期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 167, 期 -, 页码 303-308出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2015.10.048
关键词
Composite materials; Nanostructures; Electron microscopy; Electrochemical properties
资金
- NSF of China [51474110, 51364004, 51064004]
- Guangxi Natural Science Foundation [2011GXNSFA018016]
In this report, we synthesized SnO2/modified graphite anode composite material by a simple reflux method using SnCl4 center dot 5H(2)O as tin source and modified graphite as carbon source. The as-obtained composite was investigated with the help of X-ray diffraction (XRD), scanning electron microscopy (SEM) and galvanostatic cycling tests. The results show that the composite has a wave-shaped fold structure and the SnO2 nanoparticles on it have an average size of about 50 nm. Compared to pure modified graphite, the SnO2/modified graphite exhibits a better electrochemical performance with a reversible specific capacity of 581.7 mAh g(-1) after 80 cycles, owing to high mechanical stress and elasticity of modified graphite could hinder the volume effect of SnO2 nanoparticles during the Li+ insertion/extraction process. All these favourable characters reveal that the composite is a great potential anode material in high-performance lithium ion batteries. (C) 2015 Elsevier B.V. All rights reserved.
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