Polymer electrolyte material, polymer electrolyte part,...

H - Electricity – 01 – M

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H01M 8/02 (2006.01) C08G 65/40 (2006.01) C08G 75/02 (2006.01) C08G 75/20 (2006.01) C08G 79/04 (2006.01) H01B 1/06 (2006.01)

Patent

CA 2518414

A polymer electrolyte material excelling in not only proton conductivity but also fuel cutoff properties; and a polymer electrolyte type fuel cell of high efficiency. In particular, a polymer electrolyte material wherein in a hydrous state the fraction of antifreeze water (Rw1) represented by the following formula (S1) is in the range of 20 to 100 wt.%. Rw1 = [Wnf/(Wfc + Wnf)] x 100 (S1) wherein Wnf: amount of antifreeze water per g of dry weight of polymer electrolyte material, and Wfc: amount of low-melting-point water per g of dry weight of polymer electrolyte material.

L'invention concerne un électrolyte polymérique présentant non seulement une excellente conductivité de protons mais également d'excellentes propriétés de coupure de combustible, ainsi qu'une pile à combustible à électrolyte polymérique hautement performante. L'invention concerne, en particulier, un électrolyte polymérique dans lequel, à l'état hydrique, la fraction d'eau antigel (Rw1) représentée par la formule suivante (S1) varie de 20 à 100 % en poids. Rw1 = [Wnf/(Wfc + Wnf) ] x 100 (S1), Wnf étant la quantité d'eau antigel par g en poids sec de l'électrolyte polymérique, et Wfc étant la quantité d'eau à faible point de fusion par g en poids sec de l'électrolyte polymérique.

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