GAS DIFFUSION SUBSTRATE

摘要

A gas diffusion substrate comprising a non-woven network of carbon fibres wherein the carbon fibres are graphitised but the non-woven network has not been subjected to a graphitisation process is disclosed. A mixture of graphitic particles and hydrophobic polymer is disposed within the network. The longest dimension of at least 90% of the graphitic particles is less than 100mum. Processes for manufacturing the gas diffusion substrates are also disclosed. ® KIPO & WIPO 2007