▎ 摘　　要

NOVELTY - Graphene nanosheet is claimed. The graphene is prepared by chemical reaction method using flocculent graphene oxide (GO) as precursor. USE - Used as graphene nanosheet. ADVANTAGE - The nanosheet: is disordered, fluffy, transparent gauze-type and intrinsic wrinkles; and has large pore size, large specific surface area, high electrical conductivity, and excellent cycle stability. The method: has mature technology, low cost, and short preparation period; is easy to operate and easy to control; and utilizes cheap and easily available raw materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene nanosheet, comprising (i) reacting graphene, sodium nitrate, and concentrated sulfuric acid to obtain flocculent graphene oxide (GO) precursor, (ii) ultrasonicating in deionized water to remove graphene oxide, and (iii) preparing reduced graphene oxide by chemical reaction.