Preparation and Modification of Li₄Ti₅O₁₂ as Anode Materials for Lithium-Ion Batteries

Authors

Jin-Long LIU
Zhou-Guang LU
Yang REN
Ya-Jie ZHU
Shan-Shan HU
Zhong PENG
Dong QIAN
You-Gen TANG

Corresponding Author

Zhou-Guang LU(luzg@sustech.edu.cn)

Abstract

Anode Material Li₄Ti₅O₁₂ for lithium-ion batteries was successfully prepared using half-solid-state method. Furthermore, carbon coating modification of Li₄Ti₅O₁₂ was also carried out. The phase structure and morphology were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM). The electrochemical properties were investigated by constant current discharge-charge tests, cyclic voltammetry and electrochemical impedance techniques. The results indicated that the electrochemical performance of Li₄Ti₅O₁₂ without modification declined seriously due to the aggregation of Li₄Ti₅O₁₂ particles. The initial discharge capacities were only 121.7 mAh.g^-1 at a rate of 0.1C and 87.6 mAh.g^-1 at a rate of 0.5C, respectively. By means of carbon coating modification, the as-synthesized composite Li₄Ti₅O₁₂/C kept the spherical morphology and showed no pronounced aggregation. At the charge-discharge rates less than 0.5C, the special capacities of Li₄Ti₅O₁₂/C were always larger than 180mAh.g-¹ during cycling，exceeding the theoretical capacity of 175 mAh.g^-1 for Li₄Ti₅O₁₂. Moreover, the modified product exhibited high rate capacities of 136, 79.9 and 58.3 mAh.g^-1 at 1, 5 and 10C, respectively. All these results indicated that the carbon coating modification greatly enhanced the electrochemical performance of the product, which displayed excellent cycling stability as well as high rate performance.

Graphical Abstract

Keywords

half-solid-state method, Li4Ti5O12, carbon coating, lithium-ion battery

DOI Link

https://doi.org/10.61558/2993-074X.2929

Publication Date

2012-08-28

Online Available Date

2012-04-30

Revised Date

2012-04-25

Received Date

2011-03-05

Recommended Citation

Jin-Long LIU, Zhou-Guang LU, Yang REN, Ya-Jie ZHU, Shan-Shan HU, Zhong PENG, Dong QIAN, You-Gen TANG. Preparation and Modification of Li₄Ti₅O₁₂ as Anode Materials for Lithium-Ion Batteries[J]. Journal of Electrochemistry, 2012 , 18(4): Article 12.
DOI: 10.61558/2993-074X.2929
Available at: https://jelectrochem.xmu.edu.cn/journal/vol18/iss4/12