The solid electrolyte type fuel cell

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PROBLEM TO BE SOLVED : To improve the low-temperature characteristics of an air electrode for an SOFC by solving the problem of reaction deterioration which arises when a perovskite oxide having a lanthanoid element at A sites and a cobalt element at B sites is used for an air electrode, and by reducing the coefficient of thermal expansion to some extent.SOLUTION : A solid electrolyte fuel cell comprises a fuel electrode, a solid electrolyte, and an air electrode laminated in the order presented above. The air electrode comprises an active layer containing a rare-earth-added ceria and a perovskite oxide (ABO) at a ratio of 10 wt% : 90 wt% to 60 wt% : 40 wt%, and a collector layer formed on the active layer. The active layer is disposed between the collector layer and the solid electrolyte, and the perovskite oxide has a lanthanoid element at A sites and a cobalt element at B sites, and has a divalent metallic element only at B sites.