Hydrophilic polymers and their use in electrochemical cells

Details Hydrophilic polymers and their use in electrochemical cells Hydrophilic polymers and their use in electrochemical cells

H - Electricity

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H01M 8/00 (2006.01) C08F 220/48 (2006.01) C08F 226/10 (2006.01) C08J 5/22 (2006.01) C25B 9/10 (2006.01) C25B 13/08 (2006.01) H01M 2/16 (2006.01)

Patent

CA 2459340

A hydrophilic cross-linked polymer obtainable by copolymerisation of hydrophobic and hydrophilic monomers that give a cross-linked hydrophilic polymer on polymerisation; a monomer including a strongly ionic group; and water is useful as the membrane in an assembly that can be used in an electrolyter or fuel cell. More generally, a membrane electrode assembly comprises electrodes and an ion-exchange membrane which comprises a hydrophilic polymer including a strongly ionic group. A method for producing a membrane electrode assembly comprising electrodes and an ion-exchange membrane, comprises introducing between the electrodes a material or materials from which the membrane can be formed, and forming the membrane in situ.

L'invention concerne un polymère hydrophile réticulé, obtenu par copolymérisation de monomères hydrophobes et hydrophiles qui forment un polymère hydrophile réticulé sur polymérisation. Un monomère contenant un groupe fortement ionique et de l'eau sont utilisés en tant que membrane dans un ensemble qui peut être destiné à un électrolyseur ou à une pile à combustible. Plus généralement, un ensemble électrodes-membrane comprend des électrodes et une membrane d'échange ionique qui contient un polymère hydrophile comprenant un groupe fortement ionique. L'invention concerne également un procédé permettant de produire ledit ensemble électrodes-membrane comprenant des électrodes et une membrane d'échange ionique, ce procédé consistant à introduire entre les électrodes un/des matériau(x) à partir duquel/desquels la membrane peut être formée, puis à former ladite membrane in situ.

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