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<p>A simple and scalable synthesis route for LiFe<sub>0.67</sub>Mn<sub>0.33</sub>PO<sub>4</sub>/C cathode material using spray drying combined with high-temperature solid phase technology was developed. With Li<sub>3</sub>PO<sub>4</sub> as the lithium source and cost-effective Mn<sub>3</sub>O<sub>4</sub> replacing part of the iron, this process is compatible with the industrial production line of LiFePO<sub>4</sub>. X-ray diffraction (XRD) confirmed that the synthesized material exhibited a single-phase olivine structure with a space group of Pnma. Scanning electron microscopy (SEM) revealed a spherical morphology. The synthesized material exhibits excellent rate and cycling performance under the low-grain micro-strain and conductive carbon network structure. Electrochemical testing demonstrated initial discharge capacities of 164, 163, 160, 157, 150, and 128 mAh g<sup>−1</sup> at rates of 0.1, 0.2, 0.5, 1, 2, and 5 C, respectively. Moreover, 96.16% of the capacity is retained after 200 cycles at 1C. This approach offers a viable pathway for the preparation of LiFe<sub>1-x</sub>Mn<sub>x</sub>PO<sub>4</sub>/C positive electrode materials with high energy density and high rate performance.</p>

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A simple spray drying-assisted solid-state synthesis of LiFe0.67Mn0.33PO4/C cathode material for lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Zijun Fang,
  • Junjie Fang,
  • Guorong Hu,
  • Yanbing Cao,
  • Huan Li,
  • Quanjun Fu,
  • Ke Bai,
  • Zhongdong Peng,
  • Ke Du

摘要

A simple and scalable synthesis route for LiFe0.67Mn0.33PO4/C cathode material using spray drying combined with high-temperature solid phase technology was developed. With Li3PO4 as the lithium source and cost-effective Mn3O4 replacing part of the iron, this process is compatible with the industrial production line of LiFePO4. X-ray diffraction (XRD) confirmed that the synthesized material exhibited a single-phase olivine structure with a space group of Pnma. Scanning electron microscopy (SEM) revealed a spherical morphology. The synthesized material exhibits excellent rate and cycling performance under the low-grain micro-strain and conductive carbon network structure. Electrochemical testing demonstrated initial discharge capacities of 164, 163, 160, 157, 150, and 128 mAh g−1 at rates of 0.1, 0.2, 0.5, 1, 2, and 5 C, respectively. Moreover, 96.16% of the capacity is retained after 200 cycles at 1C. This approach offers a viable pathway for the preparation of LiFe1-xMnxPO4/C positive electrode materials with high energy density and high rate performance.