▎ 摘　　要

NOVELTY - Preparation of graphene-coated cathode material comprises preparing graphene solution and cathode material solution, adjusting pH of graphene solution, adding dispersant to control zeta potential of graphene solution, adjusting charge of graphene solution to be opposite to charge of cathode material solution, ultrasonicating treated graphene solution, adding cathode material solution, stirring mixture for electrostatic attraction, filtering obtained slurry, washing residue, drying, and sintering under air or inert atmosphere. USE - Method for preparing graphene-coated cathode material used for lithium ion battery (claimed). ADVANTAGE - The method has low production cost, simple synthesis process, and easy-to-control reaction.