Active layer for membrane electrode assembly

Details Active layer for membrane electrode assembly Active layer for membrane electrode assembly

1997-03-07

1999-03-16

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 30, 429 40, 429 41, 429 42, 204282, 204296, H01M 810

Patent

active

058828109

ABSTRACT:
Described is a membrane electrode assembly having an ion exchange membrane, and at least two active layers positioned on the same side of the membrane; wherein the active layers containing catalytically-active particles and an ionomer; the average equivalent weights of the ionomers in the layers differ by at least 50; and the active layer positioned closest to the membrane contains the ionomer with the lower average equivalent weight. This membrane electrode assembly, when utilized in a fuel cell, provides a relatively high voltage at a given current density and gas flow rate.

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