Abstract
The ZrO2-coated LiNi0.4Co0.2Mn0.4O2 with significantly improved electrochemical performance was successfully synthesized by molten salt method. The ZrO2-coated cathode material exhibited a significantly improved cycle performance and the rate performance. The 0.5 wt% ZrO2 coating material showed an excellently electrochemical cycleability and a high rate capability in the voltage range of 2.5–4.6 V. The capacity retention of 0.5 wt% ZrO2 coating material was 89.86% after 100 cycles at 0.5 C rate, which was much higher than that of raw material (82.02%). The discharge specific capacity was 106.13 mAh·g−1 after once activation at 0.1 C and 10 charge–discharge cycles at 5 C, which was much higher than that of raw material (81.71 mAh·g−1). The charge transfer impedance of coated material at high cut off voltage (4.6 V), as indicated by EIS results, was effectively suppressed, which precisely explained the distinct improvement of electrochemical performances.
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We declare that all data generated or analysed during this study are included in this published article [and its supplementary information files]. And the datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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This work was supported by the Major Science and Technology Research of Guangxi Department of Funded Projects (Grant No. 1114022-15).
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Liu, J., Yuan, M., Xie, T. et al. Ultrathin-ZrO2-coated LiNi0.4Co0.2Mn0.4O2 cathode material for Li-ion batteries: Synthesis and electrochemical performance. Journal of Materials Research 37, 1019–1029 (2022). https://doi.org/10.1557/s43578-022-00511-7
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DOI: https://doi.org/10.1557/s43578-022-00511-7