Metallic aqueous battery comprising anode current collector

Abstract

The invention relates to an aqueous metal battery comprising an anode current collector. The metal aqueous battery includes a dual cell comprising a pair of single cells. Specifically, each single cell includes: an anode; a cathode; a separator interposed between the anode and the cathode; an electrode plate having an internal space configured to accommodate the anode; and an anode current collector disposed in the internal space. The internal space of the electrode plate communicates with the outside via an opening formed in one surface of the electrode plate. Further, the anode current collector includes a body having the shape of a container, the body having an open upper portion and a closed bottom surface so as to accommodate the anode. The metal aqueous battery has a novel structure in which the current generation rate is increased.

Description

Technical Field

[0001] The present disclosure relates to a metal aqueous battery including an anode current collector having a new structure in which a current generation rate is increased. Background Art

[0002] In recent years, research on electrochemical water electrolysis is being actively conducted with the development of renewable energy in response to climate change. In addition, reducing greenhouse gas carbon dioxide (CO 2 )Capture, storage and transformation technologies are becoming increasingly important.

[0003] Aqueous zinc / aluminum (Zn / Al)-based battery systems are very economical metal cathode (cathode) candidates in terms of price and reserve. Aqueous zinc / aluminum (Zn / Al)-based battery systems are a promising approach to generate hydrogen and capture salts (such as KHCO 3 ) form of carbon dioxide.

[0004] However, existing metal aqueous batteries are single cells including one anode and one cathode or a stack of these single cells, and thus the current obtained from the existing metal aqueous batteries is limited.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore this background section may contain information that does not constitute the prior art that is already known to a person skilled in the art. Summary of the invention

[0006] The present disclosure has been made in an effort to solve the above-mentioned problems associated with the prior art, and an object of the present disclosure is to provide a metal aqueous battery having improved current generation amount and current generation rate.

[0007] Another object of the present disclosure is to provide a metal aqueous battery in which an electrolyte can be smoothly circulated.

[0008] The purpose of the present disclosure is not limited to the above-mentioned purpose. From the following description, the purpose of the present disclosure will become clearer and can be achieved by the methods stated in the claims and their combinations.

[0009] In one aspect of the present disclosure, a metal aqueous battery includes a double cell formed by stacking a pair of single cells (a pair of single cells). Each single cell includes an anode, a cathode, and a separator disposed between the anode and the cathode. A cathode collector is disposed between the corresponding cathodes of the single cell so that the cathodes face each other. Each single cell may include a plate including an internal space configured to accommodate an anode. The internal space of the plate is connected to the outside because one surface of the plate is open to the separator. Each single cell may include an anode collector disposed in the internal space. The anode collector may include a body having a shape of a container having an open upper portion and a closed bottom surface to accommodate the anode.

[0010] In one embodiment, the plate may be provided in the form of a barrel including a lower surface, a front surface configured to be at least partially open, a rear surface configured to face the front surface, and a side surface configured to connect the front surface and the rear surface. The plate may include a first anode electrolyte inlet formed in an area of ​​the lower surface, a second anode electrolyte inlet formed in some areas of the rear surface, and an anode electrolyte outlet formed in an upper portion of the side surface.

[0011] In another embodiment, the anode current collector may further include an extension portion having a shape of a panel configured to extend upward from the body. The extension portion may be exposed to the outside of the electrode plate and may be connected to the cathode current collector through a wire.

[0012] In another embodiment, the body may be in the form of a square barrel with an open upper portion.

[0013] In another embodiment, the body may include a first plate portion disposed close to the diaphragm, and may include a second plate portion configured to face the first plate portion. At least one of the first plate portion or the second plate portion of the body may have an inclined shape from top to bottom.

[0014] In another embodiment, the body may include a plurality of through holes formed through the body and having a predetermined shape, and the anode electrolyte may pass through the body via the through holes.

