Cell for fuel cell, method for producing the same, and gas...

H - Electricity – 01 – M

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

Patent

CA 2704776

A cell (10) for a fuel cell, comprising a membrane electrode assembly (18), expanded moldings (20) that are laminated to both surfaces of the membrane electrode assembly (18) and form gas channels, and separators (22) that are laminated to the gas channel structures (20) and separate the gases between adjacent cells, wherein each of the expanded moldings (20) comprises a gas channel substrate (24) formed from a metal material such as a titanium material or a stainless steel, a conductive layer (26) that is formed from a conductor such as gold (Au) on a contact portion (25) of the gas channel substrate (24) that contacts the membrane electrode assembly (18) or the separator (22), and a hydrophilic layer (28) that is formed from a hydrophilic material such as a titanium oxide on the gas channel surface of the gas channel substrate (24).

L'invention porte sur une pile (10) pour piles à combustible. Ladite pile comporte un ensemble membrane-électrode (18), des corps moulés par expansion (20) agencés sur les deux côtés de l'ensemble membrane-électrode (18) et formant respectivement un canal de gaz, et des séparateurs (22) agencés sur les corps moulés par expansion (20) pour séparer les gaz de deux piles adjacentes l'un de l'autre. Chacun des corps moulés par expansion (20) comprend une base de canal de gaz (24) faite d'un matériau métallique tel qu'un matériau à base de titane ou d'acier inoxydable, une couche conductrice (26) faite d'un conducteur tel que l'or (Au) et formée sur une partie de contact (25) de la base de canal de gaz (24), laquelle partie (25) est en contact avec l'ensemble membrane-électrode (18) ou avec un séparateur (22), et une couche hydrophile (28) faite d'un matériau hydrophile tel que de l'oxyde de titane et formée sur la surface de canal de gaz de la base de canal de gaz (24).

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