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<p>Spinel LiMn<sub>2</sub>O<sub>4</sub> has emerged as a highly promising cathode material for large-scale applications in lithium-ion batteries. The physicochemical properties of LiMn<sub>2</sub>O<sub>4</sub>, particularly particle size, specific surface area and crystallinity, play crucial roles in determining electrode kinetics and electrochemical performance. In this study, spherical Mn<sub>3</sub>O<sub>4</sub> particles with controlled sizes were synthesized through a metallic manganese corrosion-oxidation method, which subsequently served as manganese precursors for preparing LiMn<sub>2</sub>O<sub>4</sub> with different particle sizes. The effects of particle size on the structural characteristics and electrochemical properties of LiMn<sub>2</sub>O<sub>4</sub> were systematically investigated. The results demonstrate that the spherical LiMn<sub>2</sub>O<sub>4</sub> synthesized from smaller Mn<sub>3</sub>O<sub>4</sub> particles (median particle size D<sub>50</sub> = 3.33&#xa0;μm) exhibits enhanced structural stability, reduced electrochemical impedance, and improved lithium-ion diffusion coefficient, leading to remarkable improvement in lithium storage properties. Specifically, this optimized material delivers specific discharge capacities of 126.51 mAh/g at 1 C and 105.01 mAh/g at 10 C under 25&#xa0;°C. Moreover, it exhibits a capacity retention rate of 83.76% after 400 cycles at 1 C and 25&#xa0;°C, indicating stable long-term performance. These findings reveal that the particle size of Mn<sub>3</sub>O<sub>4</sub> significantly influences the structural and electrochemical properties of LiMn<sub>2</sub>O<sub>4</sub>, providing valuable guidance and practical pathways for synthesizing high-performance lithium manganese oxide cathode materials.</p>

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Effect of Mn3O4 particle size on synthesis and electrochemical performance of spinel LiMn2O4 cathode

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Yicun Wang,
  • Zhipeng Wang,
  • Zenghui Li,
  • Xuanning Huang,
  • Yang Yang,
  • Jin Yu,
  • Xiaodong Pei,
  • Dongming Liu

摘要

Spinel LiMn2O4 has emerged as a highly promising cathode material for large-scale applications in lithium-ion batteries. The physicochemical properties of LiMn2O4, particularly particle size, specific surface area and crystallinity, play crucial roles in determining electrode kinetics and electrochemical performance. In this study, spherical Mn3O4 particles with controlled sizes were synthesized through a metallic manganese corrosion-oxidation method, which subsequently served as manganese precursors for preparing LiMn2O4 with different particle sizes. The effects of particle size on the structural characteristics and electrochemical properties of LiMn2O4 were systematically investigated. The results demonstrate that the spherical LiMn2O4 synthesized from smaller Mn3O4 particles (median particle size D50 = 3.33 μm) exhibits enhanced structural stability, reduced electrochemical impedance, and improved lithium-ion diffusion coefficient, leading to remarkable improvement in lithium storage properties. Specifically, this optimized material delivers specific discharge capacities of 126.51 mAh/g at 1 C and 105.01 mAh/g at 10 C under 25 °C. