Electrically conductive fuel cell contact material

Details Electrically conductive fuel cell contact material Electrically conductive fuel cell contact material

H - Electricity

01

M

H01M 8/00 (2006.01)

Patent

CA 2530205

A multilayer contact approach for use in a planar solid oxide fuel cell stack includes at least 3 layers of an electrically conductive perovskite which has a coefficient of thermal expansion closely matching the fuel cell material. The perovskite material may comprise La1-x Ex Co0.6Ni 0.4O3 where E is a alkaline earth metal and x is greater than or equal to zero. The middle layer is a stress relief layer which may fracture during thermal cycling to relieve stress, but remains conductive and prevents mechanical damage of more critical interfaces.

Une approche de contact multicouche destiné à une batterie de piles à combustibles à oxyde solide plan conclut au moins 3 couches d'une pérovskite électro-conductrice dont le coefficient de dilatation correspond à celui du matériau de la pile à combustible. La pérovskite peut comporter du La¿1-x? E¿x? Co¿0.6?Ni ¿0.4?O¿3?, auquel cas E est un métal alcalino-terreux est "x" est un nombre non négatif. La couche intermédiaire, qui est une couche à recuit de détente pouvant se fracturer pendant le recyclage thermique de recuit, reste conductrice et évite les dégâts mécaniques sur les interfaces plus critiques

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