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Positive electrode for zinc-air battery and its manufacturing method

A technology of air battery and manufacturing method, applied to battery electrodes, fuel cell half-cells, primary battery-type half-cells, circuits, etc., can solve the problems of complex process, expensive price, high cost of raw materials, etc., and achieve simplified preparation process , change the crystal phase structure and particle size, and improve the effect of discharge current density

Inactive Publication Date: 2006-02-22
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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Problems solved by technology

The carrier in the catalytic layer is activated carbon, the conductive agent is colloidal graphite, the current collector is metal nickel or copper, and the catalyst is added with precious metals such as silver and platinum. This kind of positive electrode has high catalytic activity, but the cost of raw materials is also high, and the process is relatively expensive. complex

Method used

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  • Positive electrode for zinc-air battery and its manufacturing method

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Embodiment 1

[0025] Refer to attached figure 1 , the structure of the positive electrode for the zinc-air battery is waterproof layer 1; catalytic layer 2; current collector 3.

[0026] A method for manufacturing positive electrodes for zinc-air batteries. According to different types of batteries, use a shearing machine to cut iron nets into electrode sizes determined by battery specifications, and then put hydrochloric acid and distilled water with a volume ratio of 1:1 Remove oil and rust in the diluted hydrochloric acid, take out the iron grid and immerse it in the mixed solution of nickel sulfate and sodium hypophosphite with a volume ratio of 1:1, carry out electroless nickel plating on the iron grid, take it out and dry it Standby as current collector 3; put the electrolytic manganese dioxide into the oven, adjust the temperature of the oven to 340°C-400°C for 15 hours, take it out and grind it into 200-400-mesh manganese dioxide powder with a mortar as a catalyst; The agitator sti...

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Abstract

The invention relates to a positive electrode of zinc-air battery and its manufacturing method. Said positive electrode comprises a catalytic layer (2) mixed by polytetrafluoroethylene emulsion and the mixture which uses industrial alcohol to infiltrate carrier, conductor, and catalytic agent; a flow collector (3) and a waterproof layer (1), wherein, said catalytic agent is electrolytic manganese dioxide material. Since the conductor selects expansible graphite and the flow collector (3) selects nickel-plated iron net, the surface of material is increased more than 400 % to improve the ability of absorbing oxygen of electrode, and the conductivity of material is increased 40 % to improve the discharging current density and reduce the cost. The electrolytic manganese dioxide is processed into manganese dioxide powder, to change the crystal phase structure and its particle, so the manufacturing process is simplified.

Description

technical field [0001] The invention belongs to the technical field of converting chemical energy into electric energy, and in particular relates to a positive electrode for a zinc-air battery and a manufacturing method thereof. Background technique [0002] Currently, the positive electrode of a zinc-air battery includes a catalytic layer, a waterproof layer, and a current collector. The carrier in the catalytic layer is activated carbon, the conductive agent is colloidal graphite, the current collector is metal nickel or copper, and the catalyst is added with precious metals such as silver and platinum. This kind of positive electrode has high catalytic activity, but the cost of raw materials is also high, and the process is relatively expensive. complex. Contents of the invention [0003] In order to solve the problems in the prior art, the invention provides a positive electrode for a zinc-air battery and a manufacturing method thereof. [0004] The object of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M12/06
CPCY02E60/50
Inventor 潘凯红张晶杨海
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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