▎ 摘　　要

NOVELTY - Preparation of graphene involves preparing intercalated graphite by intercalating with intercalating agent under the protection of inert gas environment and reacting under vacuum atmosphere, carrying out ultrasonic treatment, adding intercalated graphite into ionic liquid, performing ultrasonic treatment, obtaining intermediate product, filtering, washing, and vacuum drying. USE - Preparation of graphene (claimed). ADVANTAGE - The method provides graphene by a simple process.