Blend membranes based on sulfonated poly(phenylene oxide)...

C - Chemistry – Metallurgy – 08 – L

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C08L 71/12 (2006.01) B01D 71/52 (2006.01) C08G 65/48 (2006.01) C08J 5/22 (2006.01) C08L 27/16 (2006.01) H01M 2/16 (2006.01) H01M 6/18 (2006.01) H01M 8/10 (2006.01) H01M 10/36 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2340197

Solid polymer membranes comprised of a high charge density sulfonated poly(phenylene oxide) blended with poly(vinylidene fluoride) in varied ratios have improved membrane characteristics. These membranes are inexpensive and possess very high ionic conductivity, and thus are suitable for solid polymer electrolytes in electrochemical applications, especially for the polymer electrolyte membrane (PEM) fuel cell, the electrolyte double-layer capacitor, and the rechargeable zinc-halide cell. These membranes enhance the performance of these devices.

Cette invention se rapporte à des membranes polymères solides, qui possèdent des caractéristiques de membranes améliorées et qui sont composées d'un poly(oxyde de phénylène) sulfoné à forte densité de charge, mélangé avec du poly(fluorure de vinylidène), dans des proportions variables. Ces membranes sont peu coûteuses et possèdent une conductivité ionique très élevée, et elles sont par conséquent appropriées pour servir d'électrolytes polymères solides dans des applications électrochimiques, en particulier pour la pile à combustible à membrane d'électrolyte polymère (PEM), pour le condensateur à double couche d'électrolyte et pour la pile zinc-halogénure rechargeable. Ces membranes améliorent les performances de ces dispositifs.

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