AvCarb carbon fiber papers consist of high purity carbon fibers bonded together using a porous carbon matrix. Delivered on rolls, this material is used in demanding electrochemical applications including specialty batteries, fuel cells, and electrolyzers. AvCarb carbon fiber papers are unparalleled in their ability to meet the rigorous demands of electrochemical applications, including catalyst and microporous layer support, effective transport of gases and liquids, and conduction of heat and electricity in corrosive and high temperature environments. PTFE treated carbon fiber papers are available for applications in which liquid water repellency is required.