▎ 摘　　要

NOVELTY - A composite graphene conductive agent, comprising carbon black, carbon nanotubes and graphene with a mass ratio of 1-4:0.5-4.5:1-3.5. The preparation method includes the following steps: (1) Prepare 5-7wt. % Carbon black, carbon nanotubes and graphene; 0.5-1.3wt% of a surfactant; and 80-93wt% of a solvent; (2) adding carbon black, carbon nanotubes and graphene to the solvent To obtain a premixed liquid; (3) add the interface active agent to the premixed liquid and stir for 30-60min; and (4) subject the premixed liquid obtained in step (3) to high-pressure dispersion treatment and homogenously stir for 3-6h ; Obtain a composite graphene conductive agent with a solid content of 4-7wt%. The composite graphene conductive agent can be used to prepare conductive slurry of lithium batteries and used in the positive electrode of lithium batteries to improve the conductive efficiency of lithium batteries.