Sealant integrated fuel cell components and methods and...

H - Electricity – 01 – M

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H01M 8/00 (2006.01) H01M 2/08 (2006.01) H01M 2/14 (2006.01)

Patent

CA 2637061

A fuel cell, having improved sealing against leakage, includes a sealant disposed over the peripheral portions a membrane electrode assembly such that the cured sealant penetrates a gas diffusion layer of the membrane electrode assembly. The sealant is applied through liquid injection molding techniques to form cured sealant composition at the peripheral potions of the membrane electrode assembly. The sealant may be thermally cured at low temperatures, for example 130~ C or less, or may be cured at room temperature through the application of actinic radiation.

La présente invention concerne une pile à combustible ayant une étanchéité aux fuites améliorée, comprenant un agent d'étanchéité disposé sur les parties périphériques d'un ensemble électrodes à membrane, de sorte que l'agent d'étanchéité durci pénètre dans une couche de diffusion de gaz de l'ensemble électrodes à membrane. L'agent d'étanchéité est appliqué par des techniques de moulage par injection de liquide pour former une composition d'agent d'étanchéité durci au niveau des parties périphériques de l'ensemble électrodes à membrane. L'agent d'étanchéité peut être durci thermiquement à des températures basses, par exemple 130° C ou moins, ou peut être durci à température ambiante par application d'un rayonnement actinique.

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