期刊
ELECTROCHIMICA ACTA
卷 125, 期 -, 页码 206-217出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.01.094
关键词
Si/porous-C composite; Buffering voids; High capacity anode; Lithium-ion battery
资金
- Hundred Talents Program of Chinese Academy of Sciences (CAS)
- Shenzhen Municipal Special Fund for Development of Strategic Emerging Industries [JCYJ120120831152211489]
- Fund for Science & Technology Innovation Team of Zhoushan (Zhejiang, China)
A novel Si/porous-C composite with buffering voids was prepared by the co-assembly of phenolformaldehyde resin, SiO2 and Si nanoparticles, followed by a carbonizing process and subsequent removal of SiO2 template. Si nanoparticle was coated with a layer of porous carbon shell with rationally designed void in between which provides the accommodating space for the volume change of Si over cycling. The as-prepared composite electrode exhibited good electrochemical performances as an anode material in lithium-ion cells, showing a stable reversible capacity of 980 mAh g(-1) over 80 cycles with small capacity fade of 0.17%/cycle and high rate capability (721 mAh g(-1) at 2000 mA g(-1)). (C) 2014 Elsevier Ltd. All rights reserved.
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