| abstract |
(57) [Problem] To produce a separator having sufficient conductivity and gas impermeability by a simple production method. SOLUTION: In order to manufacture the separator 30 of the present invention, first, a raw material powder including a carbon powder and a binder is prepared (Step S100). Here, the amount of the binder to be used is a theoretical value for closing the voids formed in the carbon member obtained by the press molding, assuming that only the carbon powder is press-molded under the conditions of the subsequent hot press molding. The amount is smaller than the amount of binder required for (1). The raw material powder thus prepared is subjected to hot press molding in a mold to obtain a separator member. The separator member is impregnated with a predetermined impregnating agent (step S130), and after cleaning the surface, the impregnating agent is thermally cured to complete the separator 30. |