Highly fluorinated backbone polymer electrolyte membrane

H - Electricity – 01 – M

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H01M 8/10 (2006.01) C08J 5/22 (2006.01)

Patent

CA 2507541

A polymer electrolyte membrane is provided having a thickness of 90 microns or less and comprising a polymer, said polymer comprising a highly fluorinated backbone and recurring pendant groups according to the formula: YOSO2-CF2-CF2- CF2-CF2-O-[polymer backbone] (I) where Y is H+ or a monovalent cation such as an alkali metal cation. Typically, the membrane is a cast membrane. Typically, the polymer has a hydration product of greater than 22,000. Typically, the polymer has an equivalent weight of 800-1200.

L'invention concerne une membrane électrolyte polymère présentant une épaisseur de 90 micromètres, et comprenant un polymère qui possède une chaîne principale hautement fluorée, et des groupes pendants récurrents définis par la formule : YOSO¿2?-CF¿2?-CF¿2?-CF¿2?-CF¿2?-O-[chaîne principale du polymère] (I) dans laquelle Y représente H?+¿ ou un cation monovalent tel qu'un cation métal alcalin. Cette membrane est généralement une membrane moulée par coulée. Le polymère présente généralement un produit d'hydratation supérieur à 22 000, et un poids équivalent compris entre 800 et 1200. ? ¿

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