ELECTROLYTE COMPOSITE MEMBER, ELECTROLYTE/ELECTRODE COMPOSITE MEMBER, AND METHOD FOR MANUFACTURING ELECTROLYTE COMPOSITE MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a highly strong electrolyte composite member capable of reducing the resistance of ion conduction, an electrolyte/electrode composite member, and a method for manufacturing the electrolyte composite member.SOLUTION: An electrolyte composite member 1 includes a solid electrolyte layer 10 made of a metal oxide, and a porous body layer 11 including a three-dimensional meshed porous body made of a metal oxide on at least one surface of the solid electrolyte layer 10, and is used for a fuel cell. The solid electrolyte layer 10 and the porous body are integrally formed. The average pore diameter of the porous body is 100 m or larger, and the porosity of the porous body is 50% or higher. An electrolyte/electrode composite member 2 includes the solid electrolyte layer 10, and an electrode layer 21 formed by attaching electrode catalysts to the surface of the porous body constituting the porous body layer 11 and the surface of the porous body side of the solid electrolyte layer 10. The solid electrolyte layer 10 is reinforced by the porous body integrated with the solid electrolyte layer 10, and strength is high even when the solid electrolyte layer 10 is thin. Thinning the solid electrolyte layer 10 enables reduction of the resistance of ion conduction.