▎ 摘　　要

NOVELTY - Preparation of graphene involves crushing graphite raw ore to obtain micron-sized graphite powder, finely grinding micron-sized graphite powder to obtain graphite powder, adding dispersion liquid, ultrasonically-processing and filtering. USE - Preparation of graphene for lithium batteries, anticorrosive coating, heat-radiating rubber, heat-dissipating film, body armor, heat-generating floor, thermal paste, sensor and magnetic drug carriers (claimed). ADVANTAGE - The method enables simple, economical and environmentally-friendly preparation of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene prepared by the method.