Effect of Nb-doping on electrochemical stability of Li4Ti5O12 discharged to 0 V

被引：77

作者：

Tian, Bingbing ^{[1
]}

Xiang, Hongfa ^{[1
]}

Zhang, Le ^{[1
]}

Wang, Haihui ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2012年 / 16卷 / 01期

基金：

美国国家科学基金会;

关键词：

Lithium-ion batteries; Li4Ti4.95Nb0.05O12; Li4Ti5O12; Anode materials; LITHIUM-ION BATTERIES; REVERSIBLE ANODE MATERIAL; SPINEL LI4TI5O12; NEGATIVE ELECTRODE; RATE PERFORMANCE; INSERTION; CELLS; COMPOSITE; TITANATE; INTERCALATION;

D O I：

10.1007/s10008-011-1305-z

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li4Ti4.95Nb0.05O12 is synthesized by a citric acid-assistant sol-gel method. X-ray diffraction (XRD) reveals that highly crystalline Li4Ti4.95Nb0.05O12 without any impurity is obtained. The electrochemical performances of the Li4Ti4.95Nb0.05O12 and the Li4Ti5O12 in the range from 0 to 2.5 V are investigated. The Li4Ti4.95Nb0.05O12 presents a higher specific capacity and better cycling stability than the Li4Ti5O12 due to the improved conductivity. The Li4Ti4.95Nb0.05O12 exhibits a capacity as high as 231.2 mAh g(-1) after 100 cycles, which is much higher than the Li4Ti5O12 (111.1 mAh g(-1)). The effect of Nb-doping on electrochemical performance of Li4Ti5O12 discharged to 0 V has also been discussed.

引用

页码：205 / 211

页数：7

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