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Size effect of Si particles on the electrochemical performances of Si/C composite anodes |
Bonan Liu(刘柏男)1,2, Hao Lu(陆浩)1,2, Geng Chu(褚赓)3, Fei Luo(罗飞)4, Jieyun Zheng(郑杰允)1, Shimou Chen(陈仕谋)3, Hong Li(李泓)1,2 |
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Key Laboratory of Green Process Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
4 Tianmu Energy Anode Material Ltd. Co., Changzhou 213300, China |
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Abstract A series of Si/C composites were fabricated based on pitch and Si powders with particle sizes of 30, 100, 500, and 3000 nm. The size effects of the Si particles in the Si/C composites were investigated for lithium-ion battery anodes. The nanoscale Si and Si/C composites exhibited good capacity retentions. Scanning electron microscopy showed that exterior and interior cracks emerging owing to volume expansion as well as parasitic reactions with the electrolyte could well explain the performance failure.
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Received: 29 April 2018
Revised: 24 May 2018
Accepted manuscript online:
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PACS:
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82.47.Aa
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(Lithium-ion batteries)
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65.40.gk
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(Electrochemical properties)
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82.45.Fk
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(Electrodes)
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62.23.Pq
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(Composites (nanosystems embedded in a larger structure))
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Fund: Project supported from the “Strategic Priority Research Program” of the Chinese Academy of Sciences (Grant No. XDA09010102). |
Corresponding Authors:
Hong Li
E-mail: hli@iphy.ac.cn
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Cite this article:
Bonan Liu(刘柏男), Hao Lu(陆浩), Geng Chu(褚赓), Fei Luo(罗飞), Jieyun Zheng(郑杰允), Shimou Chen(陈仕谋), Hong Li(李泓) Size effect of Si particles on the electrochemical performances of Si/C composite anodes 2018 Chin. Phys. B 27 088201
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