Positive electrode for zinc-air battery and its manufacturing method

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...

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