Solid polymer electrolyte membrane, method for producing...

H - Electricity – 01 – B

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H01B 13/00 (2006.01) C08F 291/00 (2006.01) C08J 5/22 (2006.01) H01B 1/06 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2607268

Disclosed is a high-performance solid polymer electrolyte membrane which is excellent in mechanical strength, chemical stability and dimensional stability while being decreased in methanol permeability. This solid polymer electrolyte membrane is obtained by radiation graft polymerization without causing gelation of the solution. Such a solid polymer electrolyte membrane is obtained by graft polymerizing a polymerizable monomer having an alkoxysilyl group by itself or the polymerizable monomer having an alkoxysilyl group together with another polymerizable monomer onto a resin film which is irradiated with radiation, and then subjecting the alkoxysilyl group to hydrolysis and dehydration condensation. A fuel cell is obtained by arranging such a solid polymer electrolyte membrane between a fuel electrode and an air electrode.

L~invention décrit une membrane à électrolyte polymère solide aux performances élevées, qui offre d~excellentes caractéristiques de résistance mécanique, de stabilité chimique et de stabilité dimensionnelle, tout en faisant preuve d~une perméabilité réduite au méthanol. Cette membrane à électrolyte polymère solide est obtenue par polymérisation avec greffage activée par irradiation, sans provoquer la gélification de la solution. Pour obtenir ladite membrane, on polymérise avec greffage un monomère polymérisable portant un groupe alcoxysilyle, seul ou avec un autre monomère polymérisable, sur un film de résine irradié par un rayonnement, puis on soumet le groupe alcoxysilyle à une hydrolyse et à une condensation par déshydratation. Une pile à combustible est fabriquée en disposant ladite membrane à électrolyte polymère solide entre une électrode à combustible et une électrode à air.

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