Journal of Solid State Electrochemistry

, Volume 18, Issue 10, pp 2857–2862 | Cite as

Effect of Al2O3 -coating on the electrochemical performances of Li3V2(PO4)3/C cathode material

Original Paper
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Abstract

The effect of Al2O3 -coating on Li3V2(PO4)3/C cathode material for lithium-ion batteries has been investigated. The crystalline structure and morphology of the synthesized powders have been characterized by XRD, SEM, and HRTEM, and their electrochemical performances are evaluated by CV, EIS, and galvanostatic charge/discharge tests. It is found that Al2O3 -coating modification stabilizes the structure of the cathode material, decreases the polarization of electrode and suppresses the rise of the surface film resistance. Electrochemical tests indicate that cycling performance and rate capability of Al2O3-coated Li3V2(PO4)3/C are enhanced, especially at high rates. The Al2O3-coated material delivers discharge capacity of 123.03 mAh g−1 at 4 C rate, and the capacity retention of 94.15 % is obtained after 5 cycles. The results indicate that Al2O3 -coating should be an effective way to improve the comprehensive properties of the cathode materials for lithium-ion batteries.

Keywords

Cathode material Al2O3 -coating Li3V2(PO4)3 Electrochemical performance 
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Notes

Acknowledgments

This work was financially supported by the Natural Science Foundation of Hebei Province (Contact No. B2011203074).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Key Laboratory of Applied Chemistry, Hebei Province, College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdaoChina
  2. 2.State Key Laboratory of Metastable Material Science and TechnologyYanshan UniversityQinhuangdaoChina

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