%0 Journal Article
%T GS-SSCNTs-MnNPs复合材料的制备与锂离子电池负极性能研究<br>The Preparation of Graphene/Super Short Carbon Nanotubes/MnO2 Nanocomposites as and Anode Performance of Lithium-Ion Batteries
%A 陈 丽
%A 邓艺民
%A 曾凡焱
%J -
%D 2017
%X 在超声环境下,采用强氧化法将多壁碳纳米管(MWCNTs)切割成长径比小于5的超短碳纳米管(SSCNTs),通过简单的湿化学法将其与MnOx纳米颗粒(MnxNPs)植入还原性氧化石墨烯片层中,热处理后,形成GS-SSCNTs-MnNPs纳米复合材料.通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X-射线衍射(XRD)等制备材料的形貌结构,采用循环伏安和恒流充放电研究其锂离子电池负极性能.结果表明:GS-SSCNTs-MnNPs纳米复合材料在180 mA?g-1电流密度下具有高达1 100 mA?h?g-1的可逆容量,且表现出优异的功率和循环稳定性能,循环100圈之后,仍具有高达837 mA?h?g-1的可逆容量(1 440 mA?g-1).<br>Multiwalled carbon nanotubes(MWCNTs)are cut into super short carbon nanotubes(SSCNTs)with aspect ratio of less than 5by using strong oxidation method under ultrasonic environment.RGO-SSCNT-MnO2nanocomposites are designed by a simple wet chemical method and heat treatment,which makes SSCNTs and MnOxnanoparticles(MnxNPs)into RGO layers.The morphology of nanocomposites is investigated by scanning electron microscopy(SEM),transmission electron microscopy(TEM)and X-ray diffraction(XRD).The performanceof anode is studied by cyclic voltammetry and constant current charge/dischargefor lithium-ion batteries.The results show that the composites have a reversible capacity of 1 100 mA?h?g-1in the current density of 180 mA?g-1,and exhibite excellent power and cycling stabilities.After 100 cycles in current density of 1 440 mA?h? g-1,the compositesstill have a reversible capacity of 837 mA?h? g-1
%K 石墨烯
%K 超短碳纳米管
%K MnO2纳米颗粒
%K 锂离子电池
%K 负极性能<br>石墨烯 超短碳纳米管 MnO2纳米颗粒 锂离子电池 负极性能
%K 石墨烯 超短碳纳米管 MnO2纳米颗粒 锂离子电池 负极性能
%K 石墨烯 超短碳纳米管 MnO2纳米颗粒 锂离子电池 负极性能
%K 石墨烯 超短碳纳米管 MnO2纳米颗粒 锂离子电池 负极性能
%K 石墨烯 超短碳纳米管 MnO2纳米颗粒 锂离子电池 负极性能
%U http://lkxb.jxnu.edu.cn//oa/darticle.aspx?type=view&id=20170413