Membrane electrode assemblies for fuel cells and methods of...

H - Electricity – 01 – M

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H01M 8/02 (2006.01) H01M 4/86 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2691792

A sealed unbonded membrane electrode assembly includes a first gas diffusion layer and a second gas diffusion layer each having a peripheral border and an active region a catalyst coated membrane, having an active region, interposed between the first gas diffusion layer and the second gas diffusion layer; and a frame member; wherein the frame member envelops the peripheral border of the first gas diffusion layer and the second gas diffusion layer and is sealed to the catalyst-coated membrane; and wherein the catalyst-coated membrane is unbonded to the first and second gas diffusion layers in the active regions thereof.

L'invention concerne un ensemble d'électrode de membrane non lié scellé qui comprend une première couche de diffusion de gaz et une seconde couche de diffusion de gaz ayant chacune une limite périphérique et une région active d'une membrane revêtue de catalyseur, ayant une région active, interposée entre la première couche de diffusion de gaz et la seconde couche de diffusion de gaz ; et un élément de cadre ; où l'élément de cadre enveloppe la limite périphérique de la première couche de diffusion de gaz et la seconde couche de diffusion de gaz et est scellé sur la membrane revêtue de catalyseur ; et où la membrane revêtue de catalyseur est non liée aux première et seconde couches de diffusion de gaz dans les régions actives de celle-ci.

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