The development of high specific capacitance electrode materials with high efficiency,scalability and economic feasibility is significant for the application of supercapacitors,however,the synthesis of electrode material still faces huge challenges.Herein,graphene(G)/Fe2O3 nanocomposite was prepared via a simple hydrothermal method connected with subsequent thermal reduction process.Scanning electron microscopy(SEM)and transmission electron microscopy(TEM)results showed rod-like Fe2O3 nanoparticles were prepared and well-dispersed on graphene layers,providing a rich active site and effectively buffering the aggregation of Fe2O3 nanoparticles in the process of electrochemical reaction.The specific capacitance of the obtained G/Fe2O3 nanocomposite as negative electrode for supercapacitor was 378.7 F/g at the current density of 1.5 A/g,and the specific capacitance retention was 88.76％after 3000 cycles.Furthermore,the asymmetric supercapacitor(ASC)was fabricated with G/Fe2O3 nanocomposite as negative electrode,graphene as positive electrode,which achieved a high energy density of 64.09 W-h/kg at a power density of 800.01 W/kg,maintained 30.07 W-h/kg at a power density of 8004.89 W/kg,and retained its initial capacitance by 78.04％after 3000 cycles.The excellent result offered a promising way for the G/Fe2O3 nanocomposite to be applied in high energy density storage systems.

GAO Wei;LI Yufeng;ZHAO Jitao;ZHANG Zhe;TANG Weiwei;WANG Jun;WU Zhenyu;LI Zhenyu

School of Biology and Chemistry Engineering,Panzhihua University,Panzhihua 617000,P.R.China;College of Materials Science and Engineering,Heilongjiang University of Science and Technology,Harbin 150022,P.R.China;Center of Functional Materials for Working Fluids of Oil and Gas Field,School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,P.R.China

高等学校化学研究（英文版）

[1]GAO Wei;LI Yufeng;ZHAO Jitao;ZHANG Zhe;TANG Weiwei;WANG Jun;WU Zhenyu;LI Zhenyu-.Design and Preparation of Graphene/Fe2O3 Nanocomposite as Negative Material for Supercapacitor)[J].高等学校化学研究（英文版）,2022(04):1097-1104

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