Abstract
Zn-doped Li4Ti5O12 was prepared by a ball milling-assisted solid-state method, and the characters were determined by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, cyclic voltammetry, and galvanostatic charge–discharge testing. The results show that Li4Ti5−x Zn x O12 (x = 0, 0.05) exhibits the pure phase structure, and Zn doping does not change the electrochemical reaction process and basic spinel structure of Li4Ti5O12. The particle size of both samples is about 300–500 nm. The prepared Li4Ti4.95Zn0.05O12 presents an excellent rate capability and capacity retention. At the charge–discharge rate of 1C, the initial discharge capacity of Li4Ti4.95Zn0.05O12 is 268 mAh g−1. After 90 cycles at 5C, the discharge capacity of Li4Ti4.95Zn0.05O12 is obviously higher than that of Li4Ti5O12. The excellent electrochemical performance of the Li4Ti4.95Zn0.05O12 electrode could be attributed to the improvement of reversibility by doping zinc and the sub-micro particle size.
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This work was financially supported by a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Wu, D., Cheng, Y. Enhanced high-rate performance of sub-micro Li4Ti4.95Zn0.05O12 as anode material for lithium-ion batteries. Ionics 19, 395–399 (2013). https://doi.org/10.1007/s11581-012-0777-x
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DOI: https://doi.org/10.1007/s11581-012-0777-x