H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/24 (2006.01) H01M 4/86 (2006.01) H01M 8/10 (2006.01)
Patent
CA 2588025
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-xEx Co0.6Ni0.4O3 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.
Selon l~invention, un système de contact multicouche destiné à être utilisé dans un empilement plan de piles à combustible oxyde solide comporte au moins 3 couches de pérovskite conductrice de l~électricité dont le coefficient de dilatation thermique est très proche de celui de la substance des piles à combustible. La pérovskite est constituée de La1-xEx Co0.6Ni0.4O3, où E est un métal alcalino-terreux et x est supérieur ou égal à zéro. La couche intermédiaire est une couche de relaxation des contraintes susceptible de se fracturer au cours du cyclage thermique pour relaxer les contraintes, tout en restant conductrice et en évitant l~endommagement mécaniques d~interfaces plus critiques.
Joia Tahir
Tang Zheng
Wood Anthony
Bennett Jones Llp
Versa Power Systems Ltd.
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