Preparation and Performance of Carbon-coated Si/C Composites

Authors

Li-li Du, Li-ion Batteries Lab,  School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China;
Quan-chao ZHUANG, Li-ion Batteries Lab,  School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China;Follow
Tao WEI, Li-ion Batteries Lab,  School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China;
Yong-li CUI, Li-ion Batteries Lab,  School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China;
Zhi SUN, Li-ion Batteries Lab,  School of Materials Science and Engineering, China University of Mining and technology, Xuzhou 221116, Jiangsu, China;
Shi-gang SUN, State Key Lab for Physical Chemistry of Solid Surfaces，Department of Chemistry，College of Chemistry and Chemical Engineering, Xiamen University，Xiamen 361005，Fujian, China;

Corresponding Author

Quan-chao ZHUANG(zhuangquanchao@126.com)

Abstract

Si/C composite for lithium ion batteries was obtained by pyrolyzing and ball-milling. The microstructure and component of the composite was characterized by SEM and XRD, the electrochemical performance was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvano static charge-discharge tests. The results illustrate that the particle of Si/C composite prepared by pyrolysis exhibits inerratic morphology, uniform carbon-coating layer, good electrical conductivity, low resistance. The first intercalated-lithium capacity of the composite material is 4495 mAh/g; the first coulomb efficiency is 65.3%. From the second week the coulomb efficiency maintains 97%, and the capacity at the 100th cycle can retain 438 mAh/g. The Si/C composite has good electrochemical cycle stability.

Graphical Abstract

Keywords

lithium battery, silicon, high temperature pyrolysis

DOI Link

https://doi.org/10.61558/2993-074X.2083

Publication Date

2011-05-28

Online Available Date

2011-05-06

Revised Date

2011-02-25

Received Date

2011-01-19

Recommended Citation

Li-li Du, Quan-chao ZHUANG, Tao WEI, Yong-li CUI, Zhi SUN, Shi-gang SUN. Preparation and Performance of Carbon-coated Si/C Composites[J]. Journal of Electrochemistry, 2011 , 17(2): 139-143.
DOI: 10.61558/2993-074X.2083
Available at: https://jelectrochem.xmu.edu.cn/journal/vol17/iss2/3