▎ 摘　　要

NOVELTY - Preparing graphene-sheet manganese dioxide, comprises e.g. dispersing the potassium permanganate into water and stirring to a particle-free state to obtain aqueous potassium permanganate solution, adding manganese sulfate to aqueous potassium permanganate solution, and stirring to obtain potassium permanganate-manganese sulfate mixture, adding graphene oxide powder to water and ultrasonically dispersing to obtain aqueous graphene oxide solution, adding the aqueous graphene oxide solution to potassium permanganate-manganese sulfate mixed solution, and stirring well to obtain mixed solution, transferring the mixed solution to a hydrothermal reaction vessel, and reacting at 120-180 degrees C for 2-24 hours to obtain reaction liquid, filtering the reaction solution and washing filtered solid with deionized water and ethanol, and drying the obtained solid to obtain final product. USE - The method is useful for preparing graphene-sheet manganese dioxide. DETAILED DESCRIPTION - Preparing graphene-sheet manganese dioxide, comprises (i) taking potassium permanganate and manganese sulfate in a molar ratio of 10:1-2:1, (ii) dispersing the potassium permanganate into water and stirring to a particle-free state to obtain aqueous potassium permanganate solution, (iii) adding manganese sulfate to aqueous potassium permanganate solution, and stirring for 0.5-2 hours to obtain a potassium permanganate-manganese sulfate mixture, (iv) taking graphene oxide powder, where the amount of graphene oxide powder is 0.5-10 wt.% mass of potassium permanganate-manganese sulfate mixture, (v) adding graphene oxide powder to water and ultrasonically dispersing to obtain aqueous graphene oxide solution, (vi) adding the aqueous graphene oxide solution to the potassium permanganate-manganese sulfate mixed solution, and stirring well to obtain a mixed solution, (vii) transferring the mixed solution prepared in the step (vi) to a hydrothermal reaction vessel, and reacting at 120-180 degrees C for 2-24 hours to obtain reaction liquid, (viii) filtering the reaction solution and washing filtered solid with deionized water and ethanol, and (ix) drying the solid obtained in step (viii) with 50-100 degrees C to obtain final product.