▎ 摘　　要

NOVELTY - A graphene/zinc oxide core-shell structured composite material preparing method involves dispersing graphene into N,N-dimethyl formamide. Zinc nitrate solution and acetylacetone is mixed, dropped ammonia water into mixed solution. The solution is stirred and the solution is centrifuged or filtered, washed and dried. The zinc acetylacetonate powder is added into graphene dispersion liquid. The negative electrode is soaked into electrolytic solution by electrode activation process. The negative electrode is assembled with the positive electrode to form super capacitor. USE - Method for preparing graphene/zinc oxide core-shell structured composite material for cathode of super capacitor. ADVANTAGE - The method enables preparing the graphene/zinc oxide core-shell structured composite material with high specific capacity and better cycling stability. DETAILED DESCRIPTION - A graphene/zinc oxide core-shell structured composite material preparing method involves dispersing graphene into N,N-dimethyl formamide to obtain graphene dispersion. Zinc nitrate solution and acetylacetone is mixed, dropped ammonia water into mixed solution to adjust pH value of the solution 1-7. The solution is stirred and the solution is centrifuged or filtered, washed and dried to obtain zinc acetylacetonate powder. The zinc acetylacetonate powder is added into graphene dispersion liquid, the surface of the graphene is stirred to cover the zinc acetylacetonate, followed by transferring the solution system in zinc acetylacetonate into reaction kettle, reacting reaction kettle under hydro-thermal reaction at 50-250 degrees C for 1-48 hours, centrifuging or filtering the product, washing and drying to obtain graphene/zinc oxide core-shell structure composite material. The graphene/zinc oxide core-shell structure composite material as a cathode material, conductive agent and binding agent are mixed uniformly and coated mixed solution on the surface of collector after drying to obtain negative electrode. The negative electrode is soaked into electrolytic solution by electrode activation process. The negative electrode is assembled with the positive electrode to form super capacitor.