▎ 摘　　要

NOVELTY - Graphene powder comprises graphene sheet layer and dispersing agent particle composite on the graphene sheet layer, where the graphene powder is obtained by extracting the graphite through supercritical fluid slits. USE - Graphene powder useful in simultaneously requiring graphene and dispersing agent application (claimed). ADVANTAGE - The method has no pollution condition and easy control and is economical and suitable for industrial promotion and application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of preparation of graphene powder, involving (i) mixing graphite and dispersing agent to obtain graphite premix, (ii) soaking the graphite premix in a supercritical fluid again under the conditions of sealed pressure, and mixing to obtain a supercritical state mixture, and (iii) pressurizing the supercritical state mixture, and extracting slit to obtain the product.