巢湖学院学报 ›› 2019, Vol. 21 ›› Issue (6): 86-94.doi: 10.12152/j.issn.1672-2868.2019.06.013

• 化学与材料科学 • 上一篇    下一篇

二氧化锡/碳纳米管纳米复合材料的制备及电化学性能

巢湖学院  化学与材料工程学院,安徽  巢湖  238000   

  1. 巢湖学院化学与材料工程学院
  • 收稿日期:2019-06-25 出版日期:2019-11-25 发布日期:2020-03-13
  • 通讯作者: 许小兵(1988-),男,安徽合肥人,巢湖学院化学与材料工程学院讲师,主要从事功能复合材料研究。
  • 作者简介:许小兵(1988-),男,安徽合肥人,巢湖学院化学与材料工程学院讲师,主要从事功能复合材料研究。
  • 基金资助:
    安徽高校自然科学研究项目(项目编号:KJ2019A0686);巢湖学院科研启动基金项目(项目编号:KYQD-201713);巢
    湖学院科研项目(项目编号:XLY-201916)

Preparation and Electrochemical Performance of Tin Oxide/Carbon Nanotube Nanocomposites

School of Chemistry and Material Engineering, Chaohu Universit, Chaohu Anhui 238000   

  1. School of Chemistry and Material Engineering, Chaohu University
  • Received:2019-06-25 Online:2019-11-25 Published:2020-03-13
  • Contact: XU Xiao-bing:School of Chemistry and Material Engineering, Chaohu University
  • About author:XU Xiao-bing:School of Chemistry and Material Engineering, Chaohu University
  • Supported by:
    KJ2019A0686;KYQD-201713;XLY-201916

摘要: 目前,用于商业锂离子电池的负极材料主要为石墨材料,实际上二氧化锡(SnO2)的理论容量远大于石墨,但是,其能形成大的首次不可逆容量及由锂锡合金引起的体积膨胀而造成低的容量保持率。碳纳米管(MWCNTs)与石墨相比,碳纳米管不仅具有更高的容量也可以被用作基体框架形成金属与碳管复合材料,这样既可以利用金属的高容量性能,也可以防止其粉化。本实验主要采用化学沉积法制备SnO2/MWCNTs纳米复合材料,二氧化锡可以沉积在碳纳米管的内部和表面。研究MWCNTs 的含量及管径大小对SnO2/MWCNTs 纳米复合材料的结构和性能的影响,证实其的确对锂离子电池的可逆容量和循环稳定性有着很大的影响。

关键词: 二氧化锡, 多壁碳纳米管, 功能化, 锂离子电池

Abstract: Anode materials in many commercial lithium-ion batteries are composed of graphite. In fact, theoretical capacities of SnO2 are far greater than that of graphite. But it also results in a large initial irreversible capacity and a poor capacity retention due to the volume expansion/contraction of Sn during alloying/dealloying reactions with Li+. MWCNTs not only have a higher capacity than graphite, but also they can be used as a support matrix forming novel metal/MWCNT composites which can take advantage of the higher capacity of metals and prevent the problem of pulverization too. In this work, SnO2 /MWCNTs nanocomposites were fabricated by chemical deposition method.SnO2 nanoparticles can be deposited on the outside and inner surfaces of the MWCNTs. It was proved that the content and inner diameter of MWCNTs in the nanocomposite electrodes indeed played a dominant role in improving the reversible capacity and cycling stability of lithium-ion batteries.

Key words: tin oxide, multi-walled carbon nanotubes, functionalization, lithium ion batteries

中图分类号: 

  • TB33