[0015] In another embodiment, the anode current collector may further include at least one auxiliary plate inserted into the body. The auxiliary plate may include a plurality of through holes formed therethrough and having a predetermined shape.

[0016] In another embodiment, the anode may have the form of a pellet.

[0017] In another embodiment, the average diameter of the anode may be 1 mm to 10 mm.

[0018] In another embodiment, the anode may include at least one selected from the group consisting of lithium (Li), sodium (Na), magnesium (Mg), zinc (Zn), aluminum (Al), and combinations thereof.

[0019] In another embodiment, the cathode may include a noble metal catalyst supported on a support.

[0020] In another embodiment, each unit cell may further include a cathode separator interposed between the separator and the cathode to form a gap between the separator and the cathode.

[0021] In another embodiment, the cathode spacer may be provided in the form of a frame having a hole in its central portion, and may support the edge of the diaphragm to form a gap. The cathode spacer may include a cathode electrolyte inlet formed through a portion of one side surface of the cathode spacer so as to communicate with the gap. The cathode spacer may also include a cathode electrolyte outlet formed through a portion of the other side surface of the cathode spacer at a position separated from the cathode electrolyte inlet by a specified distance so as to communicate with the gap.

[0022] In another embodiment, the metal aqueous battery may further include a membrane spacer between the electrode plate and the membrane. The membrane spacer has a specified thickness and is provided in the form of a frame having a hole in its central portion. The membrane spacer may support the edge of the membrane so that the internal space of the electrode plate expands (expands) the thickness of the membrane spacer.

[0023] In another embodiment, the metal aqueous battery may further include an anode electrolyte accommodated in the space between the anode and the separator. The metal aqueous battery may further include a cathode electrolyte accommodated in the space between the cathode and the separator.

[0024] In another embodiment, the anode electrolyte may include an alkali metal hydroxide.

[0025] In another embodiment, the cathode electrolyte may include hydrogen ions and bicarbonate ions.

[0026] Other aspects and embodiments of the disclosure are discussed below.

[0027] The above and other features of the present disclosure are discussed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features of the present disclosure will now be described in detail with reference to certain embodiments of the present disclosure illustrated in the accompanying drawings, which are provided for illustrative purposes only and thus do not limit the present disclosure, and

[0029] in:

[0030] Figure 1 A metal aqueous battery according to one embodiment of the present disclosure is shown;

[0031] Figure 2 shows a plate according to one embodiment of the present disclosure;

[0032] Figure 3 An anode current collector according to a first embodiment of the present disclosure is shown;

[0033] Figure 4 An anode current collector according to a modified example of the present disclosure is shown;

[0034] Figure 5 An anode current collector according to a second embodiment of the present disclosure is shown;

[0035] Figure 6 An anode current collector according to a third embodiment of the present disclosure is shown;

[0036] Figure 7 An anode current collector according to a fourth embodiment of the present disclosure is shown;

[0037] Figure 8 shows electrolyte flow in a metal aqueous battery according to the present disclosure;

[0038] Fig. 9 A cathode separator according to the present disclosure is shown;

[0039] Fig.10 A metal aqueous battery according to a comparative example is shown;

[0040] Fig.11 The battery performance of the metal aqueous battery according to Example 1 and the comparative example is shown;

[0041] and

[0042] Fig.12 The battery performances of the metal aqueous batteries according to Examples 2 to 4 are shown.

[0043] It should be understood that the drawings are not necessarily drawn to scale. The drawings present somewhat simplified representations of different features and illustrate the basic principles of the present disclosure. The specific design features of the present disclosure as disclosed herein (including, for example, specific dimensions, orientations, positions, and shapes) should be determined in part by the specific intended application and use environment.

