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Volume 28 Issue 9
Sep.  2021

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Zhi-kun Zhao, Hui-lin Xie, Zi-yue Wen, Ling Liu, Bo-rong Wu, Shi Chen, Dao-bin Mu, and Chao-xiang Xie, Tuning Li3PO4 modification on the electrochemical performance of nickel-rich LiNi0.6Co0.2Mn0.2O2, Int. J. Miner. Metall. Mater., 28(2021), No. 9, pp. 1488-1496. https://doi.org/10.1007/s12613-020-2232-8
Cite this article as:
Zhi-kun Zhao, Hui-lin Xie, Zi-yue Wen, Ling Liu, Bo-rong Wu, Shi Chen, Dao-bin Mu, and Chao-xiang Xie, Tuning Li3PO4 modification on the electrochemical performance of nickel-rich LiNi0.6Co0.2Mn0.2O2, Int. J. Miner. Metall. Mater., 28(2021), No. 9, pp. 1488-1496. https://doi.org/10.1007/s12613-020-2232-8
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研究论文

改性Li3PO4对富镍LiNi0.6Co0.2Mn0.2O2电化学性能的影响

  • Research Article

    Tuning Li3PO4 modification on the electrochemical performance of nickel-rich LiNi0.6Co0.2Mn0.2O2

    + Author Affiliations
    • Surface deterioration occurs more easily in nickel-rich cathode materials with the increase of nickel content. To simultaneously prevent deterioration of active cathode materials and improve the electrochemical performance of the nickel-rich cathode material, the surface of nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material is decorated with the stable structure and conductive Li3PO4 by a facile method. The LiNi0.6Co0.2Mn0.2O2–1wt%, 2wt%, 3wt%Li3PO4 samples deliver a high-capacity retention of more than 85% after 100 cycles at 1 C under a high voltage of 4.5 V. The effect of different coating amounts (0–5wt%) for the LiNi0.6Co0.2Mn0.2O2 cathode is analyzed in detail. Results show that 2wt% coating of Li3PO4 gives better performance compared to other coating concentrations. Detailed analysis of the structure of the samples during the charge−discharge process is performed by in-situ X-ray diffraction. It is indicated that the modification for LiNi0.6Co0.2Mn0.2O2 cathode could protect the well-layered structure under high voltages. In consequence, the electrochemical performance of modified samples is greatly improved.

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