Solid polymer fuel cell and method for producing mea used...

H - Electricity – 01 – M

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H01M 4/86 (2006.01) B01J 35/00 (2006.01) C01B 31/02 (2006.01) H01M 4/88 (2006.01) H01M 4/92 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2643157

This invention intends to improve the catalyst efficiency by sufficiently providing a triple phase boundary where reaction gas, catalysts, and electrolytes meet in carbon nanohorns. With the utilization of the resulting MEA, the electrode reactions are allowed to effectively proceed, and the power generation efficiency of a fuel cell is improved to result in a solid polymer fuel cell with excellent properties. Such solid polymer fuel cell comprises electrodes having a catalyst layer comprising: a carrier comprising a carbon nanohorn aggregate; catalytic metals supported on the carrier comprising a carbon nanohorn aggregate; and polymer electrolytes coating the carrier comprising a carbon nanohorn aggregate, wherein the proportion of the polymer electrolyte to the carbon nanohorn aggregate is 0.32:1 to 0.70:1 by weight.

L'objet de la présente invention est d'améliorer l'efficacité catalytique en ayant une région de points triples suffisante dans laquelle les gaz de réaction, les catalyseurs et les électrolytes sont en contact dans des nanotubes de carbone. En utilisant le MEA ainsi produit, les réactions d'électrode peuvent être efficaces et le rendement énergétique de la pile à combustible est amélioré, donnant ainsi une pile à combustible à polymère solide ayant d'excellentes propriétés. Une telle pile à combustible à polymère solide comprend des électrodes comportant une couche de catalyseur comportant : un support comportant un agrégat de nanotubes de carbone, des métaux catalytiques sur le support comportant un agrégat de nanotubes de carbone et des électrolytes polymères recouvrant le support comportant un agrégat de nanotubes de carbone, avec un rapport électrolyte polymère / agrégat de nanotubes de carbone entre 0,32 :1 et 0,70 :1 en poids.

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