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Enhanced rate performance of lithium titanium oxide anode material by bromine doping

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Abstract

Br-doped lithium titanium oxide (Li4Ti5O12) particles in the form of Li4Ti5Br x O12-x (x = 0, 0.1, 0.2, 0.3, 0.4) are synthesized via a simple liquid deposition reaction, followed by a high-temperature treatment. The effects of bromine (Br) doping on the structures and electrochemical properties of Li4Ti5O12 are extensively studied. It is found that Br atoms can enter the lattice structure and enlarge the lattice parameters of Li4Ti5O12. Although Br doping has not changed the phase composition, obvious effects on the particle’s morphology and size have been observed. Electrochemical test results indicate that the rate capability of Li4Ti5O12 has been evidently improved by Br doping at an appropriate concentration. The as-synthesized Li4Ti5O11.8Br0.2 electrode presents much higher discharge capacity and better cycle stability than that of the other electrodes. The greatly enhanced electrochemical performance of Li4Ti5O11.8Br0.2 may be attributed to the improved dispersion of nanoparticles and increased electrical conductivity.

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Acknowledgments

Financial supported from the 973 project (2013CB934001 and 2015CB932500), NSF of China (51172024, 51372022 and 51302011) are gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory of New Energy Materials and Technologies, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Haifang Ni, Wei-Li Song & Li-Zhen Fan

  2. College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, 266580, China

    Yin-Zhen Wang

Authors
  1. Haifang Ni
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  2. Wei-Li Song
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  3. Li-Zhen Fan
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  4. Yin-Zhen Wang
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Corresponding authors

Correspondence to Li-Zhen Fan or Yin-Zhen Wang.

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Ni, H., Song, WL., Fan, LZ. et al. Enhanced rate performance of lithium titanium oxide anode material by bromine doping. Ionics 21, 3169–3176 (2015). https://doi.org/10.1007/s11581-015-1508-x

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  • DOI: https://doi.org/10.1007/s11581-015-1508-x

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