Excellent long-term cycling stability of La-doped Li4Ti5O12 anode material at high current rates

被引：89
作者：
Bai, Yu-Jun [1 ,2 ]
Gong, Chen [1 ]
Qi, Yong-Xin [1 ]
Lun, Ning [1 ]
Feng, Jun [1 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Peoples R China
[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 36期
基金：
中国国家自然科学基金;
关键词：
LOW-TEMPERATURE PERFORMANCE; LITHIUM-ION; ELECTROCHEMICAL PERFORMANCE; CATHODE MATERIALS; LIMN2O4;
D O I：
10.1039/c2jm34523d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：19054 / 19060
页数：7
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