Method of making a final cell electrode assembly substrate

Details Method of making a final cell electrode assembly substrate Method of making a final cell electrode assembly substrate

1990-10-22

1991-06-25

Skapars, Anthony

Metal working

Method of mechanical manufacture

Electrical device making

427115, 296231, H01M 600

Patent

active

050264028

ABSTRACT:
A porous substrate of a fuel cell electrode assembly is formed by producing a fibrous carbon precursor web by means of a conventional wet paper-making process. The precursor web is then dried and saturated with a wet resinous binder which will carbonize when heated. Substantially the entirety of all of the carbon fibers in the web are thus coated with the binder, and substantially all of the inter-fiber junctures in the web will also be coated with the binder. The saturated web is then dried, and heat treated to convert the binder to a glassy carbon which exhibits superior resistance to corrosion.

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