Method of manufacturing gas diffusion electrodes

Details Method of manufacturing gas diffusion electrodes Method of manufacturing gas diffusion electrodes

H - Electricity

01

M

H01M 4/86 (2006.01) H01M 4/88 (2006.01)

Patent

CA 2521669

A process is described for manufacturing gase diffusion electrodes, which process comprises: (a) treating an area of a pre-shrunk porous hydrophobic substrate so as to restrict the slurry deposited in step b) to the said area, preferably by forming a well in the area and/or treating the substrate in the area to render it less hydrophobic, e.g. by plasma treating the area; (b) dispensing a slurry of catalyst onto the said area, (c) removing liquid from the dispensed slurry, (d) treating the dried slurry to remove organic materials and (e) cutting the catalyst and the underlying portion of substrate from the rest of the substrate.

L'invention concerne un procédé pour produire des électrodes à diffusion gazeuse, ledit procédé consistant à : (a) traiter une zone d'un substrat hydrophobe poreux pré-rétréci, de manière à confiner la suspension épaisse déposée à l'étape b) dans ladite zone, de préférence en formant un puits dans cette zone et/ou en traitant le substrat dans ladite zone de façon à le rendre moins hydrophobe, par ex. par traitement de ladite zone au plasma ; (b) verser une suspension épaisse de catalyseur sur ladite zone ; (c) retirer le liquide de la suspension versée ; (d) traiter la suspension déshydratée pour retirer les matières organiques et (e) découper le catalyseur et la partie sous-jacente du substrat dans le reste du substrat.

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