Archives for March 2013

What is the Difference Between Carbon Paper and Carbon Cloth Based Gas Diffusion Layers (GDL)?

Carbon Paper Gas Diffusion Layers Carbon Paper Gas Diffusion Layers (GDL) (e.g. Sigracet, Freudenberg, Toray, etc) tend to be thinner and more brittle than Carbon Cloth Gas Diffusion Layers (e.g. ELAT™, GDL-CT).  Each type has a different mass transport, porosity, hydrophobicity, and conductivity.  Papers such as Toray are quite hard and brittle, with very little compressibility.  These are good for designs where a tighter tolerance is permitted in the compression and where the thin GDL is … [Read more...]