Porous fuel cell electrode structures having conformal...

H - Electricity – 01 – M

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H01M 4/86 (2006.01) H01M 4/88 (2006.01) H01M 4/90 (2006.01) H01M 4/92 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2472232

The present invention discloses porous fuel cell electrode structures, assemblies, and systems having one or more conformal metallic layers selectively deposited on one or more pore surfaces, as well as to various methods relating thereto. In one embodiment,the present invention is directed to an electrode structure for a fuel cell system, such as a hydrogen or a direct hydrocarbon fuel cell system, wherein the electrode structure comprises a substrat (210) or support structure having one or more discrete bulk porous matrix regions (220) disposed across a top surface (230) of the substrate. In this embodiment, each of the one or more discrete bulk porous matrix region is defind by acicular pores (240) that extend through the substrate or support structure. These pores define inner pore surfaces, which have a conformal electrically conductive layer thereon, as well as a plurality of catalyst par ticles.

La présente invention concerne des structures d'électrode de pile à combustible poreuses, des ensembles et des systèmes possédant une ou plusieurs couches métalliques enrobantes déposées sélectivement sur une ou plusieurs surfaces de pore, ainsi que divers procédés associés. Dans un mode de réalisation, cette invention concerne une structure d'électrode destinée à un système de pile à combustible tel qu'un système de pile à hydrogène ou de pile directe à hydrocarbure. Cette structure d'électrode comprend un substrat (210) ou une structure support possédant une ou plusieurs régions (220) de matrice poreuses discrètes brutes situées à travers une surface supérieure (230) du substrat. Dans ce mode de réalisation, chacune de ces régions de matrice poreuses discrètes brutes est définie par des pores aciculaires (240) qui s'étendent à travers le substrat ou la structure support. Ces pores définissent des surfaces de pore intérieures qui sont recouvertes d'une couche électriquement conductrice enrobante ainsi que d'une pluralité de particules de catalyseur.

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