Ion-exchange materials with improved ion conductivity

Details Ion-exchange materials with improved ion conductivity Ion-exchange materials with improved ion conductivity

H - Electricity

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H01M 8/10 (2006.01) B01D 71/28 (2006.01) B01D 71/78 (2006.01) C08F 8/00 (2006.01) C08J 5/22 (2006.01) H01B 1/12 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2446389

Ion-exchange materials comprising a polymeric backbone and a plurality of pendent styrenic or fluorinated styrenic macromonomers covalently bonded thereto, wherein the plurality of pendent styrenic or fluorinated styrenic macromonomers comprise a uniform number of styrenic or fluorinated styrenic monomer repeat units, and wherein predominantly all of the styrenic or fluorinated styrenic monomer repeat units have at least one charged group. Processes for making such materials, as well as products related thereto, are also disclosed. In a representative embodiment, the ion-exchange material is utilized as a proton-exchange membrane (PEM) for use in a PEM fuel cell.

L'invention concerne des matières échangeuses d'ions comprenant un squelette polymère et plusieurs macromonomères styréniques ou styréniques fluorés liés par covalence à celui-ci. Ces macromonomères comprennent un nombre uniforme d'unités de répétition de monomères styréniques fluorés ou monomères styréniques et toutes les unités de répétition de monomères styréniques fluorés ou monomères styréniques comportent au moins un groupe chargé. L'invention traite également de procédés de fabrication de ces matières, ainsi que de produits les concernant. Selon un mode de réalisation représentatif, la matière échangeuse d'ions est utilisée comme membrane échangeuse de protons pour fonctionner dans une pile à combustible à membrane échangeuse de protons.

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