Chemistry: electrical current producing apparatus – product – and – Having earth feature
Patent
1988-03-01
1988-11-22
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Having earth feature
429 35, H01M 208
Patent
active
047865687
ABSTRACT:
The edges of a porous substrate plate used in a fuel cell power plant are densified by impregnating a suspension of finely divided material in the interstitial spaces in the plate edges. The suspension, in the form of an "ink" is forced into the plate edges via a pressure differential applied through the plate between two press blocks. The ink is forced into the plate after a catalyst layer has been applied to one surface of the substrate plate. The ink thus penetrates to the inner surface of the catalyst layer, and also forms an integral filler band outwardly of the catalyst layer, which filler band has a top surface which is coplanar with the top surface of the catalyst layer. After the impregnation step, the seals are dried to form a dense low porosity border on the substrate plates which will fill with electrolyte to form a wet seal that prevents gas crossover through the edges of the substrate plates.
REFERENCES:
patent: 3867206 (1975-02-01), Trocciola et al.
patent: 4185145 (1980-01-01), Breault
patent: 4259389 (1981-03-01), Vine et al.
patent: 4365008 (1982-12-01), Decasperis et al.
patent: 4652502 (1987-03-01), Breault et al.
Elmore Dan E.
Roethlein Richard J.
International Fuel Cells Corporation
Jones W. W.
Skapars Anthony
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