| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell superior in the electron conductivity by filling a large number of conductive oxide particles in a cylindrical air electrode tube as a structural support body with superior gas suffusion property, and bringing a part of the particles into electrical contact with an inner circumferential surface of the tube. SOLUTION: An air electrode tube 2, consisting of cylindrical porous material as a structural support body, is formed of preferably LaMnO3 perovskite-type oxide, and the strength is ensured by setting the means diameter of pores to be <=3μm. A solid electrolytic thin-film layer 3, provided with a fuel electrode 5 on the outer layer side and an inter-connector 4, are provided on the outer circumferential surface of the air electrode tube 2. A large number of conductive oxide particles 7 are filled in the air electrode tube 2, and its gas diffusion property is set to be higher than that of the air electrode tube 2, and a part of particles are brought into electrical contact with the inner circumferential surface of the air electrode tube 2, to promote the electron conductivity. As the particles 7, LaMnO3 , LaCoO3 , or LaFeO3 oxide series are included, and the grain size is preferably 1-10mm. |
