Electrochemical Performance of Graphene Nanosheets as Electrode Material for Supercapacitors
(0) Graphene nanosheets (GNSs) were prepared from flake natural graphite by oxidation, rapid expansion and ultrasonic treatment.The morphology, structure and electrochemical performance of GNSs as electrode materials for supercapacitors were systematically investigated via high-resolution transmission electron microscopy, X-ray diffraction, nitrogen adsorption and desorption isotherms and a variety of electrochemical testing techniques.The electrodes with freestanding GNSs prepared by coating method exhibited good rate capability and reversibility at high scan rates in electrochemical performances.GNS electrode with specific surface area ot1243 m2g-1 maintained a stable specific capacitance of 200 F g-1 under specific current of 0.1 Ag-for 500 cycles of charge/discharge.
Graphene nanosheets Supercapacitors Electrochemical performance
Liang-yu Li Dong-lin Zhao Dong-dong Zhang
State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
581-586
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）