Polymer-based hydroxide conducting membranes

H - Electricity – 01 – M

Patent

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Details

H01M 6/18 (2006.01) H01M 8/10 (2006.01) H01M 10/26 (2006.01) H01M 12/06 (2006.01)

Patent

CA 2344148

A polymer-based electrolyte composition having excellent film-forming properties, flexibility, mechanical strength and high hydroxide conductivity is disclosed. The composition comprises an organic polymer having an alkyl quaternary ammonium salt structure; a nitrogen-containing, heterocyclic quaternary ammonium salt; and a metal hydroxide salt. In a preferred embodiment, the composition is cast in the form of a film that is suitable for use as an ion-conducting or other specialty membrane in a power source, such as for example an alkaline battery or fuel cell, that relies on hydroxide anion transport for its operation.

La présente invention concerne une composition d'électrolyte à base de polymère présentant une très bonne filmogénicité, une excellente flexibilité, une très bonne résistance mécanique et une perméabilité élevée aux hydroxydes. Cette composition comporte, d'une part un polymère organique présentant la structure d'un sel d'alkyle d'ammonium quaternaire, d'autre part un sel azoté d'ammonium quaternaire hétérocyclique, et enfin un sel d'hydroxyde de métal. Selon une réalisation préférée, la composition est coulée sous forme d'un film convenant à l'utilisation en tant que membrane conductrice d'ions ou de membrane intermédiaire dans une source d'électricité, et notamment une pile alcaline ou une pile à combustible dont le fonctionnement nécessite un transport d'anions hydroxyde.

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