Membrane electrode assemblies

Details Membrane electrode assemblies Membrane electrode assemblies

H - Electricity

01

M

H01M 8/10 (2006.01) C25B 9/10 (2006.01) H01M 8/02 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2303208

Membrane electrode assemblies are described that include an ion conductive membrane, a catalyst adjacent to the major surfaces of the ion conductive membrane and a porous particle filled polymer membrane adjacent to the ion conductive membrane. The catalyst can be disposed on the major surfaces of the ion conductive membrane. Preferably, the catalyst is disposed in nanostructures. The polymer film serving as the electrode backing layer preferably is processed by heating the particle loaded porous film to a temperature within about 20 degrees of the melting point of the polymer to decrease the Gurley value and the electrical resistivity. The MEAs can be produced in a continuous roll process. The MEAs can be used to produce fuel cells, electrolyzers and electrochemical reactors.

L'invention porte sur un ensemble électrode membranaire comportant une membrane conductrice d'ions, un catalyseur jouxtant les principales surfaces de ladite membrane, et une membrane poreuse de polymère chargée en particules et jouxtant la membrane conductrice d'ions. Le catalyseur, de préférence sous forme de nanostructures, peut être placé sur les surfaces principales de la membrane conductrice d'ions. Le film de polymère servant de couche support d'électrode est obtenu de préférence en chauffant le film poreux chargé en particules à une température avoisinant de 20 ·C le point de fusion du polymère, afin d'abaisser l'indice de Gurley et la résistivité électrique.

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