▎ 摘　　要

NOVELTY - Preparation of graphene comprises taking natural graphite, dispersing in solvent to obtain graphene suspension having a concentration of 3-60 g/L, where solvent is 1-methyl-2-pyrrolidone (NMP), N,N-dimethylformamide (DMF), isopropyl alcohol, n-butyl alcohol, or sodium dodecyl benzene sulfonate solution, cutting in colloid mill for 1-10 minutes at 0.1 MPa, taking out, centrifugally separating, taking the supernatant, vacuum suction filtering, drying, and obtaining the product. USE - Preparation of graphene. ADVANTAGE - The method has wide raw material sources, greatly increased production efficiency, high yield, low cost, and good dispersibility, provides product with high quality and greatly increased application range, and is suitable for industrial preparation.