Low-cost high-performance air electrode and air battery

Abstract

The air electrode comprises an active layer, a waterproof layer and a metal net, the active layer is compounded on a first surface of the waterproof layer, and the metal net is embedded into the waterproof layer. The waterproof layer of the air electrode is made of waterproof, breathable and conductive materials, and the metal net is embedded in the waterproof layer of the air electrode, so that the conductivity of the large-area air electrode can be remarkably improved. Besides, the metal net is embedded in the waterproof layer, and the metal net does not penetrate through the first surface of the waterproof layer and does not make direct contact with the active layer, so that the metal net can be effectively protected by means of the waterproofness of the waterproof layer, it is ensured that the metal net does not make contact with electrolyte in the battery, and therefore the metal net can be a low-cost metal net such as a nickel-plated steel net, and the service life of the battery is prolonged. And the cost of the air electrode can be reduced while the conductivity and the high performance of the large-area air electrode are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to air battery technical field, concretely relates to a low -cost high -performance air electrode and air battery. BACKGROUND

[0002] Some air electrodes in prior art only include waterproof layer and active layer, and the air electrode required by button type zinc air battery PR44, PR48 and the like has an area generally lower than 1 square centimeter, and the conductivity is not a problem, and the requirement of battery performance can be completely met. However, the air electrode required by square air battery and the like has a large area, and the conductivity is insufficient. Some air electrodes further have a metal mesh arranged between the waterproof layer and the active layer to improve the conductivity of the air electrode. However, the active layer of the air electrode is in direct contact with the metal mesh, and when applied to a battery, the waterproof layer seals electrolyte, and the active layer and the metal mesh are both immersed in the electrolyte. Since the electrolyte is corrosive, the metal mesh can only be made of pure nickel, gold-plated pure nickel or other metals with high corrosion resistance, thereby increasing the cost of the air electrode and the air battery. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a low-cost high-performance air electrode, which can improve the conductivity of a large-area air electrode and reduce the cost of the air electrode.

[0004] To solve the above problems, the utility model adopts the following technical scheme: a low-cost high-performance air electrode, comprising an active layer, a waterproof layer and a metal mesh, the active layer is composite in the first surface of the waterproof layer, the metal mesh is embedded in the waterproof layer, and the metal mesh does not penetrate the first surface of the waterproof layer.

[0005] Compared with the prior art, the utility model has the beneficial effects that: the air electrode of the utility model has a metal mesh embedded in the waterproof layer, which can significantly improve the conductivity of a large-area air electrode. In addition, the air electrode of the utility model has a metal mesh embedded in the waterproof layer, and the metal mesh does not penetrate the first surface of the waterproof layer, so that the waterproof property of the waterproof layer can be utilized to effectively protect the metal mesh and ensure that the metal mesh does not come into contact with the electrolyte inside the battery. Therefore, the metal mesh can be a nickel-plated steel mesh or other low-cost metal mesh, which can ensure the conductivity and high performance of the large-area air electrode while reducing the cost of the air electrode. Therefore, the air electrode of the utility model has the advantages of low cost and high performance.

[0006] The low-cost high-performance air electrode has a metal mesh embedded in the waterproof layer to a depth not less than 50% of the thickness of the metal mesh.

[0007] The low-cost high-performance air electrode has a metal mesh completely embedded in the waterproof layer.

[0008] The low-cost high-performance air electrode has the metal mesh located in the middle of the waterproof layer.

[0009] The low-cost high-performance air electrode has the metal mesh located in the middle of the waterproof layer.

[0010] The utility model discloses still provide a kind of air battery, comprising the low-cost high-performance air electrode of above-mentioned. Since the air battery adopts the air electrode described above, it at least has all the beneficial effects that the air electrode described above can bring.

[0011] The utility model will be further described in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the partial structure schematic view of the air electrode of the utility model embodiment one;

[0013] Figure 2 It is the structure schematic view of the air battery of the utility model embodiment two;

[0014] Figure 3 It is the structure schematic view of the air battery of the utility model embodiment three.

