H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/02 (2006.01) H01M 8/12 (2006.01)
Patent
CA 2246254
The invention relates to a high-temperature fuel cell (2) in which two electrodes (8, 12) are arranged between composite conducting structures (4, 16; 22, 20, 24) which remove the current produced in the high temperature fuel cell (2) and supply the electrodes (8, 12) with an operating means. At least one composite conducting structure (4, 16; 22, 20, 24) consists at least partially of an alloy based on Fe with a Cr content of between 17 and 30 % by weight which has an average coefficient of thermal expansion in the temperature range of room temperature to 900 ~C. Said coefficient of thermal expansion is adapted to the coefficient of thermal expansion of the electrolyte (10) and is 13 to 14x10-6/K, thereby reducing material costs for the composite conducting structures (4, 16; 22, 20, 24) by a factor of 10 to 20 in comparison with prior art composite conducting structures.
L'invention concerne une cellule électrochimique haute température (2) dans laquelle deux électrodes (8, 12) sont disposées entre des structures conductrices composites (4, 16; 22, 20, 24) qui évacuent le courant produit dans la cellule électrochimique haute température (2) et alimentent les électrodes (8, 12) avec un moyen de fonctionnement. Au moins une structure conductrice composite (4, 16; 22, 20, 24) est constituée au moins partiellement d'un alliage à base de Fe avec une teneur en Cr comprise entre 17 et 30 % en poids, présentant un coefficient de dilatation thermique moyen dans la plage de températures comprises entre la température ambiante et 900 ·C. Ledit coefficient de dilatation thermique est adapté à celui de l'électrolyte (10) et est égal à 13 à 14x10?-6¿/K, ce qui permet de réduire les coûts matière des structures conductrices composites (4, 16; 22, 20, 24) d'un facteur de 10 à 20 par rapport aux structures conductrices composites de la technique antérieure.
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
LandOfFree
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