Ion exchange materials

H - Electricity – 01 – M

Patent

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Details

H01M 8/10 (2006.01) C08G 65/48 (2006.01) C08J 5/22 (2006.01) C25B 9/00 (2006.01) H01B 1/12 (2006.01) H01M 8/02 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2402841

A method of preparing an ion-conducting material, for example membrane, having reduced sensitivity to water includes a step of treating an ion-conducting polymeric material (especially a sulphonated polyaryletherketone and/or sulphone) which has at least some crystallinity or which is crystallisable with a means to increase its crystallinity. The ion-conducting material prepared may be used in a Membrane Electrode Assembly of a fuel cell.

L'invention concerne un procédé de préparation d'un matériau conducteur d'ions, par exemple une membrane qui possède une sensibilité réduite à l'eau, ce procédé comprenant l'étape consistant à traiter un matériau polymère conducteur d'ions (notamment une polyaryléthercétone sulfonée et/ou une sulfone) qui possède au moins une certaine cristallinité, ou qui peut se cristalliser à l'aide d'un moyen conçu pour accroître sa cristallinité. Le matériau conducteur d'ions ainsi préparé peut s'utiliser dans un ensemble électrodes membranaires d'une pile à combustible.

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