MIXED BODY SUITABLE FOR ELECTRODE MATERIAL FOR SOLID ELECTROLYTE TYPE FUEL CELL, AND ELECTRODE FOR SOLID ELECTROLYTE TYPE FUEL CELL

摘要

PURPOSE:To improve electric performance of an electrode for a solid electrolyte type fuel cell (SOFC), by mixing a specific oxide solid solution with zirconium at a fixed ratio. CONSTITUTION:In the mixed body of an oxide solid solution and cubic and/or solution has main components of magnesium oxide and nickel oxide, the magnesium oxide is made to have 5mol or more and 25mol% or less to total mol quantity of the magnesium oxide and the nickel oxide, and the remainder is the nickel oxide. In cubic and/or tetragonal zirconium, its mixed quantity is made 35mol% or less to the total mol quantity of the mixed body. An SOFC electrode is manufactured by a usual method with the mixed body as material. At that time, it is required to reduce the oxide solid solvent to deposit Ni. Consequently electronic conductivity by Ni is given, and concurrently thermal expansion coefficient approaches that of the cubic oxide zirconium, usually used as solid electrolyte material, in the zirconium oxide, and ion conductivity is given.