聚苯胺炭柱撑石墨烯复合材料的制备及其电化学性能的研究  

Polyaniline-carbon Pillared Graphene Composite:Preparation and Electrochemical Performance

作　　者：胡茜 刘洪波[1,2] 夏笑虹[1,2] 谷智强 HU Xi;LIU Hong-Bo;XIA Xiao-Hong;GU Zhi-Qiang(College of Material Science and Engineering,Hunan University,Changsha 410082,China;Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]湖南大学先进炭材料及应用技术湖南省重点实验室,长沙410082

出　　处：《无机材料学报》2019年第2期145-151,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(51772083;51402101);湖南省自然科学基金(14JJ3059;2017JJ2008)~~

摘　　要：通过真空抽滤诱导自组装及热解还原处理,制备出具有柱撑结构的聚苯胺炭/石墨烯复合材料(PGR)。采用X射线衍射(XRD)、透射电子显微镜(TEM)、X射线电子能谱(XPS)和电化学测试等表征技术考察了聚苯胺单体(AN)与氧化石墨烯(GO)质量比对PGR结构和电化学性能的影响。结果表明,聚苯胺炭均匀分布在石墨烯(GR)片层间形成三维导电网络,有效地增大了GR的层间距,且实现了氮掺杂,显著提高了GR的结构稳定性和电化学性能; AN与GO质量比为1:1时制备的样品PGR1在100 mA/g电流密度下的首次脱锂比容量为653 mAh/g,当电流密度增大至1 A/g时,仍具有高达343 mAh/g的脱锂比容量,远高于GR的脱锂比容量(101 mAh/g),表现出优异的倍率性能。Polyaniline-carbon pillared graphene composites(PGR)were successfully prepared by vacuum extraction induced self-assembly and pyrolysis method.Effects of the mass ratio of aniline monomer(AN)and graphene oxide(GO)on structure and electrochemical properties of PGR were investigated by X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy,and electrochemical characterization.Results showed that the polyaniline-carbon pillars uniformly distributed between the graphene(GR)layers to form a three-dimensional conductive network with expanded interlayer space and nitrogen doping,which effectively improved the structural stability and electrochemical performance of GR.The as-prepared PGR with the mass ratio of AN and GO at 1:1 exhibits a high reversible capacity of 653 mAh/g at a current density of 100 mA/g and an excellent rate capability of 343 mAh/g at a current density of 1 A/g,all that is much higher than that of the GR electrode(101 mAh/g).

关 键 词：石墨烯 聚苯胺 柱撑结构 锂离子电池 负极材料 

分 类 号：TM911[电气工程—电力电子与电力传动]