Carbon Paper

TORAYCA™ carbon paper is a porous C/C composite (a composite material of carbon fiber and carbon) that has been heat-treated at a high temperature. Its excellent features such as high conductivity, high gas permeability, corrosion resistance, and high strength, make this a favorite base material for fuel cell electrodes and other electrode applications.

Structure and generation mechanism of polymer electrolyte fuel cells :

Generation mechanism of fuel cells:
TORAYCA™ carbon paper has been used as an electrode base material (gas diffusion layer) for phosphoric acid fuel cells and polymer electrolyte fuel cells.

Electrode reaction:
1) Anode side (fuel electrode): 2H₂ → 4H+ + 4e-
2) Cathode side (air electrode): 4H+ + O₂ + 4e- → 2H₂O

Examples of applications:

Features

High Conductivity

Carbon fiber bonds strongly to carbon, resulting in better electrical conduction.

High Strength

The carbon paper is thin, very strong and offers excellent compression characteristics.

High Gas Permeability

Its high porosity (approx. 78%) lets gases flow through the carbon paper smoothly.

Corrosion Resistance

The carbon paper is made up of carbon that has been heat-treated at a high temperature, so contains minimal impurities and exhibits excellent corrosion resistance.

Smooth Surface

Carbon fibers are oriented in the surface direction so the material has a very smooth surface with few irregularities.

Data Sheets