[0044] In the drawings, the same reference numerals are used throughout to refer to the same or equivalent parts of the present disclosure. DETAILED DESCRIPTION

[0045] From the description of the embodiments given below with reference to the accompanying drawings, the above-mentioned objects, other objects, advantages and features of the present disclosure will become apparent. However, the present disclosure is not limited to the embodiments disclosed herein and can be implemented in various different forms. These embodiments are provided to complete the description of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] In the accompanying drawings, even if the elements are shown in different drawings, the same or similar elements are represented by the same reference numerals. In the accompanying drawings, for clarity of description, the size of the structure may be magnified compared to its actual size. In the following description of the embodiment, terms such as "first" and "second" may be used to describe various elements, but do not limit these elements. These terms are only used to distinguish one element from other elements. For example, without departing from the scope and spirit of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. Singular expressions may encompass plural expressions unless such expressions have significantly different contextual meanings.

[0047] In the following description of the embodiments, terms such as "comprises", "includes" and "having" should be interpreted as indicating the presence of features, quantities, steps, operations, elements or components or combinations thereof stated in the description. These terms do not exclude the presence of one or more other features, quantities, steps, operations, elements, components or combinations thereof or the possibility of adding them. In addition, it should be understood that when a component such as a layer, film, region or plate is said to be "on" another component, the component may be "directly" "on" another component, or other components may be between the two components. Similarly, it should be understood that when a component such as a layer, film, region or plate is referred to as being "below" another component, the component may be "directly below" another component, or other components may be between the two components.

[0048] All numerical values, values ​​and / or expressions used in the specification to represent the amount of components, reaction conditions, polymer compositions and blends are approximate values, which reflect the various uncertainties generated in the measurement when these values ​​are obtained from substantially different things. Therefore, it should be understood that unless otherwise stated, values ​​and / or expressions can be modified by the term "about". In addition, it should be understood that if a numerical range is disclosed in the specification, such a range includes all continuous values ​​from the minimum value to the maximum value of the range, unless otherwise stated. In addition, if such a range refers to an integer, the range includes all integers from the minimum integer to the maximum integer, unless otherwise stated.

[0049] When a component, device, element, etc. of the present disclosure is described as having a purpose or performing an operation, function, etc., the component, device or element should be considered herein as being "configured to" satisfy that purpose or perform that operation or function.

[0050] Figure 1 The metal aqueous battery according to the present disclosure is shown. For ease of explanation and understanding, Figure 1 The anode electrolyte A and the cathode electrolyte B are not shown in FIG. Figure 8 middle.

[0051] The metal aqueous battery may include a bi-cell DC obtained by stacking a pair of single cells SC. Each single cell SC includes an anode 30, a cathode 50, and a separator 40 between the anode 30 and the cathode 50. A cathode current collector 60 is interposed between the respective cathodes 50 of the single cells SC so that the cathodes 50 face each other.

[0052] The cathode current collector 60 may be formed of a conductive material. For example, the cathode current collector 60 may be a thin plate formed of stainless steel plated with gold (Au).

[0053] A single cell SC may include an electrode plate 10, an anode collector 20 disposed in an internal space 15 of the electrode plate 10, an anode 30 accommodated in the anode collector 20, a diaphragm 40 stacked on the electrode plate 10, an anode electrolyte A accommodated in the internal space 15 of the electrode plate 10, a cathode 50 located on the diaphragm 40, a cathode separator 70, which is located between the diaphragm 40 and the cathode 50 to form a gap G between the diaphragm 40 and the cathode 50, and the cathode electrolyte B is accommodated in the gap G.

[0054] Figure 2 The electrode plate 10 according to the present disclosure is shown. The electrode plate 10 may be provided in the form of a tube including a lower surface 11, a front surface 12 at least partially open, a rear surface 13 facing the front surface 12, and a side surface 14 connecting the front surface 12 and the rear surface 13. Here, the front surface 12 may refer to one surface of the electrode plate 10 facing the separator 40, and the rear surface 13 may refer to another surface of the electrode plate 10 facing the direction opposite to the front surface 12.

