▎ 摘　　要

NOVELTY - The method involves chemically modifying graphene oxide and graft anionic functional groups to prepare an aqueous dispersion of modified graphene oxide, mixing the modified graphene aqueous dispersion and the conductive polymer monomer aqueous dispersion according to the ratio to obtain an electrolyte, pre-treating the metal-based bipolar plate and soaking the metal-based bipolar plate in a sulfuric acid solution to remove the passivation film on the surface, electrodepositing the metal-based bipolar plate with a metal-based bipolar plate as the anode and the platinum plate as the cathode, and use a constant-voltage direct current (DC) power supply, and drying the deposited wet film to obtain a graphene conductive polymer composite coating. USE - Method for preparing graphene conductive polymer coating on surface of bipolar plate by electrodeposition used in technical field of graphene coatings and field of metal-based bipolar plate materials for proton exchange membrane fuel cells. ADVANTAGE - The method uses the functional group on the surface of the anionic modified graphene to the doping effect of the conductive polymer, thus promoting the electron dissociation of the polymer, and improving the conductivity of the composite coating. The method provides a kind of low resistance contact with high corrosion resistance. DESCRIPTION OF DRAWING(S) - The drawing shows the interface contact resistance measurement results of modified graphene polypyrrole composite coating, sulfuric acid-doped polypyrrole coating, and graphene oxide polypyrrole composite coating.