[0015] Reference Signs List: 100 air electrode, 110 active layer, 120 waterproof layer, 121 first surface, 122 second surface, 130 metal mesh, 200 bottom shell, 210 air hole, 300 negative electrode cover, 400 rubber ring, 500 anode mixture, 600 air layer, 700 diaphragm, 800 insulating shell, 900 negative electrode lead-out strip, 1000 cavity. DETAILED DESCRIPTION

[0016] The embodiments of the utility model will be described in detail as follows:

[0017] Embodiment one

[0018] Reference Figure 1The embodiment of the utility model provides a low -cost high -performance air electrode 100, including active layer 110, waterproof layer 120 and metal net 130, active layer 110 is compounded in waterproof layer 120's first surface 121, metal net 130 is embedded waterproof layer 120, and metal net 130 does not penetrate waterproof layer 120's first surface 121, does not directly contact with active layer 110. The waterproof layer 120 of this air electrode 100 is made of waterproof, breathable, conductive material, and the air electrode 100 in waterproof layer 120 is embedded with metal net 130, can significantly improve the conductivity of large-area air electrode 100. In addition, the air electrode 100 embeds metal net 130 in waterproof layer 120, and metal net 130 does not penetrate the first surface 121 of waterproof layer 120, so that the waterproof property of waterproof layer 120 can be used to effectively protect metal net 130, ensure that metal net 130 does not contact the electrolyte in the battery, therefore metal net 130 can adopt nickel-plated steel mesh and other low -cost metal net, while guaranteeing the conductivity and high performance of large-area air electrode 100, air electrode 100's cost can also be reduced. Therefore, the air electrode 100 has the advantages of low cost and high performance.

[0019] Further, the depth of the metal net 130 embedded in the waterproof layer 120 is not less than 50% of the thickness of the metal net 130, which can ensure the performance of the air electrode 100, reduce the cost of the air electrode 100, and make the fixation of the metal net 130 more reliable and not easy to fall off. In some embodiments, the metal net 130 is completely embedded in the waterproof layer 120. In some embodiments, the metal net 130 is completely embedded in the waterproof layer 120, and the metal net 130 is located in the middle of the waterproof layer 120. In some embodiments, the metal net 130 is completely embedded in the waterproof layer 120, and the metal net 130 is closer to the second surface 122 of the waterproof layer 120, wherein the first surface 121 and the second surface 122 are two oppositely arranged surfaces of the waterproof layer 120. Further, as shown in Figure 1 the first surface 121 of the waterproof layer 120 is the upper surface, and the second surface 122 of the waterproof layer 120 is the lower surface.

[0020] Further, the active layer 110 and the waterproof layer 120 can adopt the active layer and the waterproof layer disclosed in the Chinese invention patent application with the application number of “2022111816380”. When preparing the air electrode 100, the waterproof layer 120 and the metal mesh 130 can be hot-pressed together first. When hot-pressed, the metal mesh 130 can be completely embedded in the waterproof layer 120, or can be partially embedded in the waterproof layer 120, but the embedding depth is not less than 50% of the thickness of the metal mesh 130. After the hot-pressing is completed, the waterproof layer 120 can still maintain good waterproofness, and the metal mesh 130 does not penetrate the first surface 121 of the waterproof layer 120. Then, the active layer 110 is combined on the first surface 121 of the waterproof layer 120. Finally, the foaming agent is removed by the extraction liquid.

[0021] Embodiment two

[0022] With reference to Figure 2 Embodiment two of the utility model provides an air battery, comprising the low-cost high-performance air electrode 100 described above. Since the air battery adopts the air electrode 100 described above, it at least has all the beneficial effects that the air electrode 100 described above can bring.

