期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 13, 期 6, 页码 654-656出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.03.038
关键词
Lithium-ion battery; Anode; Spinel Li4Ti5O12; Nanocrystalline; Sol-gel process
资金
- Funds for Creative Research Groups of China [50821002]
We report a facile approach for synthesizing nanocrystalline Li4Ti5O12 via sol-gel process by employing a nonionic surfactant (EO)20(PO)70(EO)20 tri-block copolymer (pluronic P123) as the chelating agent. Pure-phase Li4Ti5O12 (similar to 100 nm) with high crystallinity is obtained at a sintering temperature of 700 degrees C. The cell assembled with this nanocrystalline Li4Ti5O12 presents high-rate capacity of 108 mAh g(-1) at 40 C. Furthermore, the cell exhibits excellent cycling stability, retaining over 97 % of its initial capacity after 250 charge/discharge cycles at varying rates. (C) 2011 Elsevier B.V. All rights reserved.
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