Cell for solid oxide fuel cell

H - Electricity – 01 – M

Patent

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Details

H01M 8/02 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2722549

Disclosed is a cell for a solid oxide fuel battery, comprising a Cr-containing alloy or the like and an air electrode joined to each other, which can satisfactorily suppress the occurrence of Cr poisoning of the air electrode and can suppress the progress of a Cr depletion-derived oxidation degradation of the alloy and the like. The cell for a solid oxide fuel battery comprises a Cr-containing alloy or oxide (1) and an air electrode (31) joined to each other. A film containing a spinel-type oxide comprising a first single oxide having an equilibrium dissociation oxygen partial pressure at 750°C of 1.83 x 10-20 to 3.44 x 10-13 atm and a second single oxide having a lower equilibrium dissociation oxygen partial pressure at 750°C than the first single oxide is provided on a surface of the alloy or oxide (1).

L'invention porte sur une cellule pour une batterie à combustible à oxyde solide, comprenant un alliage contenant Cr ou analogue et une électrode à air joints l'un à l'autre, qui peut supprimer de façon satisfaisante l'occurrence d'empoisonnement par Cr de l'électrode à air et peut supprimer la progression d'une dégradation par oxydation provenant d'un appauvrissement en Cr de l'alliage et analogue. La cellule pour batterie à combustible à oxyde solide comprend un alliage ou oxyde contenant Cr (1) et une électrode à air (31) joints l'un à l'autre. Un film contenant un oxyde de type spinelle comprenant un premier oxyde simple ayant une pression partielle d'oxygène de dissociation à l'équilibre à 750°C de 1,83 × 10-20 à 3,44 × 10-13 atm et un second oxyde simple ayant une pression partielle d'oxygène de dissociation à l'équilibre à 750°C plus faible que le premier oxyde simple est formé sur une surface de l'alliage ou oxyde (1).

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