SOLID ELECTROLYTE FOR SOLID OXIDE FUEL CELL, AND SOLID OXIDE FUEL CELL INCLUDING THE SOLID ELECTROLYTE

摘要

PURPOSE: A solid electrolyte for a solid oxide fuel cell is provided to prevent a reaction between a solid electrolyte and an anode by forming a high density coating layer between the anode and the solid electrolyte, the diffusion of an anode material, and the increase of resistance. CONSTITUTION: A solid electrolyte for a solid oxide fuel cell comprises a zirconia based solid electrolyte(11), and a composite coating layer(12) formed on one side of the zirconia based solid electrolyte. The composite has a composition in chemical formula 1: (1-y)(Ce_(1-x)L'O_2)+y(L"MO_3). In chemical formula 1, L' and L" are respectively one or more element selected from lanthanoids, M is one or more elements selected from aluminum, gallium, indium, and scandium, x is a number from 0.0001-0.3, and y is a number from 0.0003-0.05.