[0055] The electrode plate 10 may be formed of a material having no conductivity but excellent physical properties. For example, the electrode plate 10 may be formed of polycarbonate.

[0056] The plate 10 may include an inner space 15 formed by opening at least a portion of the front surface 12. In other words, a portion of the front surface 12 is open, and thus the inner space 15 is open to the outside.

[0057] In another embodiment, the upper portion of the electrode plate 10 is open, so that the electrode plate 10 can communicate with the outside. Figure 1 As shown, the anode 30 can be supplied to the internal space 15 through the open upper portion of the electrode plate 10. In addition, the metal aqueous battery may further include a cover C detachably mounted on the open upper portion of the electrode plate 10. The size of the cover C is not particularly limited as long as it can block the internal space 15 from the outside. At the same time, the cover C can be formed of a material that does not react with the anode electrolyte A and the anode 30.

[0058] The electrode plate 10 may include: a first anode electrolyte inlet 16 formed in one area of ​​the lower surface 11; a second anode electrolyte inlet 17 formed in some areas of the rear surface 13; and an anode electrolyte outlet 18 formed in the upper portion of the side surface 14. The anode electrolyte A may be introduced into the internal space 15 through the first anode electrolyte inlet 16 and the second anode electrolyte inlet 17 and may be discharged to the outside through the anode electrolyte outlet 18. This is described below.

[0059] Figure 3 An anode current collector 20 according to a first embodiment of the present disclosure is shown. The anode current collector 20 may include a body 21 having a container shape having an open upper portion and a closed lower portion so as to accommodate the anode 30. The anode current collector 20 may further include an extension portion 22 having a panel shape extending upward from the body 21.

[0060] The anode current collector 20 may include a metal having electrical conductivity. In addition, the anode current collector 20 may include a material having sufficient rigidity to bear the weight of the anode 30. For example, the anode current collector 20 may include a stainless steel mesh.

[0061] The extension portion 22 may be exposed to the outside of the electrode plate 10 and may be connected to the cathode current collector 60 through a wire 90 .

[0062] The body 21 may be provided in the form of a square cylinder with an open upper portion. Since the anode 30 and the body 21 are in contact with each other through four sides, the contact area therebetween is relatively wide. Therefore, the ionization area of ​​the anode 30 may be increased, and the current density of the battery may be increased.

[0063] The body 21 may include a plurality of through holes 213 formed therethrough and having a predetermined shape. The anode electrolyte A may flow into and out of the body 21 via the through holes 213. Figure 3-Figure 7 The through hole 213 formed in a shape extending in the length direction of the body 21 is shown, but the through hole 213 is not limited thereto and may have any shape as long as the anode electrolyte A can smoothly pass through the through hole 213 .

[0064] The anode current collector 20 may further include at least one auxiliary plate 23 inserted into the body 21, such as Figure 4 As shown in . The auxiliary plate 23 may include a plurality of through holes 213 formed therethrough and having a predetermined shape. When current and hydrogen are generated in the metal aqueous battery, ionization of the anode 30 occurs on the contact surface between the anode 30 and the anode current collector 20. The non-contact surface between the anode 30 and the anode current collector 20 acts as a dead zone, and the surface of the anode 30 is oxidized on the non-contact surface and residues are generated. When the auxiliary plate 23 is inserted into the body 21, the formation of the dead zone can be prevented. Therefore, the generation of residues can be reduced, and the battery performance can be improved.

[0065] Figure 5 An anode current collector 20 according to a second embodiment of the present disclosure is shown. Figure 6 An anode current collector 20 according to a third embodiment of the present disclosure is shown. Figure 7 An anode current collector 20 according to a fourth embodiment of the present disclosure is shown. Referring to these figures, the anode current collector 20 may include a first plate portion 211 located close to the separator 40 and may include a second plate portion 212 facing the first plate portion 211. At least one of the first plate portion 211 or the second plate portion 212 may have an inclined shape from top to bottom. Figure 5 It is shown that the first electrode portion 211 is provided in an inclined shape. Figure 6 The second plate portion 212 is shown to be provided in an inclined shape, and Figure 7 It is shown that the first electrode plate portion 211 and the second electrode plate portion 212 are provided in an inclined shape.

