▎ 摘　　要

NOVELTY - A graphene/carbon point/manganese dioxide composite material preparing method involves keeping zeolitic imidazolate framework-8 under inert gas at 500-1000 degrees C for 1-6 hour, washing with hydrochloric acid having a concentration of 3-5 vol.% and drying to obtain a carbon point, mixing water, graphene oxide and the carbon points at a mass ratio of 2-100:1:1-6, placing in a stainless steel hydrothermal kettle and heating at 100-600 degrees C for 5-15 hour to obtain a black solution. The black solution is dried at 40-140 degrees C for 6-36 hours to obtain a graphene/carbon dot composite material. The graphene/carbon dot composite material is added with water and potassium permanganate to obtain a mixed solution, where the mass ratio of water, graphene/carbon dot composite material and potassium permanganate is 10-100:1:0.2-2. The mixed solution is heated in an oil bath at 50-150 degrees C for 1-6 hours, washed and dried to obtain the finished product. USE - Method for preparing graphene/carbon point/manganese dioxide composite material. ADVANTAGE - The method enables preparing graphene/carbon point/manganese dioxide composite material with enhanced utilization degree of graphene material and electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene/carbon point/manganese dioxide composite material.