Research progress on carbon fiber papers in proton exchange membrane fuel cells
Carbon fiber papers(CPs)are currently the preferred material for the gas diffusion layer of proton exchange membrane fuel cell(PEMFC).Focusing on wet papermaking technologies,the dispersion of CPs raw materials(chopped carbon fiber)in papermaking process were analyzed,and the key factors affecting papermaking of carbon fiber,the methods for hydropho-bic modification of CPs and the treatment of microporous layers were systematically sorted out.The research situation of improving the properties of CPs at home and abroad was discussed.Finally,it was pointed out that the key to the further development of CPs in the future lies in the technological development and conversion application of key raw materials of CPs for PEMFC,and the research on the structure-property relationship as well as carbonization-graphitization mechanism in the preparation of CPs.