▎ 摘　　要

NOVELTY - Preparation of porous graphene by recycling graphite anode material in waste power battery involves (1) discharging and disassembling used power batteries, obtaining a graphite negative electrode sheet, adding water, ultrasonically stripping, obtaining a dispersion, filtering, drying to obtain graphite anode material, (2) adding the graphite negative electrode material into a reaction container, passing inert gas and water vapor, heat treating, obtaining a porous graphite material, (3) mixing sulfuric acid solution and phosphoric acid solution, adding the porous graphite material and potassium permanganate, performing oil bath heat treatment, obtaining a heated suspension, (4) adding hydrogen peroxide solution to the heated suspension, centrifuging, adding the precipitate to a hydrochloric acid solution, obtaining a mixed solution, dialyzing, obtaining a porous graphene oxide solution, freeze-drying, adding into a reaction container, passing inert gas, and heat treating. USE - Preparation of porous graphene by recycling graphite anode material in waste power battery. ADVANTAGE - The method is economical and produces the product with high yield. DETAILED DESCRIPTION - Preparation of porous graphene by recycling graphite anode material in waste power battery involves (1) discharging and disassembling used power batteries, obtaining a graphite negative electrode sheet, adding the graphite negative electrode sheet to water, mixing, ultrasonically stripping, obtaining a dispersion, filtering out the precipitate, drying to obtain graphite anode material, (2) adding the graphite negative electrode material into a reaction container, sealing, vacuuming, passing inert gas and water vapor, heating up for heat treatment, obtaining a porous graphite material, (3) mixing sulfuric acid solution and phosphoric acid solution, stirring, adding the porous graphite material and potassium permanganate, performing oil bath heat treatment under stirring, obtaining a heated suspension, (4) adding hydrogen peroxide solution to the heated suspension in step (3), ultrasonically dispersing, centrifuging, discarding the supernatant and taking precipitate, adding the precipitate to a hydrochloric acid solution, adding water, stirring, obtaining a mixed solution, centrifuge washing until the pH of the mixed solution reaches 6.0-7.0, dialyzing, obtaining a porous graphene oxide solution, (5) freeze-drying the porous graphene oxide solution in step (4) to obtain the dried porous graphene oxide, (6) adding the dried porous graphene oxide in step (5) into a reaction container, sealing, vacuuming, passing inert gas, and heat treating.