Composite body, collector member, fuel battery cell device, and fuel battery device

Abstract

[Object] To provide a composite body in which the Cr diffusion can be sufficiently reduced and conductivity is good, a collector member, a fuel battery cell device, and a fuel battery device. [Solution] The composite body includes a substrate 200 containing Cr, and a coating layer 205 covering at least a part of the substrate 200, in which the coating layer 205 includes a first layer 201 containing Cr among constituent elements excluding oxygen, and including a chromium oxide crystal, a second layer 202 disposed on the first layer 201, containing Zn, Al, and Cr among the constituent elements excluding oxygen, and including a spinel type crystal, a third layer 203 disposed on the second layer 202, containing Zn and Mn among the constituent elements excluding oxygen, and including a spinel type crystal, and a fourth layer 204 disposed on the third layer 203, containing Zn among the constituent elements excluding oxygen, and including a zinc oxide crystal.

Dependencies are inferred from the claim text.