Wet-chemical coordination synthesized Li3V2(PO4)3/C for Li-ion battery cathodes

Qiao Ni, Ying Bai*, Zhi Yang, Yu Li, Guanghai Chen, Liming Ling, Haixia Ren, Shi Chen, Feng Wu, Chuan Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Lithium vanadium phosphate (Li3V2(PO4)3) is one of the most promising cathode materials for developing practical Li-ion batteries due to its advantages of structural stability, low cost, relatively high energy density. For this purpose, a wet-chemical coordination approach has been applied to synthesis of the Li3V2(PO4)3/C (LVP/C) cathode materials for Li-ion batteries. The structure, morphology, and electrochemical and kinetic behaviors of LVP/C samples calcined at different temperatures are studied. The optimized Li3V2(PO4)3 sample calculated at 850 °C (denoted as LVP-850) exhibits excellent rate performance: at high rate of 0.5, 1, 5, 10 and 20 C, impressive specific capacity of 110.9, 106, 91.2, 83 and 43.6 mAh g−1 can still be attainted, respectively. Even through it recovers back to 0.1 C, the cell can still deliver a capacity of 114.4 mAh g−1 (about 97.9% of the initial capacity). Combined with cyclic voltammetry technique and ex-situ X-ray photoemission spectroscopy (XPS), the Li+ insertion/extraction reaction mechanisms are also confirmed. Such an efficient method plays a critical role in improving rate performance and cyclic reversibility of Li3V2(PO4)3 particles, and should also be appropriate for other functional electrode materials.

Original languageEnglish
Pages (from-to)49-56
Number of pages8
JournalJournal of Alloys and Compounds
Volume729
DOIs
Publication statusPublished - 2017

Keywords

  • Cathode
  • Li-ion batteries
  • LiV(PO)
  • Wet-chemical coordination approach

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Ni, Q., Bai, Y., Yang, Z., Li, Y., Chen, G., Ling, L., Ren, H., Chen, S., Wu, F., & Wu, C. (2017). Wet-chemical coordination synthesized Li3V2(PO4)3/C for Li-ion battery cathodes. Journal of Alloys and Compounds, 729, 49-56. https://doi.org/10.1016/j.jallcom.2017.09.106