H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/02 (2006.01) H01M 8/10 (2006.01) H01M 4/86 (2006.01) H01M 4/92 (2006.01)
Patent
CA 2379872
A solid polymer electrolyte type fuel cell having, as an electrolyte, a cation exchange film comprising a perfluorocarbon polymer having a sulfonic acid groupe, characterized in that the cation exchange film has been subjected to a stretching treatment, and preferably has a film area which has been increased by 5 to 10% based on its original area through the stretching treatment. The cation exchange film having been subjected to such a stretching treatment is free from wrinkles caused by elongation even when used under conditions wherein humidity is prone to changes, which results in the manufacture of a solid polymer electrolyte type fuel cell having a high output and excellent durability.
La présente invention concerne une pile à combustible à électrolyte polymère solide dont l'électrolyte est un film d'échange de cations comprenant un polymère perfluorocarboné portant un groupe acide sulfonique. La pile est caractérisée en ce que le film d'échange de cations a été soumis à un traitement d'étirement, et qu'il présente une superficie qui a été augmentée de 5 à 10% de sa superficie d'origine par le traitement d'étirement. En l'occurrence, le film qui a été soumis à un tel traitement d'étirement est exempt de rides imputables à l'étirement, même lorsqu'on l'utilise dans des conditions où l'hygrométrie est prompte à varier. Il en résulte que la pile à combustible à électrolyte polymère solide ainsi obtenue se distingue par son bon rendement et sa longue durée de vie.
Higuchi Yoshiaki
Hommura Satoru
Shimohira Tetsuji
Terada Ichiro
Asahi Glass Company Limited
Smart & Biggar
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