锂离子电池硅/热解聚苯胺复合负极材料的研究

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。

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	刘园园
	谢海妹
	亢一澜
	李祥高
	田建华

关键词：锂离子电池负极材料硅/热解聚苯胺球磨法

Abstract： 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 nano-silicon 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 mAh·g^-1 after 50 cycles at a current density of 400 mA·g^-1 and has the best electrochemical properties.

Keywords： lithium ion batteries； anode materials； Si/p-PANI； ball-milling

Received 2016-05-18;

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

Corresponding Authors: 田建华,E-mail:jhtian@tju.edu.cn。 Email: jhtian@tju.edu.cn

About author: 刘园园(1990-),女,硕士研究生,现从事锂离子电池硅负极材料的研究。

引用本文:

刘园园, 谢海妹, 亢一澜, 李祥高, 田建华.锂离子电池硅/热解聚苯胺复合负极材料的研究[J]. 化学工业与工程, 2018,35(5): 28-34

Liu Yuanyuan, Xie Haimei, Kang Yilan, Li Xianggao, Tian Jianhua.Study of Si/p-PANI Anode Materials for Lithium Ion Batteries[J]. Chemcial Industry and Engineering, 2018,35(5): 28-34

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