Process for producing a membrane for the operation of fuel...

Details Process for producing a membrane for the operation of fuel... Process for producing a membrane for the operation of fuel...

C - Chemistry, Metallurgy

08

J

C08J 5/22 (2006.01) B01D 71/52 (2006.01) C08G 65/40 (2006.01) C08G 65/48 (2006.01) H01M 2/16 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01) C25B 13/08 (2006.01)

Patent

CA 2313317

Membranes for use in polymer electrolyte fuel cells or electrolyzers comprise a sulfonated aromatic polyether ether ketone of the formula (I) (see Formula I) wherein the ion exchange equivalent (I.E.C.) of the sulfonated polyether ether ketone is in the range from 1.35 to 1.95 mmol (-SO3H)/g (polymer) and the membrane has a long-term stability of at least 1000 hours at an operating voltage of from 0.4 to 1.1 V.

L'invention concerne une membrane destinée à être utilisée dans des piles à combustible à électrolyte polymère ou dans des électrolyseurs, qui contient une polyétheréthercétone aromatique sulfonée (sPEEK) correspondant à la formule générale (I). Cette membrane se caractérise en ce que l'équivalent d'échange ionique (CEI) de la polyétheréthercétone sulfonée se trouve dans la plage 1,35 - 1,95 mmol (-SO3H)/g (polymère), et en ce que la membrane présente, avec une tension de service de 0,4 à 1,1 V, une stabilité de longue durée, à savoir d'au moins 1000 heures.

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