期刊
JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
卷 3, 期 3, 页码 116-122出版社
KOREAN ELECTROCHEMISTRY SOC
DOI: 10.5229/JECST.2012.3.3.116
关键词
Silicon; Carbon nanotube; Chemical vapor deposition; Lithium ion battery; Anode
资金
- National Research Foundation of Korea (NRF) - Korea government (MEST) [NRF-2010-C1AAA001-0029031, NRF-2012-R1A2A1A01011970]
- World Class University Program [R-31-2008-000-10055-0]
As an effort to address the chronic capacity fading of Si anodes and thus achieve their robust cycling performance, herein, we develop a unique electrode in which silicon nanoparticles are embedded in the carbon nanotubes network. Utilizing robust contacts between silicon nanoparticles and carbon nanotubes, the composite electrodes exhibit excellent electrochemical performance : 95.5% capacity retention after 140 cycles as well as rate capability such that at the C-rate increase from 0.1C to 1C to 10C, the specific capacities of 850, 698, and 312 mAh/g are obtained, respectively. The present investigation suggests a useful design principle for silicon as well as other high capacity alloying electrodes that undergo large volume expansions during battery operations.
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