Toray Carbon Paper, 20 x 20 cm size. No polytetrafluoroethylene (PTFE) treatment. CAS No. 7782-42-5

Toray TGP-H is a carbon-carbon composite paper which has been used for polymer electrolyte fuel cell (PEFC) and phosphoric acid fuel cell (PAFC) for decades and has proven durability. Its high mechanical strength, conductivity and gas permeability along with minimal electrochemical corrosion are suitable for use as a gas diffusion layer (GDL) in fuel cell applications.

TGP-H is made of polyacrylonitrile (PAN) carbon fiber ("TORAYCA") featuring high tensile strengh and high modulus.
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Specifications:

Thickness········································································0.19mm
Bulk density·······························································0.44g/cm³
Porosity·················································································78%
Surface roughness Ra························································8 µm
Gas permeability····················1900 mL·mm/(cm²·hr·mmAq)
Electrical resistivity through plane·························80 mΩcm
Electrical resistivity in plane···································5.8 mΩcm
Coefficient of thermal expansion in plane [25-100℃]······ -0.8*10⁻⁶/℃
Thermal conductivity
Through plane [room temp]·····························1.7 W/(m·k)
In-plane [room temp]········································· 21 W/(m·k)
In-plane [100℃]···················································23 W/(m·k)
Flexural strength···························································40 MPa
Flexural modulus···························································10 GPa
Tensile strength···························································50 N/cm