▎ 摘　　要

NOVELTY - A foaming agent solution having concentration of 0.2-20 wt.% is prepared. 0.2-10 wt.% expanded graphite is then added to the prepared foaming agent solution, stirred for 1-5 hours and heated at 50-100 degrees C, such that the solvent is evaporated, to obtain expanded graphite-filled foaming agent. The obtained expanded graphite-filled foaming agent is heat-processed at 100-500 degrees C for 5-60 hours, to obtain graphene. USE - Preparation of graphene (claimed). ADVANTAGE - The graphene is prepared with high productivity by a simple process.