▎ 摘　　要

NOVELTY - A graphene/zinc-aluminum oxide composite material preparing method involves dissolving a graphite oxide precursor, a zinc salt precursor and an aluminum salt precursor in an organic solvent by adding deionized water to obtain mixture. The mixture is ultrasonically dispersed to obtain mixed solution. The mixed solution is transferred to a microwave reactor followed by setting reaction temperature, microwave power and reaction time. The microwave reactor is opened and stirred till a reaction system begins to reflux followed by slowly adding an alkali source compound and organic solvent. USE - Method for preparing a graphene/zinc-aluminum oxide composite material used in a super capacitor (claimed). ADVANTAGE - The method enables preparing graphene/zinc-aluminum oxide composite material without utilization of toxic chemical agent in reduction of graphene. DETAILED DESCRIPTION - A graphene/zinc-aluminum oxide composite material preparing method involves dissolving a graphite oxide precursor, a zinc salt precursor and an aluminum salt precursor in an organic solvent by adding deionized water to obtain mixture. The mixture is ultrasonically dispersed to obtain mixed solution. The mixed solution is transferred to a microwave reactor followed by setting reaction temperature, microwave power and reaction time. The microwave reactor is opened and stirred till a reaction system begins to reflux followed by slowly adding an alkali source compound and organic solvent dropwise from the condenser for refluxing the reaction system to obtain a reacted product. The reaction system is cooled and centrifuged to obtain precipitate. The precipitate is washed with alcohol and dried in vacuum to obtain dried product. The dried product is transferred in a tubular furnace, followed by introducing argon and hydrogen mixed gas to carry out high-temperature thermal pyrolysis to obtain a finished product that is graphene/zinc-aluminum oxide composite material, which is stirred with graphene/zinc oxide, acetylene black and PTFE to obtain foam. The foam is coated on surface of iron and zinc and assembled into super-capacitor.