Material for gaseous diffusion electrode

Details Material for gaseous diffusion electrode Material for gaseous diffusion electrode

1985-01-30

1986-03-18

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264127, 4283155, 4283179, 428422, B32B 326, B32B 530, B32B 532

Patent

active

045768617

ABSTRACT:
A material for use as a gaseous diffusion electrode is provided. The material has improved durability resulting in long life. the material comprises a composite of a first layer of polytetrafluoroethylene (PTFE) containing a filler of a powdered electroconductive substance and a second layer of PTFE in bonded laminar contact with the first layer. The second layer preferably contains no electroconductive filler. The first and second layers are bonded together under pressure to form an intermediate composite and this intermediate composite is stretched, to produce the material of the invention which is a composite layered product of expanded PTFE having nodes interconnected by fibrils, one layer containing electroconductive material and the second layer preferably containing no electroconductive material. A catalytic substance can be incorporated onto or into at least the first layer by either deposition or by a filler of catalytic powder for use as the gas diffusing electrode of the invention.

REFERENCES:
patent: 3953566 (1976-04-01), Gore
patent: 4385093 (1983-05-01), Hubis
patent: 4386987 (1983-06-01), Covitch et al.
patent: 4539256 (1985-09-01), Shipman

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