Patent ID: 8865373

Claim:
A cell for a solid oxide fuel cell comprising a Cr-containing alloy or oxide and an air electrode bonded together; wherein on the surface of said alloy or oxide, there is formed a coating layer containing a spinel oxide comprised of a first mono metal oxide and a second mono metal oxide, said first mono metal oxide having an equilibrium dissociated oxygen partial pressure at 750° C. ranging from 1.83×10 −20 to 3.44×10 −13 atm. and said second mono metal oxide having a lower equilibrium dissociated oxygen partial pressure at 750° C. than said first mono metal oxide, and the spinel oxide is selected from the group consisting of NiCo 2 O 4 , (Zn x CO 1-x ) Co 2 O 4 (0.45≦x≦1.00), TiCo 2 O 4 , MgCO 2 O 4 , and a mixture of two or more thereof.