Silicon/Needle Coke Composites as Efficient Anodes for Lithium Ion Batteries

In this research, a facile method was reported to prepare silicon/carbon composites by heating Si nanosheets and coal-based needle cokes in the assistance of binder glucopyranose. The microstructures and electrochemical performances of samples were analyzed. It was found that Si nanosheets adhered t...

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Bibliographic Details
Published in:MATEC web of conferences 2022, Vol.363, p.1022
Main Authors: Xia, Jing, Li, Shuxiang, Gao, Yuan, Zhang, Dakui, Li, Qiongguang, Wang, Yanhong
Format: Article
Language:English
Subjects:
Anodes
Composite materials
Lithium-ion batteries
Nanosheets
Rechargeable batteries
Silicon
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Summary:In this research, a facile method was reported to prepare silicon/carbon composites by heating Si nanosheets and coal-based needle cokes in the assistance of binder glucopyranose. The microstructures and electrochemical performances of samples were analyzed. It was found that Si nanosheets adhered to needle cokes forming silicon/carbon composites. Compared with needle cokes, the composites showed higher capacity and initial coulombic efficiency. Also, they improved the cycle stability of silicon materials. The silicon/carbon anode had a reversible capacity of 381.8 mAh/g at a current density of 100 mA/g after 170 cycles. In our work, relatively inexpensive Si nanosheets and coal-based needle cokes with low price were employed as the silicon and carbon sources respectively. Therefore, this method provides a possible strategy to reduce costs of silicon/carbon anodes, accelerating their commercial applications.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/202236301022