Air electrode and preparation method thereof

An air electrode and mixture technology, applied in the field of electrochemistry, can solve the problems of shortening the battery cycle life, separating the waterproof layer from the catalytic layer, reducing the effective discharge area and reducing the battery discharge capacity and capacity, etc., so as to improve the service life and not easy to separate , the effect of solid connection

Inactive Publication Date: 2013-03-06
北京九能京通新能源科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, during the long-term discharge cycle, if the average cycle time is less than 200 times, the waterproof layer and the catalytic layer on the air electrode will be separated, resulting in a decrease in the effective discharge area of ​​the air electrode and affecting the overall battery discharge capacity and capacity. It also shortens the cycle life of the battery

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  • Air electrode and preparation method thereof
  • Air electrode and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] like figure 1 , figure 2 As shown, the air electrode of this embodiment includes a catalytic layer 1, a first waterproof carbon powder layer 2, a current collector layer 4 and a second waterproof carbon powder layer 5 that are sequentially bonded by thermocompression, and the current collector layer 4 is provided with One lead out the tab 3 .

[0036] The preparation method of the air electrode in this embodiment is as follows:

[0037] a. Preparation of waterproof carbon powder

[0038] 11) Mix acetylene black (Jiaozuo Hexing Chemical Industry Co., Ltd., model: 50% compression acetylene black) with high-density low-pressure polyethylene (the Second Auxiliary Factory of Beijing Dongfang Petrochemical Co., Ltd., model: LD0020 (30 mesh)) Mix with kerosene in a ratio of 7:1:15 by weight;

[0039] 12) Heat the mixture obtained in step 11) to 100°C with a heater, and keep stirring the mixture, stop heating after 1 hour, continue stirring for 20 minutes, and then cool to...

Embodiment 2

[0051] The air electrode of this embodiment includes a catalytic layer 1, a first waterproof carbon powder layer 2, a current collector layer 4 and a second waterproof carbon powder layer 5 that are hot-pressed and bonded in sequence, and the current collector layer 4 is provided with two Lead out the tab 3.

[0052] The preparation method of the air electrode in this embodiment is as follows:

[0053] a. Preparation of waterproof carbon powder

[0054] 11) Mix acetylene black (Jiaozuo Hexing Chemical Industry Co., Ltd., model: 50% compression acetylene black) with high-density low-pressure polyethylene (the Second Auxiliary Factory of Beijing Dongfang Petrochemical Co., Ltd., model: LD0020 (30 mesh)) Mix with kerosene in a ratio of 6:1:20 by weight;

[0055] 12) Heat the mixture obtained in step 11) to 90°C with a heater, and keep stirring the mixture, stop heating after 1 hour, continue stirring for 20 minutes, and then cool to ambient temperature at room temperature;

[...

Embodiment 3

[0067] The air electrode of this embodiment includes a catalytic layer 1, a first waterproof carbon powder layer 2, a current collector layer 4 and a second waterproof carbon powder layer 5 that are hot-pressed and bonded in sequence, and the current collector layer 4 is provided with two Lead out the tab 3.

[0068] The preparation method of the air electrode in this embodiment is as follows:

[0069] a. Preparation of waterproof carbon powder

[0070] 11) Mix acetylene black (Jiaozuo Hexing Chemical Industry Co., Ltd., model: 50% compression acetylene black) with high-density low-pressure polyethylene (the Second Auxiliary Factory of Beijing Dongfang Petrochemical Co., Ltd., model: LD0020 (30 mesh)) Mix with kerosene in a ratio of 8:1:10 by weight;

[0071] 12) Heat the mixture obtained in step 11) to 145°C with a heater, keep stirring the mixture, stop heating after 1 hour, continue stirring for 20 minutes, and then cool to ambient temperature at room temperature;

[007...

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Abstract

The invention discloses an air electrode and a preparation method thereof. The electrode comprises a catalytic layer, a first waterproof carbon powder layer, a current collector layer, and a second waterproof carbon powder layer which are subjected to hot-press fitting. The waterproof carbon powder layers comprise acetylene black and high-density low-pressure polyethylene. The catalytic layer comprises active carbon, acetylene black and high-density low-pressure polyethylene. According to the electrode preparation method, preparation processes of the waterproof carbon powder layers and the catalytic layer are integrated, and a traditional catalytic membrane is changed into catalytic powder. According to the air electrode provided by the invention, the waterproof carbon powder layers are firmly fitted with the catalytic layer. During a long-time discharge cycle, the waterproof carbon powder layers and the catalytic layer can not be easily separated, such that battery circulation service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an air electrode and a preparation method thereof. Background technique [0002] At present, the relatively mature air electrode manufacturing in the process of industrialization of zinc-air batteries is mainly based on hot-pressed air electrodes. The air electrode includes three parts: waterproof layer, catalytic layer and current collector. The waterproof layer is generally synthesized by conductive carbon black and vinyl chloride or resin; the catalytic layer is generally synthesized by catalyst, dispersion liquid, and pore-forming agent, and after the roller mill is heated to 75°C±10°C, the roll is rolled into a film; The current collector is made of metal mesh or foamed metal sheet. Afterwards, the waterproof layer, the current collector, the waterproof layer, and the film-like catalytic layer are overlapped and tiled in order by a heat press to form a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 刘伟春刘鹏飞
Owner 北京九能京通新能源科技有限公司
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