▎ 摘　　要

NOVELTY - The method for producing graphene, involves (A) performing solid-liquid separation to recover concentrated sulfuric acid, after the oxidation reaction of graphite with concentrated sulfuric acid and potassium permanganate, and obtaining graphene oxide solid (I), (B) removing impurities from graphene oxide solid (I) by hydrogen peroxide and performing solid-liquid separation, washing with hydrochloric acid and water to obtain refined graphene oxide and reducing refined graphene oxide to obtain graphene. USE - Method for producing graphene for preparing battery electrode used in battery (all claimed) e.g. lithium ion battery. ADVANTAGE - The method enables production of graphene with low content of graphene metal impurities and less amount of sewage.