FUEL CELL WITH SOLID ELECTROLYTE

摘要

PURPOSE:To prevent laminate layers of an internal modification type SOFC in the form of a flat plate from exfoliating at the interfaces when it is in high temp. service. CONSTITUTION:A sheet of an air electrode (oxidating agent electrode) 1 made from a specific material is used also as a cell supporting plate, and on one side of this air electrode 1 a zirconia sole layer 21 is provided as an electrolyte layer, and thereover a Ni-containing zirconia layer 22 and a fuel modification layer 5 are formed as a fuel electrode. In this Ni-containing zirconia layer 22, the content of nickel working as a fuel electrode is varied continuously from the boundary zone of the Zirconia sole layer 21 to eliminate existence of interface where the nickel distribution differs distinctly. Also in the fuel modification layer 5, the content of nickel committing to modification is varied continuously from the boundary region of the Ni-containing zirconia layer 22 to nullify existence of interface where nickel distribution differs expressly. Thus exfoliation of layers in high temp. service is prevented by eliminating existence of distinct interface.