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US 2013/0157167 A1Published application
Alternate material for electrode topcoat
AssigneeGM Global Technology Operations LLC
InventorsScott L. Peters, Amit Nayar, Ruichun Jiang
Life of this patent
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Abstract
A reduced gas crossover fuel cell membrane and method of making. The fuel cell member includes an electrode layer with a catalyst and an electrochemically-active first ionomer and an overcoat layer disposed on the electrode layer. The overcoat layer is made of the same or different second ionomer relative to the first ionomer of the electrode layer with at least one reduced gas crossover characteristic.
Claims27
A fuel cell electrode comprising:
- a proton-conductive substrate;
- an electrode layer coupled to said substrate, said electrode layer comprising a catalyst and an electrochemically-active first ionomer;
- and
- an overcoat layer disposed on said electrode layer, said overcoat layer comprising a second ionomer with at least one reduced gas crossover characteristic relative to said first ionomer.
1 more element
A membrane electrode assembly comprising:
- a proton-conductive membrane;
- and
- a plurality of electrodes coupled to said membrane, each of said plurality of electrodes comprising:
- an electrode layer comprising a catalyst and an electrochemically-active first ionomer;
- and
- an overcoat layer disposed on said electrode layer, said overcoat layer comprising a second ionomer with at least one reduced gas crossover characteristic relative to said first ionomer.
3 more elements
A method of fabricating a fuel cell electrode comprising:
- coupling an electrode layer comprising a catalyst and an electrochemically-active first ionomer to a substrate;
- and
- placing an overcoat layer disposed on said electrode layer, said overcoat layer comprising a second ionomer with at least one reduced gas crossover characteristic relative to said first ionomer.
Dependencies are inferred from the claim text.