[0023] Further, with reference to Figure 2 The air battery comprises a bottom shell 200, a negative electrode cover 300, a rubber ring 400, an anode mixture 500, an air-permeable layer 600, a diaphragm 700, and the air electrode 100 described above. Among them, the active layer 110 and the waterproof layer 120 in the air electrode 100 are distributed from top to bottom, and the metal mesh 130 is embedded in the waterproof layer 120. The air-permeable layer 600 and the air electrode 100 are both arranged on the inner bottom of the bottom shell 200, and the air-permeable layer 600 is located below the air electrode 100, more specifically, below the waterproof layer 120. The bottom of the bottom shell 200 is also provided with a gas-permeable hole 210 to facilitate air permeation with the air-permeable layer 600. The diaphragm 700 is arranged on the top surface of the air electrode 100, more specifically, on the top surface of the active layer 110, between the anode mixture 500 and the air electrode 100. The negative electrode cover 300 is sealingly inserted into the upper part of the bottom shell 200, and the rubber ring 400 is sealingly connected between the bottom shell 200, the negative electrode cover 300, and the diaphragm 700. Among them, the outer side of the rubber ring 400 is sealingly connected to the inner side of the bottom shell 200, the inner side of the rubber ring 400 is sealingly connected to the outer side of the negative electrode cover 300, and the bottom side of the rubber ring 400 is sealingly connected to the top side of the diaphragm 700. The anode mixture 500 is arranged in the cavity 1000 surrounded by the negative electrode cover 300, the rubber ring 400, and the diaphragm 700. Among them, the anode mixture 500, as the negative electrode of the battery, is mixed from metal powder, additives, and electrolyte. The positive electrode of the battery is composed of the diaphragm 700 and the air electrode 100.

[0024] Embodiment three

[0025] With reference to Figure 3 The third embodiment of the utility model provides an air battery, comprising the low cost high performance air electrode 100. Since the air battery adopts the air electrode 100, it has all the beneficial effects brought by the air electrode 100.

[0026] Further, with reference to Figure 3 The air electrode 100 comprises a bottom shell 200, an insulating shell 800, a negative electrode lead-out strip 900, an anode mixture 500, an air-permeable layer 600, a diaphragm 700 and the air electrode 100. The active layer 110 and the waterproof layer 120 in the air electrode 100 are distributed from top to bottom, and the metal mesh 130 is embedded in the waterproof layer 120. The bottom shell 200 can serve as the positive electrode lead-out part of the battery, and the air-permeable layer 600 and the air electrode 100 are both arranged on the inner bottom of the bottom shell 200, and the air-permeable layer 600 is below the air electrode 100, more specifically, below the waterproof layer 120. The bottom of the bottom shell 200 is also provided with a gas-permeable hole 210 to facilitate air permeation in cooperation with the air-permeable layer 600. The insulating shell 800 is sealingly inserted into the upper part of the bottom shell 200, and the diaphragm 700 is arranged on the top surface of the air electrode 100, more specifically, on the top surface of the active layer 110. The anode mixture 500 is arranged in a cavity 1000 formed by the insulating shell 800 and the diaphragm 700, and the diaphragm 700 is located between the anode mixture 500 and the air electrode 100. One end of the negative electrode lead-out strip 900 is inserted into the anode mixture 500, and the other end extends out of the insulating shell 800. The anode mixture 500 is mixed by metal powder, additives and electrolyte and serves as the negative electrode of the battery. The positive electrode of the battery is composed of the diaphragm 700 and the air electrode 100.

[0027] It should be noted that, in the description of the utility model, if there is any reference to the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, it is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the utility model.

[0028] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two and two or more, greater than, less than, more than and the like are not included in the number, above, below and the like are included in the number. If there is a description of the first or second and the like, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A low-cost, high-performance air electrode, characterized in that, The device includes an active layer (110), a waterproof layer (120), and a metal mesh (130). The active layer (110) is laminated to the first surface (121) of the waterproof layer (120). The metal mesh (130) is embedded in the waterproof layer (120) and does not penetrate the first surface (121) of the waterproof layer (120). The depth to which the metal mesh (130) is embedded in the waterproof layer (120) is not less than 50% of the thickness of the metal mesh (130).

2. The low-cost, high-performance air electrode according to claim 1, characterized in that, The metal mesh (130) is completely embedded in the waterproof layer (120).

3. The low-cost, high-performance air electrode according to claim 2, characterized in that, The metal mesh (130) is located in the middle of the waterproof layer (120).

4. The low-cost, high-performance air electrode according to claim 2, characterized in that, The metal mesh (130) is closer to the second surface (122) of the waterproof layer (120), wherein the first surface (121) and the second surface (122) are two opposing surfaces of the waterproof layer (120).

5. An air battery, characterized in that, Including the low-cost, high-performance air electrode (100) as described in any one of claims 1-4.

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