Size effect of Si particles on the electrochemical performances of Si/C composite anodesProject supported from the "Strategic Priority Research Program" of the Chinese Academy of Sciences (Grant No. XDA09010102)

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 reten...

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Bibliographic Details
Published in:Chinese physics B 2018-08, Vol.27 (8)
Main Authors: Liu, Bonan, Lu, Hao, Chu, Geng, Luo, Fei, Zheng, Jieyun, Chen, Shimou, Li, Hong
Format: Article
Language:English
Subjects:
anode
silicon-carbon composite
size effect
solid-electrolyte interphase
volume expansion
Online Access:Get full text
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Summary: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.
ISSN:1674-1056
DOI:10.1088/1674-1056/27/8/088201