Study on surface coating modification of silicon anode material with titanium dioxide

Wang Shiwei; Zheng Hao; Meng Weiwei

doi:10.7513/j.issn.1004-7638.2023.05.014

Volume 44 Issue 5

Oct. 2023

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Wang Shiwei, Zheng Hao, Meng Weiwei. Study on surface coating modification of silicon anode material with titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 93-97. doi: 10.7513/j.issn.1004-7638.2023.05.014

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Wang Shiwei, Zheng Hao, Meng Weiwei. Study on surface coating modification of silicon anode material with titanium dioxide[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 93-97. doi: 10.7513/j.issn.1004-7638.2023.05.014

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Study on surface coating modification of silicon anode material with titanium dioxide

doi: 10.7513/j.issn.1004-7638.2023.05.014

Vanadium Technology Research Institute of Pangang Group Research Institute Co., Ltd., State Key Laboratory for Comprehensive Utilization of Vanadium and Titanium Resources, Panzhihua 617000, Sichuan, China

Received Date: 2023-04-10
Available Online: 2023-11-04
Publish Date: 2023-10-31

Abstract

Abstract

Titanium dioxide coated silicon (Si@TiO₂) nanocomposites with core-shell structure was prepared by hydrolysis method using TiCl₄ as titanium source and commercial nano-Si as silicon source. The materials were characterized and tested by XRD, SEM, TEM and electrochemical platform. The results show that Si@TiO₂ nanocomposites exhibit good electrochemical performance because the solid TiO₂ shell greatly alleviates the volume expansion of silicon during the charging and discharging process (showing a discharge specific capacity is of 614.3 mAh/g at a high current density of 1600 mAh/g and a specific discharge capacity of 877 mAh/g with a capacity retention rate of 51.8% after 100 cycles at a current density of 500 mAh/g).
- Si@TiO₂ nanocomposite,
- hydrolysis,
- TiCl₄,
- silicon,
- negative electrode,
- electrochemical performance

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References(14)

References

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