预歧化处理的高性能锂离子电池SiO/C负极材料*

doi:10.11896/j.issn.1005-023X.2017.010.003

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Abstract Starting from the SiO and sucrose, a SiO/C composite for Li-ion battery anode material with excellent electrochemical performance was prepared by the disproportionation treatment of SiO at high temperature, which was followed by mechanical milling, spray drying and pyrolysis. XRD, FTIR, XPS, SEM, TEM analysis indicated that there exist amorphous SiO, crystalline Si and SiO2 in the disproportionated SiO plates, and the prepared spherical SiO/C particles were composed of refined SiO plates, which were coated with pyrolyzed disordered carbon. The pre-disproportionated SiO/C composite exhibited an initial discharge capacity of 1 314.6 mAh/g with an initial Coulombic efficiency of 71% at 100 mA/g, and a discharge capacity of 851.2 mAh/g after 100 cycles. The capacity retention of disproportionated SiO/C composite was 78.5%, which was much higher than that for undisproportionated SiO/C composite. The excellent electrochemical performances are attributed to the disproportionation of SiO and the pyrolytic carbon coating.

Key words： lithium-ion batteries SiO/C anode material disproportionation reaction cyclic performance

Published: 08 May 2018

CLC number:

TM912.9

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	Articles by authors
	XIA Wenming
	TANG Renheng
	WANG Hui
	WANG Ying
	XIAO Fangming
	ZHU Min
	SUN Tai

Cite this article:

XIA Wenming,TANG Renheng,WANG Hui, et al. High-performance SiO/C Anode Material in Li-ion Battery by Pre-disproportionation Treatment[J]. Materials Reports, 2017, 31(10): 11-15.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.010.003 OR http://www.mater-rep.com/EN/Y2017/V31/I10/11

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