▎ 摘　　要

NOVELTY - Preparing graphene comprises preparing salt solution, inserting two graphite electrodes in the salt solution, connecting two graphite electrodes to the positive and negative electrodes of the power supply, adjusting voltage of the power supply to 1-8V, carrying electrolysis reaction out under constant voltage conditions, and electrolysis reaction time is 0-5 hours; increasing voltage of the power supply to 8-30V, maintaining for 0-100 hours, spliting and peeling graphite electrode to obtain peeled product, allowing to stand exfoliated product for stratification, washing, and drying. USE - The method is useful for preparing graphene. ADVANTAGE - The method is environmentally friendly, low in price and high in graphene yield. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene prepared by the method