▎ 摘　　要

NOVELTY - Surface modification treatment of current collector involves (1) subjecting current collector plate (aluminum or copper current collector plate) to surface roughening and topography treatment, making the surface evenly distributed grooves (non-perforated), (2) feeding the current collector with grooves into vacuum heat treatment furnace, taking out and wiping with ethanol/cotton ball and N-methylpyrrolidone, obtaining current collector plate, (3) adding doped graphene material and polyvinylidene fluoride into solvent, ultrasonically processing, performing dispersion and dissolution, blending to prepare polyvinylidene fluoride/doped graphene composite materials, (4) coating the prepared polyvinylidene fluoride/doped graphene material on the groove surface of the current collector plate, drying, obtaining a coated composite current collector, assembling the prepared surface-coated current collector plate for slurry battery assembly, and testing the electrochemical performance. USE - Surface modification treatment of current collector for lithium slurry battery (all claimed). ADVANTAGE - The method enables formation of polyvinylidene fluoride and doped graphene coating on the surface of the current collector, which increases the binding force of the doped graphene and the surface of the current collector. The surface of the current collector is roughened and topographically treated, which increases the binding force of the coating layer and the current collector, and reduces the phenomenon of coating layer shedding caused by the shear force of the slurry fluid for a long time in the lithium slurry battery system. DETAILED DESCRIPTION - Surface modification treatment of current collector involves (1) subjecting current collector plate (aluminum or copper current collector plate) to surface roughening and topography treatment, making the surface evenly distributed grooves (non-perforated), (2) feeding the current collector with grooves into vacuum heat treatment furnace to maintain a constant temperature for a certain period of time, taking out and wiping with ethanol/cotton ball and N-methylpyrrolidone, obtaining current collector plate, (3) adding doped graphene material and polyvinylidene fluoride into the solvent, ultrasonically processing, performing dispersion and dissolution, blending to prepare polyvinylidene fluoride/doped graphene composite materials, (4) coating the prepared polyvinylidene fluoride/doped graphene material on the groove surface of the current collector plate, (5) drying the current collector coated with polyvinylidene fluoride /doped graphene, obtaining a coated composite current collector, (6) assembling the prepared surface-coated current collector plate for slurry battery assembly, and testing the electrochemical performance.