smelting may be 1,625 won / kg when bauxite is smelted into 99.9% aluminum, and 1,404 won / kg when 99.9% aluminum is refined into 99.995% aluminum, and the total cost may be 3,029 won / kg.

[0409]

[0410] Referring to FIG. 13(a), the cost of the manufacturing process of aluminum through the aluminum-air battery system (1000) according to the embodiment and experimental example of the present application may be 260 won / kg when calcining aluminum hydroxide into aluminum oxide, and 1,170 won / kg when electrolyzing aluminum oxide into 99.995% aluminum, because byproducts generated during the operation of the aluminum-air battery system (1000) are utilized, and the total cost may be 1,430 won / kg.

[0411] Comparing the manufacturing process and power generation cost economy of the aluminum-air battery system (1000) according to the embodiment and experimental example of the present application with that of conventional aluminum, it can be seen that the aluminum production cost is reduced by about 50% in the embodiment and experimental example of the present application compared to the conventional one.

[0412] According to the aluminum-air battery system (1000) according to the embodiments and experimental examples of the present application, the open loop power generation unit cost, i.e., the unit cost for producing electricity in an open system, is calculated as 132 won / kWh by applying the sales price of aluminum hydroxide, a battery byproduct, and subtracting 351 won / kg of the aluminum hydroxide sales price from the recycled aluminum unit price of 1,700 won / kg, dividing by the energy density of the aluminum-air battery (100), 3,151 Wh / kg, and multiplying this by 31%, which is the ratio of the aluminum electrode (110).

[0413] In addition, according to the aluminum-air battery system (1000) according to the embodiments and experimental examples of the present application, the closed loop power generation cost, that is, the unit cost for producing electricity in a closed system, is the power generation cost in which the byproduct of the aluminum-air battery (100) is regenerated into the aluminum electrode (110) through electrolytic reduction, and the cost of the aluminum manufacturing process using the byproduct, 1,430 won / kg, is divided by the energy density of the aluminum-air battery (100), 3,151 Wh / kg, and multiplied by 31%, which is the ratio of the aluminum electrode (110), to obtain 140 won / kWh.

[0414]

[0415] While the present application has been described in detail using preferred embodiments, the scope of the present application is not limited to the specific embodiments and should be interpreted in accordance with the appended claims. Furthermore, those skilled in the art will appreciate that numerous modifications and variations are possible without departing from the scope of the present application.

Claims

1. A battery part including an aluminum electrode that emits electrons; and An aluminum-air battery system comprising an aluminum pellet manufacturing unit that provides aluminum pellets manufactured from aluminum to the aluminum electrode.

2. In paragraph 1, The above battery department, an air electrode to which the emitted electrons are provided; and An aluminum-air battery system further comprising an electrolyte that transfers ions between the aluminum electrode and the air electrode.

3. In paragraph 2, The above electrolyte comprises an alkali salt, An aluminum-air battery system, wherein the alkali salt comprises sodium hydroxide (NaOH) of more than 0.1 M and less than 8 M.

4. In paragraph 3, The above electrolyte further includes an additive that minimizes parasitic reactions of the aluminum electrode, The above additive is an aluminum-air battery system containing glycerol or polyvinyl alcohol (PVA).

5. In paragraph 4, An aluminum-air battery system, wherein the additive comprises glycerol in an amount of more than 10 vol% and less than 30 vol%.

6. In paragraph 2, The above aluminum electrode, A space for receiving the above aluminum pellets; and A housing that surrounds the aluminum pellets accommodated in the above-mentioned receiving space and provides a reaction path between the aluminum pellets and the electrolyte, The above pellet manufacturing unit, An aluminum-air battery system comprising providing aluminum pellets to the receiving space before the aluminum pellets received in the receiving space are depleted.

7. In paragraph 6, The above pellet manufacturing unit, Aluminum inlet through which aluminum flows; A molding module for manufacturing the aluminum pellets from the aluminum introduced into the aluminum inlet; and Including a pellet discharge port for providing the aluminum pellets manufactured in the above molding module to the receiving space, Through the pellet discharge port, the surface area of ​​the aluminum pellets received in the receiving space is 3.1415 cm per 0.1 g or more and 3 g or less. 2 Exceeds 22.2312 cm 2 An aluminum-air battery system comprising providing the aluminum pellets so as to be less than.

8. In the aluminum electrode used in the aluminum-air battery, A receiving space for receiving aluminum pellets manufactured from aluminum; and An aluminum electrode comprising a housing that surrounds the aluminum pellets accommodated in the accommodation space and provides a reaction path between the aluminum pellets and the electrolyte.

9. In paragraph 8, The housing has a capacity of 3.1415 cm per 0.1 g to 3 g in the receiving space. 2 Exceeds 22.2312 cm 2 An aluminum electrode comprising an aluminum pellet having a surface area of ​​less than 100 µm.

10. In paragraph 8, An aluminum electrode, wherein the housing includes a mesh structure that provides a reaction path between the aluminum pellets and the electrolyte.

11. In aluminum pellets used in aluminum-air batteries, An aluminum pellet having a diameter controlled to have a surface area according to the energy density of the aluminum-air battery.

12. In paragraph 11, Contains aluminum, 3.1415 cm per 0.1 g or more and 3 g or less 2 Exceeds 22.2312 cm 2 Contains a surface area of ​​less than Aluminum pellets having a diameter of 1 mm or more and less than 10 mm.

13. A method for manufacturing aluminum pellets used in aluminum-air batteries, Steps for preparing aluminum; and Comprising a step of manufacturing aluminum pellets from the above aluminum, The step of manufacturing the above aluminum pellets is: A method for manufacturing aluminum pellets, comprising controlling the diameter so that the surface area of ​​the aluminum pellets is adjusted according to the energy density of the aluminum-air battery.

14. In paragraph 13, The above aluminum pellets are, Controlled to a diameter of 1 mm or more and less than 10 mm, 3.1415 cm 2 Exceeds 22.2312 cm 2 A method for manufacturing aluminum pellets, comprising controlling the surface area below.

15. In paragraph 13, A method for manufacturing aluminum pellets, wherein the aluminum comprises waste aluminum.

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