Fabrication of electrode structures by thermal spraying

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 4/12 (2006.01) B22F 1/00 (2006.01) C23C 4/06 (2006.01) H01M 4/04 (2006.01) H01M 4/88 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2627356

A method for the rapid production of electrode structures such as Cu-SDC anodes for use in direct oxidation solid oxide fuel cells involves co- depositing a copper-containing material and a ceramic by plasma spraying to form a coating on a substrate. Layers of CuO-SDC have been co-deposited by air plasma spraying, followed by in-situ reduction of the CuO to Cu in the anodes. Materials having catalytic properties, such as cobalt, may also be incorporated in the structures. Controlled compositional or microstructural gradients may be applied to optimize the microstructure and composition of the coatings.

L'invention concerne une méthode pour produire rapidement des structures d'électrode, notamment des anodes Cu/SDC à utiliser dans des piles à combustible à oxyde solide et à oxydation directe. Cette méthode consiste à codéposer une matière contenant du cuivre et une céramique par une pulvérisation de plasma pour former un revêtement sur un substrat. Des couches de CuO/SDC sont codéposées par une pulvérisation de plasma d'air suivie d'une réduction in situ du CuO en Cu dans les anodes. Des matières présentant des propriétés catalytiques, notamment le cobalt, peuvent également être intégrées dans les structures. Des gradients compositionnels ou microstructuraux commandés peuvent être appliqués pour optimiser la microstructure et la composition des revêtements.

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