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Power/Alternative Energy  

Fuel cell GDL features carbon fibre fabric

Posted: 22 Sep 2010     Print Version  Bookmark and Share

Keywords:gas diffusion layer  GDL  fuel cells 

Toho Tenax reveals a gas diffusion layer (GDL) made of a carbon fibre fabric that claims to offer better flexibility and strength than the commonly used paper-type GDLs, which are carbon fibre sheets impregnated with resin or other materials. The GDL, scheduled for release in September 2010, is designed for use as an electrode component for fuel cells.

Fabric GDL

The fabric structure enables roll-to-roll processing to be performed at high speeds, allowing a reduction in user costs. Furthermore, since resin or such is not needed, water permeability can be further enhanced, permitting higher output of fuel cells.

The product also claims lower contact resistance than conventional fabric-type GDLs, attained by making a uniform textile surface utilising various technologies refined by Toho Tenax, such as spinning, weaving, and carbonizing technologies. With low contact resistance, more improvements in fuel cell performance can be expected.

The GDL will be available in two thicknesses: 260µm and 320µm. Based on market needs for smaller fuel cells, the development of ultra-thin fabrics with thicknesses of 200µm and less is also underway.





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