| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining member superior in durability with respect to heat cycling by reducing electrical contact resistance between an inter-connector and an electrode film on the fuel side in a unit cell or a current collector. SOLUTION: When a fuel cell stack is formed by connecting a unit cell 4 including a solid electrolyte film 1 and electrode films 2, 3 on the fuel side and the air side respectively laminated at both surfaces of the film 1 via inter- connectors 7, a joining member is interposed between the electrode film 2 on the fuel side in the unit cell 4 or a current collector 5 and the inner-connector 7. The joining member is made of a composite material, containing NiO and LaCrO3 added with at least one kind of element selected from among Sr, Ca, Mg, Ti, Zr, V, Mn, Fe, Co, Ni, Cu, Zn, Al, Ba, Mo and Pb, wherein the content of NiO is gradually increased from the surface of the inter-connector as it nears the electrode film on the fuel side or the current collector. |
