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

doi:10.1016/j.cjche.2019.11.003

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (2): 579-583.DOI: 10.1016/j.cjche.2019.11.003

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

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

Xinxin Li^1,2, Hebang Shi^2,3, Liqiang Zhang¹, Jingbo Chen⁴, Pengpeng Lü^2,3

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:2020-05-21 Published:2020-02-28
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).

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

Xinxin Li^1,2, Hebang Shi^2,3, Liqiang Zhang¹, Jingbo Chen⁴, Pengpeng Lü^2,3

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

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).

Abstract

Abstract: Micro/nanostructured SiO_x/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 SiO_x component. The micron-sized SiO x/C spheres are composed of many near-spherical nanoparticles. The synthesized SiO_x/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 SiO_x component combinedly contribute the excellent electrochemical performance.

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

摘要： Micro/nanostructured SiO_x/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 SiO_x component. The micron-sized SiO x/C spheres are composed of many near-spherical nanoparticles. The synthesized SiO_x/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 SiO_x component combinedly contribute the excellent electrochemical performance.

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

Xinxin Li, Hebang Shi, Liqiang Zhang, Jingbo Chen, Pengpeng Lü. Novel synthesis of SiO_x/C composite as high-capacity lithium-ion battery anode from silica-carbon binary xerogel[J]. Chinese Journal of Chemical Engineering, 2020, 28(2): 579-583.

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

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

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