| 摘要 |
PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell system capable of minimizing the occurrence of cracks or the like in a fuel battery cell due to oxidation of a fuel electrode, with a relatively simple constitution.SOLUTION: A solid oxide fuel cell system includes a fuel battery cell stack 6 comprising a plurality of fuel battery cells and a reformer 4 for reforming fuel gas. Reformed fuel gas reformed in the reformer 4 is supplied to a fuel electrode side, and oxidizing material gas is supplied to an oxygen electrode side. A reversible oxygen coupling member for suppressing an increase of an oxygen partial pressure is disposed in a fuel exhaust gas passage 56 through which fuel exhaust gas from the fuel battery cell stack 6 flows. The reversible oxygen coupling member is formed of: a reversible oxygen coupling metal material such as nickel, cobalt, copper and iron; a reversible oxygen coupling ceramic material obtained by mixing a reversible oxygen coupling metal material and ceramic of stabilized zirconia, ceria, lanthanum gallate or lanthanum silicate; or the like. |
