Powder catalyst material, method for producing same and...

H - Electricity – 01 – M

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H01M 4/88 (2006.01) H01M 4/86 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2561942

The battery performance of a solid polymer fuel cell is improved by forming a good three-phase interface. Specifically, a catalyst-supporting conductor (10), a solid polymer electrolyte (20, 30) and a good solvent and a poor solvent for the solid polymer electrolyte are mixed for obtaining an ink wherein at least a part of the solid polymer electrolyte is formed into colloids (30). The thus-obtained ink is then dried, so that there is obtained a powder catalyst material (40). A catalyst layer of an electrode is formed through powder application of the powder catalyst material to an electrolyte membrane or a gas diffusion layer.

Les performances de batterie d'une pile à combustible à polymère solide sont améliorées en formant une bonne interface à trois phases. En particulier, un conducteur portant un catalyseur (10), un électrolyte de polymère solide (20, 30), un bon solvant et un solvant pauvre pour l'électrolyte de polymère solide sont mélangés pour obtenir une encre dans laquelle au moins une partie de l'électrolyte de polymère solide est formé en colloïdes (30). L'encre ainsi obtenue est ensuite séchée de sorte que l'on obtient un matériau de catalyseur en poudre (40). Une couche de catalyseur d'électrode est formée par l'intermédiaire de l'application de la poudre du matériau de catalyseur en poudre sur une membrane d'électrolyte ou sur une couche de diffusion de gaz.

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