[0066] Based on the distance between the first electrode plate portion 211 and the diaphragm 40, there may be a difference in the resistance of the anode electrolyte A between the types. An appropriate type of anode current collector 20 may be selected based on the specifications of the metal aqueous battery, etc. In addition, since the space accommodating the anode 30 tends to become narrower toward the bottom, when the anode 30 is ionized and its size is reduced, the anode 30 is stacked from the bottom. Therefore, the contact area between the anode 30 and the anode current collector 20 increases, and thus the ionization of the anode 30 can occur more easily.

[0067] Figure 8 Flow of electrolyte in the metal aqueous battery according to the present disclosure is shown. Anode electrolyte A flows into the electrode plate 10 from the lower surface and side of the electrode plate 10, and is discharged from the upper part of the electrode plate 10. Because the anode current collector 20 is in the form of a container, the anode electrolyte A can be provided as described above so that the anode electrolyte A can flow into the anode current collector 20 through all its surfaces. The cathode electrolyte B can flow into the metal aqueous battery from its lower part, and can be discharged to the outside from the upper part of the metal aqueous battery.

[0068] Anode 30 may include any material that can be ionized in anode electrolyte A to generate electrons, for example, at least one selected from the group consisting of lithium (Li), sodium (Na), magnesium (Mg), zinc (Zn), aluminum (Al), and combinations thereof. In one embodiment, anode 30 may include at least one selected from the group consisting of magnesium (Mg), zinc (Zn), aluminum (Al), and combinations thereof. Magnesium (Mg), zinc (Zn), and aluminum (Al) are stable in water and therefore may be desirable in aqueous systems. In another embodiment, anode 30 may include at least one selected from the group consisting of zinc (Zn), aluminum (Al), and combinations thereof. Considering global reserves and prices, zinc (Zn) and aluminum (Al) may be more desirable.

[0069] The anode 30 may have the form of a pellet, such as a spherical pellet, an oval pellet or a cylindrical pellet. When the anode 30 is configured as an oval pellet, the size of the anode 30 is the length of the major axis of the pellet. When the anode 30 is configured as a cylindrical pellet, the size of the anode 30 is the bottom diameter of the pellet. The diameter of the anode 30 may be 1 mm to 10 mm. When the diameter of the anode 30 is less than 1 mm, the size of the anode 30 is reduced due to ionization, so the anode 30 can pass through the through hole 213. When the diameter of the anode 30 exceeds 10 mm, the specific surface area of ​​the anode 30 is reduced, so the performance of the metal aqueous battery may deteriorate.

[0070] The metal aqueous battery may further include a membrane spacer 80. The membrane spacer 80 is interposed between the electrode plate 10 and the separator 40, has a specified thickness, and is provided in the form of a frame having a hole in the center thereof.

[0071] The membrane spacer 80 may support the edge of the membrane 40 so that the inner space 15 of the electrode plate 10 is expanded by the thickness of the membrane spacer 80. The thickness of the membrane spacer 80 is not particularly limited, and may be 5 mm to 20 mm.

[0072] The separator 40 may include a material having cation conductivity. For example, the separator 40 may include a perfluorosulfonic acid resin such as Nafion. Therefore, the separator 40 may allow cations to migrate between the anode 30 and the cathode 50, but may block the anode electrolyte A and the cathode electrolyte B from moving between the anode 30 and the cathode 50.

