▎ 摘　　要

NOVELTY - Preparation of graphene using graphite micropowder as raw material by ultrasonic stripping comprises adding natural flake graphite powder with certain granularity and purity of 99-100% to an organic solvent dissolved with alkali metal compound; performing ultrasonic dispersion treatment at 20-100 degrees C for 8-50 hours, where ultrasonic frequency is not less than 10 kHz; filtering or centrifuging; cleaning; and drying the mixture in vacuum to obtain mixed product comprising n atom layers of graphene, where n is 1-5. USE - Preparation of graphene (claimed). ADVANTAGE - Compared with the prior art, the method has simple operation, high stripping efficiency, fewer graphene defects, and no wastewater; and is easy for industrial production.