Abstract
In this work, Li1.2Ni0.13Co0.13Mn0.54O2 was prepared by the sol–gel method and coated with FePO4. The experimental results show that the material surface is uniformly coated with FePO4. A small amount of coating will not change the layered structure of the material. Among them, the material with 5% FePO4 coating has the best performance. The first charge and discharge specific capacity at 0.1 C current density is 324.4 mAh g−1 and 280.4 mAh g−1, respectively. And the first coulomb efficiency is 86.4%, which is significantly higher than 75.6% of the pristine material. The improvement of the first charge–discharge performance of the coating material is due to the decrease of discharge voltage plateau and the redox of FePO4 with electrochemical activity. When the FePO4 coating content is 5%, the cycling performance of the material at 0.2 C current density is the best. After 100 cycles, the capacity decays from 268.4 to 232.9 mAh g−1, and the capacity retention rate is 86.78%, which is higher than 60.58% of the pristine sample. The discharge specific capacity of 5% coated material at 5 C rate is 134.8 mAh g−1, which is higher than 95.3 mAh g−1 of the pristine material.
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This work is supported by the Specialized Research Fund for the Technology Innovation of Foshan City (1920001001421).
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He, J., Bai, Z., Huang, X. et al. Effect of FePO4 coating on structure and electrochemical performance of Li1.2Ni0.13Co0.13Mn0.54O2 as cathode material for Li-ion batteries. J Solid State Electrochem 27, 171–182 (2023). https://doi.org/10.1007/s10008-022-05314-8
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DOI: https://doi.org/10.1007/s10008-022-05314-8