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Gas Diffusion Layers (GDL)
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 is an established electrode base material (gas diffusion layer, or "GDL") for polymer electrolyte fuel cells. GDLs are water repellent carbon papers, coated with microporous layer. GDLs are key components for polymer electrolyte fuel cells, providing high electrical and thermal conductivity together with corrosion resistance.
We manufacture GDL as well as TORAYCA™ carbon paper.
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.