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Synthesis and electrochemical properties of nano-Si/C composite anodes for lithium-ion batteries

YUAN Li-ye LU Chun-xiang LU Xiao-xuan YUAN Shu-xia ZHANG Meng CAO Li-juan YANG Yu

袁立业, 吕春祥, 吕晓轩, 袁淑霞, 张甍, 曹莉娟, 杨禹. 锂离子电池硅炭负极材料的制备与电化学性能研究. 新型炭材料(中英文), 2023, 38(5): 964-975. doi: 10.1016/S1872-5805(23)60707-3
引用本文: 袁立业, 吕春祥, 吕晓轩, 袁淑霞, 张甍, 曹莉娟, 杨禹. 锂离子电池硅炭负极材料的制备与电化学性能研究. 新型炭材料(中英文), 2023, 38(5): 964-975. doi: 10.1016/S1872-5805(23)60707-3
YUAN Li-ye, LU Chun-xiang, LU Xiao-xuan, YUAN Shu-xia, ZHANG Meng, CAO Li-juan, YANG Yu. Synthesis and electrochemical properties of nano-Si/C composite anodes for lithium-ion batteries. New Carbon Mater., 2023, 38(5): 964-975. doi: 10.1016/S1872-5805(23)60707-3
Citation: YUAN Li-ye, LU Chun-xiang, LU Xiao-xuan, YUAN Shu-xia, ZHANG Meng, CAO Li-juan, YANG Yu. Synthesis and electrochemical properties of nano-Si/C composite anodes for lithium-ion batteries. New Carbon Mater., 2023, 38(5): 964-975. doi: 10.1016/S1872-5805(23)60707-3

锂离子电池硅炭负极材料的制备与电化学性能研究

doi: 10.1016/S1872-5805(23)60707-3
详细信息
    通讯作者:

    袁立业,助理研究员. E-mail:cimigowatano@163.com

    吕春祥,研究员. E-mail:lucx@sxicc.ac.cn

  • 中图分类号: 127.1+1

Synthesis and electrochemical properties of nano-Si/C composite anodes for lithium-ion batteries

Funds: This work is funded by “Supported by Fundamental Research Program of Shanxi Province (20210302124312)”. We would also like to thank Shiyanjia Lab (www.shiyanjia.com) for the XRD analysis
More Information
  • 摘要: 利用微胶囊技术将酚醛树脂包覆于纳米硅表面,然后在氩气保护下高温炭化,制得硅炭复合负极材料。首先采用4种不同质量比的酚醛树脂与纳米硅制备了硅碳复合材料,得到了不同炭质厚度的硅碳复合材料。通过对其循环性能和倍率性能的比较,发现酚醛树脂与纳米硅的质量比为1∶4,即碳层厚度为4.5 nm时,电化学性能最佳。随后对该种硅碳复合材料的综合电化学性能进行了测试,该材料作为负极制备的锂离子电池具有良好的电化学性能,在电流密度为100 mA g−1的条件下,其首次放电比容量为2382 mAh g−1,首次充电比容量为1667 mAh g−1,首次库伦效率为70%。经200次充放电循环后放电比容量为835.6 mAh g−1,库伦效率为99.2%。此外,其倍率性能非常优异,在100、200、500、1000、2000及100 mA g−1电流密度下,其平均放电比容量分别为1716.4、1231.6、911.7、676.1、339.8及1326.4 mAh g−1
  • FIG. 2658.  FIG. 2658.

    FIG. 2658..  FIG. 2658.

    Figure  1.  Schematic illustration of synthesis of nano-Si/C nanocomposite

    Figure  2.  (a) Raman and (b) XRD spectra of nano-Si and nano-Si/C samples

    Figure  3.  Scanning electron microscopy (SEM) images of (a) nano-Si and (b) nano-Si/C

    Figure  4.  (a, c) TEM images of nano-Si/C; (b) SAED image for the region highlighted by red square in (a); (d) HRTEM image of nano-Si/C

    Figure  5.  TEM of nano-Si/C composite obtained by different mass ratios of phenolic resin to nano-Si: (a) 1∶2, (b) 1∶4, (c) 1∶6 and (d) 1∶8

    Figure  6.  Thermogravimetric analysis of amorphous carbon, nano-Si and nano-Si/C nanocomposites obtained by different mass ratios of phenolic resin to nano-Si

    Figure  7.  Comparison diagrams of electrochemical performance of nano-Si/C nanocomposites obtained by different mass ratios of phenolic resin to nano-Si and (a) cycle performance and (b) rate performance

    Figure  8.  FE-SEM images of nano-Si and the different nano-Si/C electrodes after 50 cycles: (a) nano-Si electrode, (b-e) nano-Si/C electrodes (Phenolic resin/nano-Si=1∶2, 1∶4, 1∶6 and 1∶8, respectively)

    Figure  9.  Electrochemical performance of nano-Si/C electrode with an amorphous carbon coating thickness of 4.5 nm: (a) the discharge and charge curves, (b) cycle voltammetry measurements, (c) cycling property at 100 mA g−1 and coulombic efficiency of nano-Si/C nanocomposite, (d) the high-rate cycling performance of nano-Si/C electrode

    Figure  10.  Nyquist plots of nano-Si and nano-Si/C electrodes

    Table  1.   Comparison of the recent work on Si-based composites as anodes for Lithium-ion batteries

    SamplesCurrent density/A g−1Cycle numberCapacity/mAh g−1 after cyclesInitial CE/%References
    Si@C-AL-zao-NO20.2015088265.0[47]
    Si@HC/CNF0.20100102153.4[48]
    Si@TiO20.4210080451.3[49]
    HSi@C0.5020088652.4[50]
    Si-PBI1.00200112860.3[51]
    nc-Si@HCS0.2525081069.0[52]
    Nano-Si/C0.1020083570.0This work
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出版历程
  • 收稿日期:  2020-09-10
  • 修回日期:  2020-10-29
  • 网络出版日期:  2022-11-03
  • 刊出日期:  2023-10-01

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