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化学学报 >

2012 , Vol. 70 >Issue 01: 15 - 20

DOI: https://doi.org/10.6023/A1105275

研究论文

TiO2@MWNTs纳米复合材料的制备及其储锂性能

  • 陈琳 ,
  • 申来法 ,
  • 聂平 ,
  • 苏晓飞 ,
  • 张校刚 ,
  • 李洪森
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  • a. 新疆大学化学化工学院, 乌鲁木齐 830046;
    b. 南京航空航天大学材料科学与技术学院, 南京 210016

收稿日期: 2011-05-27

  修回日期: 2011-08-02

  网络出版日期: 2012-02-25

基金资助

国家自然科学基金(Nos.20873064,21173120)以及中国高校博士点专项基金(No.20060287026).

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Preparation and Electrochemical Lithium Storage of Titanium Dioxide@Multi-walled Carbon Nanotubes(TiO2@MWNTs) Nanocomposites

  • CHEN Lin ,
  • SHEN Lai-Fa ,
  • NIE Ping ,
  • SU Xiao-Fei ,
  • ZHANG Xiao-Gang ,
  • LI Hong-Sen
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  • a. College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046;
    b. College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016

Received date: 2011-05-27

  Revised date: 2011-08-02

  Online published: 2012-02-25

Supported by

Project supported by the National Natural Science Foundation of China(Nos.20873064,21173120),Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20060287026).

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摘要

以TiOSO4为钛源,多壁碳纳米管(MWNTs)为载体,溶剂热法制备了多壁碳纳米管/二氧化钛纳米复合材料(TiO2@MWNTs),并利用XRD,SEM,TEM,N2吸附-脱附和TG-DSC等测试手段对合成产物的结构和形貌进行表征,用恒流充放电测试研究TiO2@MWNTs纳米复合材料的储锂性能.N2吸附-脱附曲线和孔径分布曲线证实TiO2@MWNTs存在多级孔道结构以及较大的比表面积.电化学测试结果表明,与纯TiO2颗粒相比,TiO2@MWNTs纳米复合材料具有更好的容量保持率和倍率性能.在1C倍率下,复合材料的可逆容量为200mAh·g-1,循环100圈后容量仍达182mAh·g-1,即使在10C大倍率下,容量约为100mAh·g-1左右.

关键词： 锂离子电池; 负极材料; TiO2@MWNTs纳米复合材料; 溶剂热

本文引用格式

陈琳 , 申来法 , 聂平 , 苏晓飞 , 张校刚 , 李洪森 . TiO2@MWNTs纳米复合材料的制备及其储锂性能[J]. 化学学报, 2012 , 70(01) : 15 -20 . DOI: 10.6023/A1105275

Abstract

The TiO2@MWNTs nanocomposites have been prepared by a simple one-step solvothermal method using low-cost TiOSO4 as the raw material in the presence of MWNTs.X-ray diffraction(XRD), scan electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption-desorption and thermogravimetric-differential scanning calorimeter(TG-DSC)analysis were performed to characterize the structures and morphologies of the TiO2@MWNTs composites.Their lithium storage properties were investigated with galvanostatic charge/discharge measurements when the composites was used as anode materials for lithium-ion batteries(LIBs).The nitrogen adsorption-desorption curve and pore size distribution verified that the TiO2@MWNTs nanocomposites had rich hierarchical pores and large specific surface area.Compared with pristine TiO2,these TiO2@MWNTs nanocomposites exhibited much higher rate capability and even better capacity retention.The reversible capacity of the nanocomposites electrode is up to 200 mAh· g-1 and remain at 182 mAh· g-1 at 1 C after 100 cycles.The reversible capacity is about 100 mAh· g-1 even at the high rate of 10 C.

Key words： lithium-ion battery; anode material; TiO2@MWNTs nanocomposites; solvothermal

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