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Electrochemical Properties of Mn-Doped Nanosphere LiFePO4

  • Nanomaterials and Composites for Energy Conversion and Storage
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Abstract

LiFePO4 with an olivine structure has attracted extensive interest as a cathode material for rechargeable lithium batteries. However, due to the inherent low ionic and low conductivity of LiFePO4, its electrochemical performance still has a lot of room for improvement. LiMnxFe1−xPO4 (x = 0, 0.10, 0.18, 0.50) materials with different Mn doping amounts were synthesized by a solvothermal method. The experimental results show that the initial discharge specific capacities of LiMn0.1Fe0.9PO4 at 0.1 C and 0.5 C are 142.8 mAh g−1 and 123.4 mAh g−1, respectively. The synthesized olivine LiMn0.1Fe0.9PO4/C composite has better electrochemical properties. The initial discharge capacity of the composite reaches 151.9 mAh g−1 at 0.1 C rate and 105.1 mAh g−1 at 2 C rate. The improvement of electrochemical performance is attributed to the columnar effect of the Mn-stabilized crystal structure and the lithium-ion diffusion rate caused by Mn doping.

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Acknowledgements

This work was funded by Natural Science Foundation of Hunan Province (Project No.: 2019JJ70050) and Scientific Research Project of colleges and universities in Hunan Province (Project No.: 19C0557).

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Authors and Affiliations

  1. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou, Hunan, People’s Republic of China

    X. Nie

  2. School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China

    J. Xiong

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Nie, X., Xiong, J. Electrochemical Properties of Mn-Doped Nanosphere LiFePO4. JOM 73, 2525–2530 (2021). https://doi.org/10.1007/s11837-021-04753-4

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