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Synthesis and electrochemical performances of Li4Ti4.95Zr0.05O12/C as anode material for lithium-ion batteries

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Abstract

Spinel Li4Ti5 − x Zr x O12/C (x = 0, 0.05) were prepared by a solution method. The structure and morphology of the as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical performances including charge–discharge (0–2.5 V and 1–2.5 V), cyclic voltammetry, and ac impedance were also investigated. The results revealed that the Li4Ti4.95Zr0.05O12/C had a relatively smaller particle size and more regular morphology than that of Li4Ti5O12/C. Zr4+ doping enhanced the ability of lithium-ion diffusion in the electrode. It delivered a discharge capacity 289.03 mAh g−1 after 50 cycles for the Zr4+-doped Li4Ti5O12/C while it decreased to 264.03 mAh g−1 for the Li4Ti5O12/C at the 0.2C discharge to 0 V. Zr4+ doping did not change the electrochemical process, instead enhanced the electronic conductivity and ionic conductivity. The reversible capacity and cycling performance were effectively improved especially when it was discharged to 0 V.

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Acknowledgments

This work was supported by the National Science Foundation of China (project no. 20871036) and the Development Program for Outstanding Young Teachers in Harbin Institute of Technology (HITQNJS.2009.001).

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Authors and Affiliations

  1. Department of Chemistry, Harbin Institute of Technology, Harbin, 150001, China

    Fang Gu, Gang Chen & Zhenhong Wang

  2. College of Food Engineering of Harbin University of Commerce Chemistry Center, Harbin, 150076, China

    Fang Gu

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  1. Fang Gu
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  2. Gang Chen
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  3. Zhenhong Wang
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Correspondence to Gang Chen.

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Gu, F., Chen, G. & Wang, Z. Synthesis and electrochemical performances of Li4Ti4.95Zr0.05O12/C as anode material for lithium-ion batteries. J Solid State Electrochem 16, 375–382 (2012). https://doi.org/10.1007/s10008-011-1326-7

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  • DOI: https://doi.org/10.1007/s10008-011-1326-7

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