Metal separator for fuel cell and its production method

Details Metal separator for fuel cell and its production method Metal separator for fuel cell and its production method

H - Electricity

01

M

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

Patent

CA 2469805

The present invention provides a metallic separator for fuel cells capable of suppressing dropping out of conductive inclusions due to gaps formed at the interface of a base material and the conductive inclusions due to press-forming, thereby decreasing the contact resistance and enhancing the power generation performance, and also provides a method for producing the same.

L'invention concerne un séparateur de métaux destiné à une pile à combustible dans laquelle une inclusion conductrice fait saillie à partir de la surface, la surface de la matrice étant soumise au traitement de formation d'une couche de substance chimique afin de faciliter l'expansion du volume de la matrice. La condition 0,16 </= R/r </= 0,8 est satisfaite, R représentant le diamètre équivalent d'un cercle moyen de l'inclusion conductrice et r le diamètre équivalent d'un cercle moyen des grains cristallins de la matrice. L'inclusion conductrice est conçue de manière à ne pas se décoller, il en résulte que la résistance de contact est réduite, ce qui permet de fortement améliorer les performances de génération de l'appareil.

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