Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Making catalytic electrode – process only
Patent
1988-04-15
1989-07-25
Skapars, Anthony
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Making catalytic electrode, process only
427115, 296235, H01M 488
Patent
active
048513776
ABSTRACT:
A fuel cell electrode having a non-uniform catalyst loading is disclosed. The electrode has a layer of a hydrophobic polymer and a platinum or platinum alloy catalyst supported on the surface of a porous substrate. The thickness of the layer increases along one axis of the surface so that the electrode has a catalyst loading that increases along the one axis of the surface. A process for making such an electrode having steps of contacting the upper surface of a porous substrate with a mixture of a hydrophobic polymer and a carbon supported catalyst, and establishing a reduced pressure distribution along the lower surface of the porous substrate to cause the catalyst mixture to be deposited as a non-uniform layer on the upper surface of the substrate. A fuel cell utilizing such an electrode is also disclosed.
REFERENCES:
patent: 3857737 (1974-12-01), Kemp et al.
patent: 4175055 (1979-11-01), Goller et al.
patent: 4233181 (1980-11-01), Goller et al.
patent: 4287232 (1981-09-01), Goller et al.
International Fuel Cells Corporation
McVeigh Kevin E.
Skapars Anthony
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