Nisshinbo Holdings Inc.

Nisshinbo Chemical Inc.

Takehiro Okei

Kosuke Yasuda

Tomoyuki Araki

Shoya Ashizaki

Miho Iwai

This precursor sheet for a fuel cell separator comprises a conductive substrate sheet, a dense layer including first graphite particles, and a conduction layer including second graphite particles, wherein the dense layer and the conduction layer include a resin, the first graphite particles have a volume resistivity of 20 mΩ·cm or greater and a bulk density of 1.7 g/cmor greater when compressed at 30 MPa, and the second graphite particles have a volume resistivity of less than 20 mΩ·cm and a bulk density of 1.5 g/cmor greater when compressed at 30 MPa. This precursor sheet for a fuel cell separator provides a fuel cell separator that has excellent shapability and good mechanical strength, conductivity, and gas impermeability.

Precursor sheet for fuel cell separator, and fuel cell separator

Provided is a fuel cell separator precursor that is obtained by impregnating a porous sheet, which contains a conductive filler, with a resin composition that contains a thermoplastic resin and a conductive filler.

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Chiba, Japan

Takehiro Okei