▎ 摘　　要

NOVELTY - A graphene-like carbon nanosheet material preparing method involves placing the cellulose precursor and activator in a mortar for thorough mechanical grinding, or formulating the solution, and mixing by ordinary drying or freeze drying, placing mixed composite in the porcelain boat, placing the mixed precursor in a tube furnace, heating at certain temperature under inert atmosphere for certain period of time, washing the calcined sample, thoroughly cleaning sample in dilute hydrochloric acid and deionized water to remove impurities, and drying in an oven to obtain the finished product. USE - Method for preparing graphene-like carbon nanosheet material for use as electrode material of supercapacitor (claimed). ADVANTAGE - The method enables preparing graphene-like carbon nanosheet material with high specific surface area and specific capacity, multilevel pore structure and excellent capacitance performance, is simple and cost effective manner.