SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (2): 579-583.DOI: 10.1016/j.cjche.2019.11.003

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Novel synthesis of SiOx/C composite as high-capacity lithium-ion battery anode from silica-carbon binary xerogel

Xinxin Li1,2, Hebang Shi2,3, Liqiang Zhang1, Jingbo Chen4, Pengpeng Lü2,3   

  1. 1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing, Beijing 102249, China;
    2 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    3 University of Chinese Academy of Science, Beijing 100049, China;
    4 College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
  • 收稿日期:2019-08-09 修回日期:2019-09-30 出版日期:2020-02-28 发布日期:2020-05-21
  • 通讯作者: Jingbo Chen, Pengpeng Lü
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51602313 and 51764008), Science and Technology Project of Guizhou Province (Qiankehe No. 2016, 7439).

Novel synthesis of SiOx/C composite as high-capacity lithium-ion battery anode from silica-carbon binary xerogel

Xinxin Li1,2, Hebang Shi2,3, Liqiang Zhang1, Jingbo Chen4, Pengpeng Lü2,3   

  1. 1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing, Beijing 102249, China;
    2 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    3 University of Chinese Academy of Science, Beijing 100049, China;
    4 College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
  • Received:2019-08-09 Revised:2019-09-30 Online:2020-02-28 Published:2020-05-21
  • Contact: Jingbo Chen, Pengpeng Lü
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51602313 and 51764008), Science and Technology Project of Guizhou Province (Qiankehe No. 2016, 7439).

摘要: Micro/nanostructured SiOx/C composite was firstly synthesized by carbothermal reduction of silica-carbon binary xerogel. The homogeneous dispersion feature of the two components in binary xerogel contributes to effectively carbothermally reduce the O/Si atomic ratio, enhancing the electrochemical activity of the SiOx component. The micron-sized SiO x/C spheres are composed of many near-spherical nanoparticles. The synthesized SiOx/C exhibits a stable and high reversible capacity of 830 mA·h·g-1 for 100 cycles, and excellent rate-capability. The homogeneous dispersion structure of phases, the micro/nanostructure and the high electrochemical activity of SiOx component combinedly contribute the excellent electrochemical performance.

关键词: Sol-gel, Binary xerogel, Carbothermal reduction, Silicon oxide, Lithium-ion battery anode

Abstract: Micro/nanostructured SiOx/C composite was firstly synthesized by carbothermal reduction of silica-carbon binary xerogel. The homogeneous dispersion feature of the two components in binary xerogel contributes to effectively carbothermally reduce the O/Si atomic ratio, enhancing the electrochemical activity of the SiOx component. The micron-sized SiO x/C spheres are composed of many near-spherical nanoparticles. The synthesized SiOx/C exhibits a stable and high reversible capacity of 830 mA·h·g-1 for 100 cycles, and excellent rate-capability. The homogeneous dispersion structure of phases, the micro/nanostructure and the high electrochemical activity of SiOx component combinedly contribute the excellent electrochemical performance.

Key words: Sol-gel, Binary xerogel, Carbothermal reduction, Silicon oxide, Lithium-ion battery anode