Patent ID: 7704624

Claim:
A fuel cell bipolar plate comprising a laminated molded item formed by a sheet-shaped molding material, wherein said sheet-shaped molding material contains resin and a carbon material, said laminated molded item has a laminated structure of surface layer C/inner layer B/central layer A/inner layer B′/surface layer C′ arranged in this sequence, each of said central layer A, said inner layer B, said inner layer B′, said surface layer C, and said surface layer C′ consists of a single layer or a multilayer of said sheet-shaped molding material, and the carbon material content a in said central layer A, the carbon material content b in said inner layer B, the carbon material content b′ in said inner layer B′, the carbon material content c in said surface layer C and the carbon material content said surface layer C′ satisfy the following relationships: 55≦a≦85 55≦c≦85 55≦c′≦85 10 ≦a−b≦ 30 10 ≦c−b≦ 30 10 ≦a−b′≦ 30 10 ≦c′−b′≦ 30 (where the unit of a, b, b′, c and c′ is volume %).