▎ 摘　　要

NOVELTY - Preparing graphene comprises adding graphite powder to a tetrahydrofuran solution and obtaining graphite-powder tetrahydrofuran dispersion liquid by carrying out ultrasonic dispersion under the protection of nitrogen gas; adding alkali metal and naphthalene to the dispersion liquid, stirring under the protection of the nitrogen gas to obtain the mixed solution; adding halogenated organic reagent to the mixed solution, and reacting under the protection of the nitrogen gas to obtain a solid product; and washing and drying the solid product to obtain the graphene powder. USE - Method for preparing graphene (claimed). ADVANTAGE - The method has low cost and low device requirements, and is simple, easy and good for industrial production.