Patent ID: 8703350

Claim:
A cell stack comprising: (a) a collector member for collecting current from a fuel cell, wherein the collector member is made of a heat-resistant alloy member; and (b) plural solid oxide fuel cells which are electrically connected to each other by interposing the collector member therebetween, wherein the heat-resistant alloy member comprises a Cr diffusion preventing layer is made of a metal oxide having a spinel crystal structure, wherein said metal oxide contains zinc and manganese, a coating layer made of an oxide containing Zn, in which a trivalent or higher valent positive metal element is in solid solution, is formed on the surface of the Cr diffusion preventing layer and an alloy member containing Cr, whose surface is coated with the Cr diffusion preventing layer, and wherein the Cr diffusion preventing layer and the coating layer have conductivity at temperatures of 550-900° C.