Polymer electrolyte membrane and solid polymer electrolyte...

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H01M 2/16 (2006.01) B01D 69/10 (2006.01) B01D 69/14 (2006.01) B01D 71/52 (2006.01) B01D 71/72 (2006.01) B01D 71/82 (2006.01) C08J 5/22 (2006.01) C08L 65/00 (2006.01) H01M 8/10 (2006.01) C08L 71/00 (2006.01) H01M 4/86 (2006.01)

Patent

CA 2368669

A composite polymer electrolyte membrane is formed from a first polymer electrolyte comprising a sulfonated polyarylene polymer and a second polymer electrolyte comprising another hydrocarbon polymer electrolyte. In the first polymer electrolyte, 2-70 mol% constitutes an aromatic compound unit with an electron-attractive group in its principal chain, while 30-98 mol% constitutes an aromatic compound unit without an electron-attractive group in its principal chain. The second polymer electrolyte is a sulfonated polyether or sulfonated polysulfide polymer electrolyte. The composite polymer electrolyte membrane is formed from a matrix comprising the first polymer electrolyte selected from among sulfonated polyarylene polymers and having an ion exchange capacity in excess of 1.5 meq/g but less than 3.0 meq/g, which is supported on a reinforcement comprising the second polymer electrolyte having an ion exchange capacity in excess of 0.5 meq/g but less than 1.5 meq/g. The polymer electrolyte membrane comprises a polyarylene polymer sulfonated so that the Q value is within the range 0.09-0.18 C/cm2.

Une membrane électrolytique polymérique composite est obtenue à partir d'un premier électrolyte polymérique composé d'un polyarylène sulfoné et d'un second électrolyte polymérique comportant un autre électrolyte polymérique hydrocarburé. Dans le premier électrolyte polymérique, 2 à 70 % en moles correspond à un composé aromatique ayant un groupement électrophile sur sa chaîne principale, tandis que 30 à 98 % en moles correspond à un composé aromatique sans un le groupe sur sa chaîne principale. Le second électrolyte polymérique est un polyéther sulfoné ou un polysulfure sulfoné. La membrane électrolyituqe polymérique composite est formée à partir d'une matrice renfermant le premier électrolyte polymérique, qui est un polyarylène sulfoné, et possédant une capacité d'échange ionique supérieure à 1,5 méq/g, mais inférieure à 3,0 méq/g, qui est renforcée par le second électrolyte polymérique, dont la capacité d'échange ionique est supérieure à 0,5 méq/g, mais supérieure à 1,5 méq/g. La membrane électrolytique polymérique comporte un polyarylène sulfoné dans des conditions telles que la valeur Q se situe entre 0,09 et 0,18 C/cm2.

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