期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 36, 页码 19054-19060出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm34523d
关键词
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资金
- Independent Innovation Foundation of Shandong University, IIFSDU [2012ZD004]
- State Key Laboratory of Crystal Material [KF1105]
- National Natural Science Foundation of China [50972076, 50872072]
- Shandong Provincial Natural Science Foundation, China [Y2008F26, Y2008F40]
La-doped Li4Ti5O12 (LLTO) was prepared by a simple approach using tetrabutyl titanate, LiOH center dot H2O and La(NO3)(3)(center dot)6H(2)O as raw materials, followed by sintering the dried mixture at 600 degrees C for 5 h. Without requiring any further treatments, the as-obtained LLTO could exhibit excellent long-term cycling stability, high coulombic efficiency close to 100% at various charge-discharge rates, outstanding capacity retention at high current rates of 10-50 C, remarkable performance in the temperature range from -40 to 60 degrees C, good cycling performance even subjected to overcharging to about 10 times of the reversible capacity. The La-doped LTO could be directly used as efficient anode materials for lithium-ion batteries.
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