Porous and electrically conductive material is the kind of material that is used for gas diffusion backings. Usually, the gas diffusion layer is single or composite, and the last means that there is a junction with a micro-porous layer. Water management and electrical properties can be improved with a treatment composed of fluoropolymer and carbon black . Diffusion of the reactant gases to the membrane/electrode assembly are improved with these material types. The structure is made it so that it spreads out the gas to maximize the contact surface area of the catalyst layer membrane. Carbon cloth and carbon paper are the most usually used GDL materials. The purpose of the GDL is to limit the amount of water that reaches the membrane/electrode assembly. Additionally, it helps with the removal of liquid water from the cathode side to prevent excess flooding. One required characteristic for this layer is that it has to be water-proofed so that the layer does not get clogged with wat...
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