▎ 摘　　要

NOVELTY - Preparing graphene from exfoliated graphite, comprises placing graphite, abrasives and sulfuric acid in a grinding device to obtain a mixture, separating abrasives and sulfuric acid from the mixture, washing, and drying to obtain a graphene. USE - The method is useful for preparing graphene from exfoliated graphite (claimed), where the graphene is useful in battery materials, composite materials, electronic devices, energy storage materials and other applications. ADVANTAGE - The method is capable of rapidly and economically preparing the crystalline graphene from exfoliated graphite with high conductivity.