▎ 摘　　要

NOVELTY - Preparation of graphene by microwave expansion comprises mixing graphite raw material with intercalation agent, performing acid intercalation to obtain primary intercalated graphite slurry, adding strong alkali solution with hydroxide ion concentration of 0.1-8 mol/L until system is neutral to obtain secondary intercalated graphite slurry, microwave-heating in oven at 400-1000 degrees C for 5-300 seconds, and drying to obtain three-dimensional graphene powder. USE - Method for preparing graphene by microwave expansion. ADVANTAGE - The method has rapid microwave-heating to achieve high-efficiency layering of graphite, and prepares three-dimensional graphene powder with ultra-thin graphene sheet cluster.