| 摘要 |
PURPOSE: To provide a solid electrolyte fuel cell capable of preventing cracks or peeling off of an air electrode by using a lanthanum base composite oxide replaced with a specified element as a material for the air electrode. CONSTITUTION: In a solid electrolyte fuel cell using stabilized zirconia as an electrolyte, arranging an air electrode and a fuel electrode on each side of the electrolyte, and electrochemically reacting oxygen on the air electrode side and a fuel gas on the fuel electrode side to obtain electromotive force, the air electrode is formed with a material having perovskite structure represented by La1-x Srx Alz Mn1-y Cry O3 (0.002<=y<=0.15) obtained by adding Al to a lanthanum base composite oxide represented by La1-x Srx MnO3 and replacing part of Mu of the lanthanum base composite oxide with Cr. The content of Al is about 0.03-0.23. By using this material, the air electrode in which thermal expansion conformity and reactivity with the solid electrolyte are improved can be obtained. |
