| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell which maintains high ion conductivity and strength of a solid electrolyte and in which power generation performance is not deteriorated even if operated at low temperatures of 500°C-700°C. <P>SOLUTION: An oxygen electrode layer is formed on one of the surface of a support substrate through a solid electrolyte layer consisting of a perovskite type compound oxide of a lanthanum gallate system, and a fuel electrode layer is formed on the other surface of the support substrate through a reduction prevention film consisting of ZrO<SB>2</SB>in which a rare earth element is solid solved, and the support substrate is formed of a complex oxide having a composition expressed by a formula: (CeO<SB>2</SB>)<SB>1-z</SB>(Ln<SB>1.5</SB>)<SB>z</SB>. In the formula, Ln is at least one kind of element selected from Sm, Ho, Gd, Y, Yb, and Dy, and z is a number to satisfy 0.1≤z≤0.3. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