[0073] The separator 40 may include a material having anionic conductivity. For example, the separator 40 may include at least one selected from the group consisting of poly(triphenylene), 1,4-diazabicyclo[2,2,2]octane-poly(ethersulfone), poly(arylpiperidinium), poly(phenylene oxide)-block-poly(vinylbenzyltrimethylammonium), and combinations thereof. Therefore, the separator 40 may allow anions to migrate between the anode 30 and the cathode 50, but may prevent the anode electrolyte A and the cathode electrolyte B from moving between the anode 30 and the cathode 50.

[0074] The thickness of the separator 40 is not particularly limited, and may be, for example, 25 μm to 250 μm.

[0075] Fig. 9 A cathode separator 70 according to the present disclosure is shown. The cathode separator 70 may be interposed between the separator 40 and the cathode 50. The cathode separator 70 may be provided in the form of a frame having a hole in a central portion thereof, and the cathode separator 70 may support an edge of the separator 40 to form a gap G between the separator 40 and the cathode 50. The thickness of the cathode separator 70 may be 5 mm to 20 mm.

[0076] The cathode separator 70 may include a material that does not react with the cathode electrolyte B and has chemical resistance. For example, the cathode separator 70 may include polycarbonate.

[0077] The cathode separator 70 may include a cathode electrolyte inlet 71 formed through a portion of one side surface of the cathode separator 70 so as to communicate with the gap G. The cathode separator 70 may also include a cathode electrolyte outlet 72 formed through a portion of the other side surface of the cathode separator 70 at a position spaced a specified distance from the cathode electrolyte inlet 71 so as to communicate with the gap G. For example, based on Fig. 9 , the cathode electrolyte inlet 71 may exist in the lower side surface of the cathode separator 70, and the cathode electrolyte outlet 72 may exist in the upper side surface of the cathode separator 70. In addition, the cathode separator 70 may include a plurality of cathode electrolyte inlets 71 and a plurality of cathode electrolyte outlets 72.

[0078] The cathode 50 may include a noble metal catalyst supported on a carrier. The carrier is not limited to a specific type and may include, for example, at least one selected from the group consisting of carbon paper, carbon fiber, carbon felt, carbon black, carbon cloth, metal foam, metal film, and a combination thereof. The noble metal catalyst is not limited to a specific type and may include, for example, platinum (Pt).

[0079] The anode catalyst A may include an alkali metal hydroxide. In one embodiment, the anode catalyst A may include at least one selected from the group consisting of potassium hydroxide (KOH), sodium hydroxide (NaOH), and a combination thereof.

[0080] The concentration of the anode electrolyte A can be 3M to 6M. When the concentration of the anode electrolyte A is 6M, potassium ions (K + ) or sodium ion (Na + ) is a saturated solution of the anode electrolyte A, and when the concentration of the anode electrolyte A is less than 3M, the ionization of the metal may be insufficient, so the concentration of the anode electrolyte A may appropriately be 3M to 6M.

[0081] The temperature of the anode electrolyte A may be 40° C. to 80° C. When the temperature of the anode electrolyte A is lower than 40° C., it may be difficult to obtain the effect of preventing the anode 30 from being passivated.

[0082] The cathode electrolyte B may include hydrogen ions and bicarbonate ions. In one embodiment, the cathode electrolyte B may include a cation selected from potassium bicarbonate (KHCO 3 ), sodium bicarbonate (NaHCO 3 ) and at least one of the group consisting of ) and combinations thereof.

[0083] The concentration of the cathode electrolyte B may be 0.5 M to 3 M. When the concentration of the cathode electrolyte B is less than 0.5 M, the concentration of the cathode electrolyte B may affect the reaction rate due to an increase in pH, and potassium ions (K + ) or sodium ion (Na + ). Therefore, the corresponding range may be suitable.

[0084] The temperature of the cathode electrolyte B may be 40° C. to 80° C. When the temperature of the cathode electrolyte B is within the above range, the resistance of the metal aqueous battery may be reduced, and the occurrence of overvoltage may be prevented.

[0085] Hereinafter, an operation method of the metal aqueous battery according to the present disclosure is described.

