Air cathode structure manufacture

Details Air cathode structure manufacture Air cathode structure manufacture

1983-03-11

1985-04-30

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 29, 429 41, H01M 1204

Patent

active

045144745

ABSTRACT:
An improved air cathode structure for use in primary batteries and the like. The cathode structure includes a matrix active layer, a current collector grid on one face of the matrix active layer, and a porous, nonelectrically conductive separator on the opposite face of the matrix active layer, the collector grid and separator being permanently bonded to the matrix active layer. The separator has a preselected porosity providing low IR losses and high resistance to air flow through the matrix active layer to maintain high bubble pressure during operation of the battery. In the illustrated embodiment, the separator was formed of porous polypropylene. A thin hydrophobic film is provided, in the preferred embodiment, on the current collecting metal grid.

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patent: 4389466 (1983-06-01), Joy

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