Carbon Fiber Paper Gas Diffusion Layer
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In fuel cells, this thin, porous sheet will provide high electrical and thermal conductivity and chemical / corrosion resistance, and then they will the proper flow of reactant gases (hydrogen and air) and manage the water transport out of the MEA.
The GDL serves as a connection bridge between the MEA and Graphite Plate.
With MPL coating to minimize the contact resistance between the GDL and catalyst layer, it will better limit the loss of catalyst to the GDL interior and help to improve water management as it provides effective water transport.