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<p>The synthesis of porous spherical Mn<sub>2</sub>O<sub>3</sub> using spray pyrolysis is reported. Subsequently, an energy-efficient microwave heating method is used to obtain <i>o</i>-LiMnO<sub>2</sub> with good electrochemical properties from this precursor. The mechanism of product formation is discussed in detail. The results show that the flow rate of the carrier gas can directly affect the particle size and morphology of the Mn<sub>2</sub>O<sub>3</sub> precursors. The optimized carrier gas flow rate for preparing the Mn<sub>2</sub>O<sub>3</sub> precursor is 4&#xa0;L/min. The <i>o</i>-LiMnO<sub>2</sub> prepared under optimized microwave heating conditions has an initial charge capacity of 238.9 mAh g<sup>− 1</sup> and an irreversible capacity loss of 145.1 mAh g<sup>− 1</sup> at 0.1&#xa0;C within 3–4.5&#xa0;V. Compared with <i>o</i>-LiMnO<sub>2</sub> synthesized by high-temperature solid-phase reaction or hydrothermal methods, <i>o</i>-LiMnO<sub>2</sub> synthesized by the spray pyrolysis-microwave heating process has the advantage of fast synthesis and energy saving, and it can effectively maintain the morphology of the Mn<sub>2</sub>O<sub>3</sub> precursor. The electrochemical performance and irreversible lithium capacity were improved, indicating its potential application in the field of pre-lithiation additives.</p>

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Spray pyrolysis-microwave heating for rapid synthesis of o-LiMnO2 as a pre-lithiation agent

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Lizhi Cui,
  • Die Zhang,
  • Lei Xu,
  • Zhixing Wang,
  • Wenjie Peng,
  • Jiexi Wang,
  • Guochun Yan,
  • Hui Duan,
  • Guangchao Li,
  • Huajun Guo

摘要

The synthesis of porous spherical Mn2O3 using spray pyrolysis is reported. Subsequently, an energy-efficient microwave heating method is used to obtain o-LiMnO2 with good electrochemical properties from this precursor. The mechanism of product formation is discussed in detail. The results show that the flow rate of the carrier gas can directly affect the particle size and morphology of the Mn2O3 precursors. The optimized carrier gas flow rate for preparing the Mn2O3 precursor is 4 L/min. The o-LiMnO2 prepared under optimized microwave heating conditions has an initial charge capacity of 238.9 mAh g− 1 and an irreversible capacity loss of 145.1 mAh g− 1 at 0.1 C within 3–4.5 V. Compared with o-LiMnO2 synthesized by high-temperature solid-phase reaction or hydrothermal methods, o-LiMnO2 synthesized by the spray pyrolysis-microwave heating process has the advantage of fast synthesis and energy saving, and it can effectively maintain the morphology of the Mn2O3 precursor. The electrochemical performance and irreversible lithium capacity were improved, indicating its potential application in the field of pre-lithiation additives.