Corresponding Author

Xue-bu HU(xuebu@cqut.edu.cn)


Series of spinel lithium titanate (Li4Ti5O12) materials were synthesized by one-step solid-state reaction using lithium acetate and TiO2 as raw materials under different temperatures (750/800/850 °C) and atmospheres (N2/air). The as-prepared Li4Ti5O12 materials were investigated by thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, cyclic voltammotry and charge-discharge test to analyze their crystal structures, microstructures and electrochemical performances. The results show that the Li4Ti5O12(L-800N)material obtained at 800 °C under nitrogen atmosphere exhibited better electrochemical performance and smaller particle size. The initial discharge specific capacity of the optimized Li4Ti5O12 reached 170.7 mAh·g-1 at 1.0C with the capacity retention of 94.6% after 100 cycles. Even at the current density of 10C, the initial discharge specific capacity of 143.0 mAh·g-1 could be achieved, which demonstrated good high-rate and cycling performances.

Graphical Abstract


Li4Ti5O12, sintering atmosphere, synthesis temperature, anode material, lithium-ion battery

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