[0086] Anode electrolyte A flows into the inner space 15 of the electrode plate 10 through the first anode electrolyte inlet 16 and the second anode electrolyte inlet 17 .

[0087] When the anode 30 contacts the anode electrolyte A, the anode 30 is ionized, thereby generating electrons. The electrons migrate along the anode current collector 20 and the lead 90 to the cathode current collector 60 , and then are transferred to the cathode 50 .

[0088] The alkali metal ions (e.g., potassium ions (K + ) or sodium ion (Na+ )) moves through the diaphragm 40 to the cathode 50.

[0089] Cathode electrolyte B and carbon dioxide are supplied to cathode 50 through cathode electrolyte inlet 71. At cathode 50, a chemical elution reaction of carbon dioxide occurs as follows.

[0090] CO 2 (g)+H 2 O(l)→H + (aq)+HCO 3 - (aq)

[0091] Thereafter, at the cathode 50, a hydrogen generation reaction occurs as follows.

[0092] 2H + (aq)+2e - →H 2 (g)

[0093] Furthermore, at the cathode 50, carbon dioxide is stored in the form of salt as follows.

[0094] HCO 3 - (aq)+K + (aq)→KHCO 3 (g)

[0095] HCO 3 - (aq)+Na + (aq)→NaHCO 3 (g)

[0096] H 2 and KHCO 3 (or NaHCO 3 ) is discharged to the outside of the battery together with the cathode electrolyte B through the cathode electrolyte outlet 72.

[0097] Hereinafter, other embodiments of the present disclosure are described in more detail through the following examples and comparative examples. The following examples and comparative examples are only used to exemplify the present disclosure and are not intended to limit the scope and spirit of the present disclosure.

[0098] Example 1

[0099] like Figure 1 As shown, the battery performance of the dual-battery DC is evaluated by operating the dual-battery DC. Fig.10As shown, a bi-cell DC using a flat plate-shaped anode current collector 20' instead of the container-shaped current collector 20 used in the present disclosure was applied and set as a comparative example. Zinc pellets having an average diameter of 2 mm to 4 mm were used as the anode 30, and 6M potassium hydroxide (KOH) was used as the anode electrolyte. The performance evaluation results of the corresponding bi-cell DC are shown in FIG. Fig.11 Referring to this, it can be seen that the metal aqueous battery according to the present disclosure shows more stable high performance.

[0100] Examples 2 to 4

[0101] In Example 2, the production process is as follows: Figure 3 In Example 3, a metal aqueous battery using a square cylindrical anode current collector is manufactured. Figure 5 In Example 4, a metal aqueous battery using a tilted anode current collector is manufactured. Figure 6 The metal aqueous battery with the inclined anode collector shown in . The battery performance of the metal aqueous battery according to Examples 2 to 4 was evaluated. The performance evaluation results of the corresponding metal aqueous battery are shown in Fig.12 Referring to this, it can be seen that the metal aqueous batteries according to Examples 2 to 4 are stably operated, and in particular, the metal aqueous battery according to Example 4 shows the highest battery performance due to the smooth flow of the anode electrolyte.

[0102] As is apparent from the above description, according to the present disclosure, a metal aqueous battery having improved current generation amount and current generation rate can be obtained.

[0103] According to the present disclosure, a metal aqueous battery in which an electrolyte can be smoothly circulated can be obtained.

[0104] The effects of the present disclosure are not limited to the above-mentioned effects. The effects of the present disclosure should be understood to include all the effects that can be inferred from the above description.

