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Journal of Solid State Electrochemistry

, Volume 23, Issue 7, pp 2243–2250 | Cite as

Effects of vanadium oxide coating on the performance of LiFePO4/C cathode for lithium-ion batteries

  • Yong Tao
  • Yanbing CaoEmail author
  • Guorong Hu
  • Pengwei Chen
  • Zhongdong Peng
  • Ke Du
  • Ming Jia
  • Yong Huang
  • Jin Xia
  • Luyu Li
  • Xiaoming Xie
Original Paper

Abstract

LiFePO4 cathode material is considered as prospective materials for lithium-ion batteries and attracted great interest because of excellent cyclic performance and environmentally friendliness. However, LiFePO4 material suffers from inferior electronic and Li+ conductivity, which restricts its performance at high rate. Improving the interfacial stability and the interfacial charge transfer of the electrode is a necessary method to enhance the cycle and rate capability. Herein, vanadium oxide decoration on LiFePO4/C composites was obtained via a simple wet chemical method. The results show that a moderate amount of vanadium oxide hybrid stabilizes the structure of the matrix LiFePO4 material. Vanadium oxide and the residual carbon coating construct a mixed conductive network, which optimizes the interface structure and reaction dynamics of the electrode. In addition, the charge transfer resistance of the decorated hybrid is smaller and the Li+ diffusion ability is better than pristine LiFePO4/C material. Moreover, the electrochemical performance exhibits a promising high rate capability and perfect cycle ability, showing the discharge specific capacities of 157.2, 150.6, and 131.1 mAh g−1 at 0.1 C, 1 C, and 3 C respectively. Furthermore, the capacity retention reached 90.9% after the 1000th cycle at 3 C.

Keywords

Lithium-ion battery LiFePO4 cathode Vanadium oxide  Surface modification Enhanced electrochemical performance 

Notes

Funding information

This study was supported by the Nature Science Foundation of China (Grant No. 51602352, 51774343).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yong Tao
    • 1
  • Yanbing Cao
    • 1
    Email author
  • Guorong Hu
    • 1
  • Pengwei Chen
    • 2
  • Zhongdong Peng
    • 1
  • Ke Du
    • 1
  • Ming Jia
    • 1
  • Yong Huang
    • 1
  • Jin Xia
    • 1
  • Luyu Li
    • 1
  • Xiaoming Xie
    • 1
  1. 1.School of Metallurgy and EnvironmentCentral South UniversityChangshaChina
  2. 2.Amperex Technology LimitedNingdeChina

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