SOLID OXIDE FUEL BATTERY AND MANUFACTURING METHOD FOR SOLID OXIDE FUEL BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a solid oxide fuel battery and manufacturing method for the battery that are capable of suppressing oxidation of a fuel electrode and leak current between cells.SOLUTION: A solid oxide fuel battery includes a cell stack 101 comprising: a plurality of fuel battery cells 105, each of which comprises a fuel electrode 109, a solid electrolyte film 111, and an air electrode 113 on a substrate 103; and an interconnector 107 for electrically connecting adjacent fuel battery cells 105. A gradient of one end of the fuel electrode 109 to the substrate 103's surface is gentler than that of the other end of the fuel electrode 109 to the substrate 103's surface. A surface of the substrate 103's part positioned at the other end's side, of the substrate 103's parts positioned between adjacent fuel electrodes 109, is in contact with a solid electrolyte film 111; a surface of the remaining part of the substrate 103's parts is in contact with an interconnector 107. The minimum film thickness of the solid electrolyte film 111's part at the tip of the other end is larger than the thickness of the solid electrolyte film 111's part positioned on the fuel electrode 109's surface.SELECTED DRAWING: Figure 1