Fuel cell system

H - Electricity – 01 – M

Patent

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H01M 8/04 (2006.01)

Patent

CA 2546850

A fuel cell system and a method of operating a fuel cell system are disclosed wherein an external electric source (4) is provided to apply current to a fuel cell (1), comprised of a polymer electrolyte membrane-electrode catalyst complex having a polymer electrolyte membrane (21) sandwiched between a fuel electrode (24A) and an oxidant electrode (24B) and separators (26, 28) formed with flow channels (27, 29) to supply fuel and oxidant to the polymer electrolyte membrane-electrode catalyst complex, and operative to change a direction in which current is applied to the fuel cell (1).

La présente invention concerne un système de pile à combustible et son mode de fonctionnement. En l'occurrence, on dispose d'une source extérieure de courant électrique (4) servant à appliquer un courant électrique à une pile à combustible (1). Celle-ci est constituée, d'une part d'un complexe entre une membrane à électrolyte polymère et un catalyseur d'électrode comportant une membrane à électrolyte polymère (21) prise en sandwich entre une électrode à combustible (24A) et une électrode à oxydant (24B), et d'autre part de séparateurs (26, 28). Ceux-ci comportent des canaux (27, 29) alimentant le complexe en combustible et en oxydant. Ce système fonctionne en modifiant un sens dans lequel le courant est appliqué à la pile à combustible (1).

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