Bromine, chlorine or iodine functional polymer electrolytes...

Details Bromine, chlorine or iodine functional polymer electrolytes... Bromine, chlorine or iodine functional polymer electrolytes...

C - Chemistry, Metallurgy

08

J

C08J 5/22 (2006.01) B01D 71/36 (2006.01) C08F 214/26 (2006.01) C08J 3/28 (2006.01)

Patent

CA 2545176

A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, as well as the polymer so made, the method comprising application of electron beam radiation to a highly fluorinated fluoropolymer comprising: a backbone derived in part from tetrafluoro-ethylene monomer, first pendent groups which include a group according to the formula -SO2X, where X is F, C1, Br, OH or -O-M+, where M+ is a monovalent cation, and second pendent groups which include Br, C1 or I. Typically, the membrane has a thickness of 90 microns or less, more typically 60 or less, and most typically 30 microns or less.

L'invention concerne un procédé permettant de fabriquer un électrolyte polymère durci, normalement, sous forme d'une membrane utilisée en tant que membrane d'électrolyte polymère dans une pile électrolytique, telle qu'une pile à combustible, ainsi que le polymère élaboré. Le procédé consiste à appliquer des rayonnements de faisceau électronique sur un fluoropolymère extrêmement fluoré comportant un squelette partiellement dérivé d'un monomère de tétrafluoro-éthylène, des premiers groupes pendants qui englobent un groupe de formule -SO¿2?X, dans laquelle X représente F, Cl, Br, OH ou -O-M?+¿, M?+¿ représentant un cation monovalent, et des seconds groupes pendants qui comprennent Br, Cl ou I. Généralement, la membrane présente une épaisseur de 90 microns au maximum, plus souvent de 60 microns au maximum et, dans la grande partie des cas, de 30 microns au maximum. ? ¿

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