▎ 摘　　要

NOVELTY - Preparation of graphene comprises assembling pole piece containing graphite material, counter electrode pole piece containing lithium, electrolyte containing propylene carbonate, and diaphragm into battery; subjecting battery into charge-discharge test; stripping graphite layers; subjecting battery into charge-discharge test; removing lithium in graphite pole piece; taking apart battery; soaking graphite pole piece into dimethyl carbonate solution; removing impurities on graphite pole piece; washing product with diluted hydrochloric acid; and drying in oven. USE - Preparation of graphene. ADVANTAGE - The method does not use expensive device, has simple operation, provides graphene through simple charge-discharge and post processing, safe and reliable, and has lower cost. DETAILED DESCRIPTION - Preparation of graphene comprises assembling pole piece containing graphite material, counter electrode pole piece containing lithium, electrolyte containing propylene carbonate (PC), and diaphragm into battery; subjecting battery into charge-discharge test; making lithium and PC in counter electrode pole piece form solvent lithium ion and enter graphite layers; stripping graphite layers one by one to form graphene material and lithium carbonate; subjecting battery into charge-discharge test; removing lithium in graphite pole piece; taking apart battery; soaking graphite pole piece into dimethyl carbonate (DMC) solution; removing impurities on graphite pole piece; washing product with diluted hydrochloric acid for several times to remove lithium carbonate; and drying in oven to obtain final product. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a process for preparation of graphene (Drawing includes non-English language text).