Improved rate capability and cycling stability of novel terbium-doped lithium titanate for lithium-ion batteries

被引：21

作者：

Zhang, Ping ^{[1
]}

Huang, Yudai ^{[1
]}

Jia, Wei ^{[1
]}

Cai, Yanjun ^{[1
]}

Wang, Xingchao ^{[1
]}

Guo, Yong ^{[1
]}

Jia, Dianzeng ^{[1
]}

Sun, Zhipeng ^{[1
]}

Guo, Zaiping ^{[2
]}

机构：

[1] Xinjiang Univ, Inst Appl Chem, Key Lab Adv Funct Mat, Key Lab Energy Mat Chem,Minist Educ, Urumqi 830046, Xinjiang, Peoples R China

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

来源：

ELECTROCHIMICA ACTA | 2016年 / 210卷

基金：

中国国家自然科学基金;

关键词：

Lithium titanate; Terbium-doping; Rate capability; Cycling stability; Lithium ion battery; LI4TI5O12 ANODE MATERIAL; HIGH-RATE PERFORMANCE; ELECTROCHEMICAL PERFORMANCE; SOL-GEL; SPINEL; ELECTRODE; STORAGE; CONDUCTIVITY; NANOSHEETS; CAPACITY;

D O I：

10.1016/j.electacta.2016.06.017

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li4Ti4.94Tb0.06O12-delta has been synthesized via a facile co-precipitation method. The structure and morphology of the as-prepared sample have been characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and particle size distribution analysis. The results show that Tb3+ is successfully doped into the Li4Ti5O12 structure and that the average particle size is about 111 nm. Li4Ti4.94Tb0.06O12-delta exhibits a high initial discharge capacity of 166.5 mAh g(-1) at 20 C, and the discharge capacity retention is nearly 93% after 500 cycles. In addition, the sample shows much improved rate capability at 20 C compared with pure Li4Ti5O12. Tb3+ doping not only enhances the electronic conductivity, but also improves the Li+ ion diffusivity in Li4Ti5O12, which indicates that Tb3+ doping is beneficial for promoting the electrochemical performance of Li4Ti5O12. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：935 / 941

页数：7

共 42 条

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