Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries

Authors

Qing-nuan ZHANG, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100080, China;
Fang-fang ZHANG, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100080, China;
Hong-xia LI, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
Bing-jun YANG, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
Xiao-cheng LI, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
Juan YANG, 1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Follow

Corresponding Author

Juan YANG(yangjuan@licp.cas.cn)

Abstract

Carbon layers with different thicknesses were introduced into the surfaces of silicon (Si) nanoparticles by sol-gel method using poly (cyclotriphosphazene-co-4, 4'-sulfonyldiphenol) as the carbon source. Technologies of X-ray diffraction, thermo-gravimetric analysis, Brunauer-Emmett-Teller and transmission electron microscopy were employed to analyze the structures and components of the as-prepared Si@C_PZS composites. Electrochemical performance of Si@C_PZS with different carbon thicknesses was studied. The results showed that Si@C_PZS with carbon thickness of 10 nm possessed the best performance. Its capacity remained 940 mAh·g^-1 after 290 cycles under 500 mA·g^-1. As the addictive, the graphite-based anode contained 30% of Si@C_PZS composite could achieve the specific capacity higher than 700 mAh·g^-1.

Graphical Abstract

Keywords

Si@C, anode, lithium ion battery, addictive of graphite

DOI Link

https://doi.org/10.13208/j.electrochem.190226

Publication Date

2020-02-28

Online Available Date

2020-02-28

Revised Date

2019-03-22

Received Date

2019-02-26

Recommended Citation

Qing-nuan ZHANG, Fang-fang ZHANG, Hong-xia LI, Bing-jun YANG, Xiao-cheng LI, Juan YANG. Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries[J]. Journal of Electrochemistry, 2020 , 26(1): 121-129.
DOI: 10.13208/j.electrochem.190226
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss1/4