Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

doi:10.1088/1674-1056/28/6/068201

中国物理B ›› 2019, Vol. 28 ›› Issue (6): 68201-068201.doi: 10.1088/1674-1056/28/6/068201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

Hao Lu(陆浩), Junyang Wang(汪君洋), Bonan Liu(刘柏男), Geng Chu(褚赓), Ge Zhou(周格), Fei Luo(罗飞), Jieyun Zheng(郑杰允), Xiqian Yu(禹习谦), Hong Li(李泓)

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences(CAS), Beijing 100049, China;
3 CAS Research Group on High Energy Density Lithium Batteries for EV, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
4 Key Laboratory of Green Process Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
5 Tianmulake Excellent Anode Materials Co., Ltd., Changzhou 213300, China

收稿日期:2019-03-01 修回日期:2019-03-23 出版日期:2019-06-05 发布日期:2019-06-05
通讯作者: Xiqian Yu, Hong Li E-mail:hli@iphy.ac.cn;xyu@iphy.ac.cn
基金资助:
Project supported by the State Grid Technology Project, China (study on the mechanism and characterization of lithium dendrite growth in lithium ion batteries, Project No. DG71-17-010), the National Key Research and Development Program of China (Grant No. 2017YFB0102004), and the National Natural Science Foundation of China (Grant No. 51822211).

Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

Hao Lu(陆浩)^1,2, Junyang Wang(汪君洋)^1,2, Bonan Liu(刘柏男)³, Geng Chu(褚赓)⁴, Ge Zhou(周格)^1,2, Fei Luo(罗飞)⁵, Jieyun Zheng(郑杰允)^1,2, Xiqian Yu(禹习谦)^1,2, Hong Li(李泓)^1,2

1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences(CAS), Beijing 100049, China;
3 CAS Research Group on High Energy Density Lithium Batteries for EV, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
4 Key Laboratory of Green Process Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
5 Tianmulake Excellent Anode Materials Co., Ltd., Changzhou 213300, China

Received:2019-03-01 Revised:2019-03-23 Online:2019-06-05 Published:2019-06-05
Contact: Xiqian Yu, Hong Li E-mail:hli@iphy.ac.cn;xyu@iphy.ac.cn
Supported by:
Project supported by the State Grid Technology Project, China (study on the mechanism and characterization of lithium dendrite growth in lithium ion batteries, Project No. DG71-17-010), the National Key Research and Development Program of China (Grant No. 2017YFB0102004), and the National Natural Science Foundation of China (Grant No. 51822211).

摘要/Abstract

摘要：

Silicon monoxide (SiO) has been considered as one of the most promising anode materials for next generation high-energy-density Li-ion batteries (LiBs) thanks to its high theoretical capacity. However, the poor intrinsic electronic conductivity and large volume change during lithium intercalation/de-intercalation restrict its practical applications. Fabrication of SiO/C composites is an effective way to overcome these problems. Herein, a series of micro-sized SiO@C/graphite (SiO@C/G) composite anode materials, with designed capacity of 600 mAh·g^-1, are successfully prepared through a pitch pyrolysis reaction method. The electrochemical performance of SiO@C/G composite anodes with different carbon coating contents of 5 wt%, 10 wt%, 15 wt%, and 35 wt% is investigated. The results show that the SiO@C/G composite with 15-wt% carbon coating content exhibits the best cycle performance, with a high capacity retention of 90.7% at 25 ℃ and 90.1% at 45 ℃ after 100 cycles in full cells with LiNi_0.5Co_0.2Mn_0.3O₂ as cathodes. The scanning electron microscope (SEM) and electrochemistry impedance spectroscopy (EIS) results suggest that a moderate carbon coating layer can promote the formation of stable SEI film, which is favorable for maintaining good interfacial conductivity and thus enhancing the cycling stability of SiO electrode.

关键词: lithium-ion battery, silicon monoxide, carbon coating, anode material

Abstract:

Key words: lithium-ion battery, silicon monoxide, carbon coating, anode material

中图分类号: (Lithium-ion batteries)

82.47.Aa

65.40.gk (Electrochemical properties) 82.45.Fk (Electrodes) 62.23.Pq (Composites (nanosystems embedded in a larger structure))

陆浩, 汪君洋, 刘柏男, 褚赓, 周格, 罗飞, 郑杰允, 禹习谦, 李泓. Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials[J]. 中国物理B, 2019, 28(6): 68201-068201.

Hao Lu(陆浩), Junyang Wang(汪君洋), Bonan Liu(刘柏男), Geng Chu(褚赓), Ge Zhou(周格), Fei Luo(罗飞), Jieyun Zheng(郑杰允), Xiqian Yu(禹习谦), Hong Li(李泓). Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials[J]. Chin. Phys. B, 2019, 28(6): 68201-068201.

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Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

Influence of carbon coating on the electrochemical performance of SiO@C/graphite composite anode materials

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