锂离子电池硅/热解聚苯胺复合负极材料的研究  

Study of Si/p-PANI Anode Materials for Lithium Ion Batteries

作　　者：刘园园[1] 谢海妹 亢一澜[2] 李祥高[1,3] 田建华 Liu Yuanyuan;Xie Haimei;Kang Yilan;Li Xianggao;Tian Jianhua(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;School of Mechanical Engineering,Tianjin University,Tianjin 300350,China;Tianjin Engineering Research Center of Functional Fine Chemicals,Tianjin 300350,China)

机构地区：[1]天津大学化工学院,天津300350 [2]天津大学机械学院,天津300350 [3]天津市功能精细化学品技术工程中心,天津300350

出　　处：《化学工业与工程》2018年第5期28-34,共7页Chemical Industry and Engineering

基　　金：天津市科技创新平台计划(14XGCCX00017);天津市重点基金项目(14JCZDJC32400)

摘　　要：以纳米硅为原料,聚苯胺(PANI)为碳源,通过球磨法和高温热解制备了硅/热解聚苯胺(Si/p-PANI)复合物作为锂离子电池负极材料,并研究了热解温度对复合材料性能的影响。采用XRD、SEM、TEM、FTIR及XPS方法对复合材料的结构、形貌和组成进行了表征;采用恒流充放电和CV等方法测试了材料的电化学性能。研究结果表明,Si/p-PANI可以抑制纳米硅颗粒之间的团聚,并形成良好的导电网络。700℃热解后得到的Si/p-PANI在400 mA·g^(-1)电流密度下循环50次,可逆比容量为1 051.1 mAh·g^(-1),具有良好的电化学性能。Si and pyrolized PANI composites（ Si/p-PANI） used as anode materials for lithium ion batteries,were prepared by ball-milling and high temperature pyrolysis at different temperatures,using nanosilicon as raw material and polyaniline（ PANI） as carbon source. The structure,morphology and electrochemical properties of the Si/PANI and Si/p-PANI composites were characterized by XRD,SEM,TEM,FTIR,XPS,constant current charge-discharge and cyclic voltammetry（ CV） methods. The results show that Si/p-PANI composites can prevent the agglomeration of nano-silicon particles and form a good conductive network. Si/p-PANI composite pyrolized at 700 ℃ exhibits a reversible capacity of 1 051. 1 m Ah·g^-1 after 50 cycles at a current density of 400 m A·g^-1 and has the best electrochemical properties.

关 键 词：锂离子电池 负极材料 硅/热解聚苯胺 球磨法 

分 类 号：TM911[电气工程—电力电子与电力传动]