期刊
JOURNAL OF POWER SOURCES
卷 237, 期 -, 页码 291-294出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.03.054
关键词
Sol-gel; Mechanical milling; Silicon oxide; Anode material; Lithium ion batteries
资金
- National Basic Research Program of China [2013CB934003]
- National Nature Science Foundation of China [21273019]
- Guangdong Industry-Academy-Research Alliance [2009A090100020]
An amorphous SiO2/C composite anode material is synthesized via a sol gel route combining with mechanical milling and post heat-treatment processes. The synthesized amorphous SiO2/C composite presents a nanostructure composing of amorphous SiO2 cluster and coating carbon layer. The amorphous SiO2/C electrode exhibits high reversible capacity (similar to 600 mA h g(-1)), stable cycling performance and excellent rate-capability. Mechanical milling causes SiO2/C composite amorphization which makes the active material possess good electrochemical activity. The coating carbon layer can not only increase electronic conductivity, but also accommodate part of the volume expansion occurred during discharge/charge process. (C) 2013 Elsevier B.V. All rights reserved.
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