上海第二工业大学学报2024,Vol.41Issue(4) :359-368.DOI:10.19570/j.cnki.jsspu.2024.04.002

LA132黏结剂和SWCNTs协同改善硅碳负极的电化学性能

Synergistic Improvement of Electrochemical Performance of Silica-Graphite Anode by LA132 Binder and SWCNTs

张素娜 史淇森 杨超 燕溪溪 黎阳 孔令学 乔永民 王利军
上海第二工业大学学报2024,Vol.41Issue(4) :359-368.DOI:10.19570/j.cnki.jsspu.2024.04.002

LA132黏结剂和SWCNTs协同改善硅碳负极的电化学性能

Synergistic Improvement of Electrochemical Performance of Silica-Graphite Anode by LA132 Binder and SWCNTs

张素娜 1史淇森 1杨超 1燕溪溪 1黎阳 1孔令学 2乔永民 3王利军1
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作者信息

  • 1. 上海第二工业大学 能源与材料学院,上海 201209
  • 2. 迪肯大学 先进材料研究院,维多利亚 3216
  • 3. 郴州杉杉新材料有限公司,湖南 郴州 423400
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摘要

硅基负极由于其高容量,被认为是下一代锂离子电池的理想候选材料.然而,硅本征的低导电率和在循环过程中的大体积变化将不可避免地导致循环稳定性变差.将硅氧材料与石墨混合,添加单壁碳纳米管(single-walled carbon nanotubes,SWCNTs)得到SiO/G复合电极并与传统的黏结剂体系进行对比,探究LA132 黏结剂与SWCNTs之间的协同效应.SWCNTs的引入大大提高了SiO/G复合负极的电化学性能.当SWCNTs添加比例为 0.04%时,SiO/G-5 表现出良好的充放电性能,其可逆容量达到 616.90 mAh/g,并且具有良好的抗膨胀和循环稳定性,其性能优于传统黏结剂体系.

Abstract

Silicon-based anodes,due to their high capacity,are considered ideal candidate materials for next-generation lithium-ion batteries.However,the intrinsic low conductivity of silicon and significant volume changes during cycling inevitably lead to poor cycle stability.The silicon oxide material was mixed with graphite and single-walled carbon nanotubes(SWCNTs)were added to obtain a SiO/G composite electrode.Compare with traditional binder systems to explore the synergistic effect between LA132 binder and SWCNTs.The introduction of SWCNTs significantly enhances the electrochemical performance of the SiO/G composite anode.When the SWCNTs addition ratio is 0.04%,the SiO/G-5 exhibits excellent charge-discharge performance,achieving a reversible capacity of 616.90 mAh/g,along with good anti-swelling and cycle stability,which outperforms traditional binder systems.

关键词

锂离子电池/硅碳负极/电化学性能/极片膨胀

Key words

lithium battery/silicon-graphite anode/electrical performance/electrode expansion

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出版年

2024
上海第二工业大学学报
上海第二工业大学

上海第二工业大学学报

影响因子:0.248
ISSN:1001-4543
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