[0105] The present disclosure has been described in detail with reference to the embodiments of the present disclosure. However, it will be appreciated by those skilled in the art that these embodiments may be modified without departing from the principles and spirit of the present disclosure, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A metal aqueous battery, comprising a bicell comprising a pair of single cells, each single cell comprising: anode; cathode; a separator, disposed between the anode and the cathode; a plate including an inner space configured to accommodate the anode, wherein the inner space of the plate communicates with the outside via an opening formed in one surface of the plate; and an anode current collector located in the internal space, wherein the anode current collector includes a body having a container shape, the body having an open upper portion and a closed bottom surface to accommodate the anode, wherein the pair of cells are stacked so that the cathodes face each other, and The cathode current collector is interposed between the pair of single cells.

2. The metal aqueous battery according to claim 1, wherein: The electrode plate is provided in the form of a tube, the tube comprising a lower surface, a front surface configured to be at least partially open, a rear surface configured to face the front surface, and a side surface configured to connect the front surface and the rear surface, and The plate includes a first anolyte inlet formed in one region of the lower surface, a second anolyte inlet formed in some regions of the rear surface, and an anolyte outlet formed in an upper portion of the side surface.

3. The metal aqueous battery according to claim 1, wherein: The anode current collector further includes an extension portion having a shape of a panel configured to extend upward from the body, and The extension portion is exposed to the outside of the electrode plate and is connected to the cathode current collector through a wire. 4 . The metal aqueous battery according to claim 1 , wherein the body is in the form of a square cylinder having an open upper portion.

5. The metal aqueous battery according to claim 1, wherein the body comprises: A first electrode portion, arranged close to the diaphragm; as well as A second electrode portion is configured to face the first electrode portion, At least one of the first electrode plate portion or the second electrode plate portion of the body has an inclined shape from top to bottom.

6. The metal aqueous battery according to claim 1, wherein: The body includes a plurality of through holes formed through the body and having a predetermined shape, and Anode electrolyte passes through the body via the plurality of through holes.

7. The metal aqueous battery according to claim 1, wherein: The anode current collector further includes at least one auxiliary plate inserted into the body, and The auxiliary plate includes a plurality of through holes formed through the auxiliary plate and having a predetermined shape. The metallic aqueous battery according to claim 1 , wherein the anode has a pellet form. 9 . The metal aqueous battery according to claim 1 , wherein the average diameter of the anode is 1 mm to 10 mm. 10 . The metallic aqueous battery according to claim 1 , wherein the anode comprises at least one selected from the group consisting of lithium (Li), sodium (Na), magnesium (Mg), zinc (Zn), aluminum (Al), and combinations thereof.

11. The metallic aqueous battery according to claim 1, wherein the cathode comprises a noble metal catalyst supported on a carrier. 12 . The metal aqueous battery according to claim 1 , wherein each unit cell further comprises a cathode separator interposed between the separator and the cathode to form a gap between the separator and the cathode.

13. The metal aqueous battery according to claim 12, wherein: The cathode spacer is provided in the form of a frame having a hole in a central portion of the frame, and the cathode spacer supports an edge of the diaphragm to form the gap, and The cathode spacer comprises: a cathode electrolyte inlet formed through a portion of one side surface of the cathode separator so as to communicate with the gap; and A cathode electrolyte outlet is formed through a portion of the other side surface of the cathode separator at a position spaced a specified distance from the cathode electrolyte inlet so as to communicate with the gap.

14. The metal aqueous battery according to claim 1, further comprising a diaphragm spacer interposed between the electrode plate and the diaphragm, the diaphragm spacer having a specified thickness and provided in the form of a frame, the frame having a hole in a central portion of the frame, The diaphragm spacer supports the edge of the diaphragm so that the inner space of the electrode plate is expanded by the thickness of the diaphragm spacer.

15. The metal aqueous battery according to claim 1, further comprising: an anolyte contained in a space between the anode and the separator; as well as A cathode electrolyte is accommodated in a space between the cathode and the separator.

16. The metallic aqueous battery of claim 15, wherein the anode electrolyte comprises an alkali metal hydroxide.

17. The metallic aqueous battery of claim 15, wherein the cathode electrolyte comprises hydrogen ions and bicarbonate ions.

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