Preparation and characterization of novel spinel Li4Ti5O12-xBrx anode materials

Authors

Yanling Qi, University of Xinjiang, China
Yudai Haung, University of Xinjiang, China
D Z. Jia, University of Xinjiang, China
ShuJuan Bao, University of Xinjiang, China
Zaiping Guo, University of WollongongFollow

RIS ID

31427

Publication Details

Qi, Y, Haung, Y, Jia, DZ, Bao, S & Guo, Z (2009), Preparation and characterization of novel spinel Li4Ti5O12-xBrx anode materials, Electrochimica Acta, 54(21), pp. 4772-4776.

Abstract

Br-doped Li₄Ti₅O₁₂ in the form of Li₄Ti₅O_12−xBr_x (0 ≤ x ≤ 0.3) compounds were successfully synthesized via solid state reaction. The structure and electrochemical properties of the spinel Li₄Ti₅O_12−xBr_x (0 ≤ x ≤ 0.3) materials were investigated. The Li₄Ti₅O_12−xBr_x (x = 0.2) presents the best discharge capacity among all the samples, and shows better reversibility and higher cyclic stability compared with pristine Li₄Ti₅O₁₂, especially at high current rates. When the discharge rate was 0.5 C, the Li₄Ti₅O_12−xBr_x (x = 0.2) sample presented the excellent discharge capacity of 172 mAh g⁻¹, which was very close to its theoretical capacity (175 mAh g⁻¹), while that of the pristine Li₄Ti₅O₁₂ was 123.2 mAh g⁻¹ only.