▎ 摘　　要

NOVELTY - Preparation of graphene organic dispersion solution involves mixing graphite powder, organic solvent and hyperbranched polyethylene, obtaining mixture, performing ultrasonic dispersion on the obtained mixture, obtaining graphene initial dispersion solution, centrifuging, obtaining graphene dispersion solution containing excessive hyperbranched polyethylene, performing ultra-high-speed centrifugation or vacuum filtration of the obtained graphene dispersion solution to remove excessive hyperbranched polyethylene, and performing ultrasonic dispersion. USE - Preparation of graphene organic dispersion solution (claimed). ADVANTAGE - The method provides graphene organic dispersion solution with suppressed surface defect concentration of graphene. DETAILED DESCRIPTION - Preparation of graphene organic dispersion solution involves mixing graphite powder, organic solvent and hyperbranched polyethylene, obtaining mixture, performing ultrasonic dispersion on the obtained mixture, obtaining graphene initial dispersion solution, centrifuging under low speed, obtaining graphene dispersion solution containing excessive hyperbranched polyethylene, performing ultra-high-speed centrifugation or vacuum filtration of the obtained graphene dispersion solution to remove excessive hyperbranched polyethylene, and performing ultrasonic dispersion in the organic solvent. The organic solvent is chosen from tetrahydrofuran, trichloromethane, n-heptane, chlorobenzene and dichloromethane.