CURRENT COLLECTOR MATERIAL OF SOLID OXIDE FUEL CELL, AIR POLE CURRENT COLLECTOR, AND SOLID OXIDE FUEL CELL

PROBLEM TO BE SOLVED: To provide an air pole current collector material of a solid oxide fuel cell in which a high conductivity indispensable for lowering current collection loss and thermal expansion coefficient with good matching close to that of electrolyte material are obtained compatibly. SOLUTION: This is a complex powder in which a perovskite complex oxide powder which is expressed by general formula ABO3, and in which A is made of one or more elements selected from a group of La and rare earth element and alkali earth metal and one or more elements selected from a group of Sr, Ca, and Ba, and B is made of one or more elements selected from a group of Co, Fe, Ni, and Cu, is compounded with a low thermal expansion powder with a thermal expansion coefficient of ≤8 (10-6/°C). Specifically, the perovskite complex oxide powder is lanthanum-strontium-cobalt oxide (LSC) powder, and the low thermal expansion powder is aluminum titanate (Al2TiO5) powder, and it is preferable that the volume ratio of the perovskite complex oxide powder and the low thermal expansion powder is in the range 95:5-70:30. COPYRIGHT: (C)2010,JPO&INPIT