Membrane electrode assembly

H - Electricity – 01 – M

Patent

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Details

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

Patent

CA 2446592

A membrane electrode assembly wherein each gas diffusion substrate (1) comprises a porous electrically conductive sheet material, wherein an integral gasket member (2) is located on the first and second planar faces of a peripheral portion of the sheet material. The electrocatalyst layers (5) are not present adjacent to the gasket members and the edge of the membrane (6) is sandwiched between the gasket members. The invention further relates to integrated cell assemblies and fuel cell stacks comprising membrane electrode assemblies according to the invention.

La présente invention concerne un ensemble d'électrode à membrane dans lequel chaque substrat de diffusion gazeuse comprend un matériau en feuille électroconducteur poreux. Un élément d'étanchéité intégré est situé sur les premières et secondes faces planes d'une partie périphérique du matériau en feuille. Les couches d'électrocatalyseur ne sont pas adjacentes aux éléments d'étanchéité et le bord de la membrane est pris en sandwich entre les éléments d'étanchéité. La présente invention concerne également des ensembles de piles intégrées et des empilements de piles à combustible comprenant des ensembles d'électrode à membrane selon cette invention.

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