Method for producing membrane-electrode assembly for fuel cell

Details Method for producing membrane-electrode assembly for fuel cell Method for producing membrane-electrode assembly for fuel cell

H - Electricity

01

M

H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2542980

Disclosed is a method for removing a solvent (41) in an electrolyte membrane (24) as a constituent of a membrane-electrode assembly (12) used in a fuel cell. The membrane-electrode assembly is arranged in a water vapor, and the water vapor is introduced into the electrolyte membrane by being transmitted through diffusion layers (21, 27) respectively on positive/negative electrode sides. The solvent in the electrolyte membrane is removed by the thus- introduced water vapor. This removal of the solvent is performed at temperatures which are not higher than the decomposition temperature of the hydrocarbon solid polymer.

L'invention concerne un procédé permettant d'éliminer un solvant (41) d'une membrane (24) électrolyte faisant partie d'un ensemble (12) membrane-électrode utilisé dans une pile à combustible. Ce procédé consiste à placer l'ensemble membrane-électrode dans un environnement de vapeur d'eau, et à introduire la vapeur d'eau dans la membrane électrolyte en la faisant passer à travers les couches (21, 27) de diffusion sur les faces d'électrode positive et négative respectives. Le solvant contenu dans la membrane électrolyte est éliminé par la vapeur d'eau ainsi introduite. Cette élimination du solvant est effectuée à des températures ne dépassant pas la température de décomposition du polymère hydrocarboné solide.

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