SOLID OXIDE FUEL CELL AIR ELECTRODE, SOLID OXIDE FUEL CELL, AND METHOD FOR MANUFACTURING SOLID OXIDE FUEL CELL AIR ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide a solid oxide fuel cell air electrode which delivers superior characteristics under a use environment of an intermediate and low temperature region, and which makes possible to achieve high fuel cell characteristics even in use in the intermediate and low temperature region, and to exhibit high stability of a perovskite type crystalline structure even under such a use environment.SOLUTION: An air electrode for SOFC comprises: a porcelain composition expressed by the general formula [LnA][BB'Al]Oδ. In the formula, Ln represents one element selected from Y and lanthanoids or a combination of two or more kinds of them, A represents one element selected from Ba, Sr and Ca or a combination of two or more kinds of them, B represents Co or a combination of Co and Fe, and the mole number of Co is 50% or more to the total element mole number of B, and B' represents one element selected from Nb, Ta and Sn or a combination of two kinds of them; 0.8≤a≤1, 0