期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 657, 期 1-2, 页码 187-191出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2011.03.031
关键词
Lithium-ion batteries; Hard carbon spherule; Anode materials; Electrochemical property
资金
- Chinese Ministry of Education [210083]
- Ningbo University [xk1068, XYL10009]
- Zhejiang Provincial Education Department [Y200907481]
- Ningbo Natural Science Foundation [2010A610145]
Nano-sized hard carbon spherule (HCS) is prepared from the distilled water/ethylene glycol mixed solution by hydrothermal technique. The particle size of nano-sized HCS is 50-100 nm. Comparing with micro-sized HCS, nano-sized HCS displays larger specific surface area and well-dispersed property. Owing to huge specific surface area, nano-sized HCS shows lower charge transfer impedance than that of micro-sized HCS. However, nano-sized HCS also exhibits lower initial Coulombic efficiency due to the large contact area with electrolyte. Besides, charge-discharge cycling tests demonstrate nano-sized HCS shows high capacity retention ratio (92.7%) and high reversible lithium storage performance (525 mA h g(-1)). Therefore, it is a potential anode material for lithium-ion batteries. (C) 2011 Elsevier B.V. All rights reserved.
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