Proton-conducting polymer membrane that contains polyazoles...

Details Proton-conducting polymer membrane that contains polyazoles... Proton-conducting polymer membrane that contains polyazoles...

H - Electricity

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H01M 8/10 (2006.01) B01D 71/62 (2006.01) C08G 73/18 (2006.01) H01M 4/86 (2006.01) H01M 4/92 (2006.01)

Patent

CA 2500774

The invention relates to a proton-conducting polymer membrane that contains polyazoles, is coated with a catalyst layer, and is obtained by a method comprising the steps of A) producing a mixture containing polyphosphoric acid, at least one polyazole (polymer A), and/or at least one or several compounds that are suitable for forming polyazoles under the influence of heat according to step B), B) heating the mixture obtained in step A) to temperatures of up to 400 ~C under inert gas, C) applying a layer to a support by using the mixture according to step A) and/or B), D) treating the membrane formed in step C) until said membrane is self-supporting, and E) applying at least one coating containing a catalyst to the membrane formed in step C) and/or step D).

L'invention concerne une membrane polymère conductrice de protons recouverte d'une couche catalytique et contenant des poyazoles. Cette membrane polymère conductrice de protons peut être produite au moyen d'un procédé comprenant les étapes consistant : A) à produire un mélange contenant de l'acide polyphosphorique, au moins un polyazole (polymère A) et/ou au moins un ou plusieurs composés destinés à former des polyazoles lorsqu'ils sont chauffés, comme dans l'étape B) ; B) à chauffer le mélange formé au cours de l'étape A) sous gaz inerte pour le porter à des températures pouvant atteindre 400 ·C ; C) à appliquer une couche sur un support au moyen du mélange formé au cours de l'étape A) et/ou de l'étape B) ; D) à traiter la membrane formée au cours de l'étape C) jusqu'à ce qu'elle soit autoportante ; E) à appliquer au moins un revêtement contenant un catalyseur sur la membrane formée au cours de l'étape C) et/ou de l'étape D).

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