Fuel cell stack and method for making the same

H - Electricity – 01 – M

Patent

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Details

H01M 8/24 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2652085

A fuel cell stack (1) includes a membrane electrode assembly (3) including an electrolyte membrane (4) and electrode catalyst layers (5A, 5C) sandwiching the electrolyte membrane; metal separators (7A, 7C) that define gas channels (8A, 8C), the metal separators being respectively disposed at both surfaces of the membrane electrode assembly; a current collector (14) from which electromotive force is derived, the current collector being in contact with at least one of the metal separators; and joining parts (11) that join the metal separator to the current collector at portions where the metal separator contacts the current collector.

Selon l'invention, un empilement de pile à combustible (1) comprend un ensemble d'électrodes membranaires (3) comprenant une membrane électrolytique (4) et des couches de catalyseur d'électrode (5A, 5C) intercalant la membrane électrolytique ; des séparateurs métalliques (7A, 7C) qui définissent les canaux de gaz (8A, 8C), les séparateurs métalliques étant respectivement disposés sur les deux surfaces de l'ensemble d'électrodes membranaires ; un collecteur de courant (14) depuis lequel est dérivée la force électromotrice, le collecteur de courant étant en contact avec au moins l'un des séparateurs métalliques ; et des éléments de jonction (11) qui joignent le séparateur métallique au collecteur de courant au niveau des endroits où le séparateur métallique est en contact avec le collecteur de courant.

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