▎ 摘　　要

NOVELTY - Method for preparing graphene involves placing squama graphite salt particles in a roller device according to a certain mass ratio, starting the roller device, rolling for a first mixing time, adding an auxiliary agent, and then rolling a second mixing time to make the squama salt particles and the auxiliary agent fully in contact, placing the mixed substance into water to dissolve, using negative pressure method to filter the solid substance, cleaning the solid material, peeling filtering, freeze-drying, placing in a vacuum furnace, heating and removing impurities to obtain graphene. USE - Preparation method of graphene is useful in material science, micro-nano processing, energy, biomedical and drug delivery. ADVANTAGE - The method provides graphene with high purity and chemical property, simple and reliable preparation method and high graphene. The method ensures only salt particles in the mixing process, friction collision between the graphite and the auxiliary agent, so that the graphene under the condition of not damaging the physical form, adsorption on the salt particle, surface the complete graphene, chemical property and simple and reliability preparation method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the graphene preparation method graphene preparation to any one of claim to to. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of one graphene preparation method of the present invention. (Drawing includes non-English language text).