▎ 摘　　要

NOVELTY - Electrochemical reaction is carried out using a material formed by pressing expanded graphite as anode, metal or nonmetal electrode as cathode and liquid-phase system as electrolyte, by applying a voltage of 1-10 V and current density of 1-100 mA/cm2 between the anode and cathode, to form 1-50 layered graphene. USE - Preparation of graphene (claimed). ADVANTAGE - The graphene is economically, safely and environmentally-friendly prepared with high productivity by a simple process, with reduced energy consumption.