▎ 摘　　要

NOVELTY - Preparation of graphene oxide comprises taking graphite powder, concentrated sulfuric acid, phosphoric acid, potassium permanganate, and hydrogen peroxide as raw materials, and performing chemical reaction. USE - The method is for preparation of graphene oxide used as electrode material. ADVANTAGE - The method is simple easy to control, and has easy to obtain raw materials, low cost, and short preparation period. The prepared graphene oxide is thread-like thin, and has good water solubility, high light transmittance, large surface area, higher conductivity, and excellent cycle stability as an electrode material.