In-Situ Preparation of Si@C Composite Anode Materials for Lithium Ion Batteries

In-Situ Preparation of Si@C Composite Anode Materials for Lithium Ion Batteries

Qingwei Cui> Jiang Cao Mou Fang Jianjun Li Fang Lian Li WangXiangming He*

Institute of Nuclear and New Energy Technology,Tsinghua University, Beijing 100084, PR China

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR China

State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, PR China

Beijing Key Lab of Fine Ceramics, Tsinghua University, Beijing 100084,PR China

Corresponding Author Email: 
hexm@tsinghua.edu.cn, wang-l@tsinghua.edu.cn
Page: 
219-224
|
DOI: 
https://doi.org/10.14447/jnmes.v17i4.394
Received: 
10 December 2013
|
Accepted: 
26 September 2014
|
Published: 
26 November 2014
| Citation
Abstract: 

A Si@C nanocomposite material is prepared via in-situ polymerization of acrylonitrile on the surface of silicon nanoparticles, and followed by carbonization in an inert atmosphere. The obtained Si@C nanocomposite material is composed of a nanosized Si core and a casting carbon shell. Its structure and electrochemical properties are characterized by XRD, TG, Raman, SEM, TEM and chargedischarge performance test. The results obtained in this study show that Si@C nanocomposite is coated by a layer of amorphous carbon which provides a conductive matrix and relieves the dramatically morphological changes of Si upon lithium insertion and extraction. The composite exhibits good capacity retention for use as anode in lithium-ion batteries. This study also paves a facile and industrial scalable way to prepare core/shell structure for high performance anode materials for lithium-ion batteries

Keywords: 

in-situ; polymerization; silicon-carbon composite; anode material; lithium-ion battery

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
5. Acknowledgements

We gratefully thank the Ministry of Science and Technology (Grant No. 2013CB934000, No. 2011CB935902, No.2014DFG71590, No. 2010DFA72760, No. 2011CB711202, No.2013AA050903, No. 2011AA11A257 and No. 2011AA11A254), the China Postdoctoral Science Foundation (Grant No.2013M530599 and No. 2013M540929), the Tsinghua University Initiative Scientific Research Program (Grant No. 2010THZ08116, No. 2011THZ08139, No. 2011THZ01004 and No. 2012THZ08129) , Beijing Municipal Program (Grant No.YETP0157, No. Z131100003413002 and No. Z131100003413001) , State Key Laboratory of Automotive Safety and Energy (No.ZZ2012-011) and Suzhou (Wujiang) Automotive Research Institute (Project No.2012WJ-A-01).

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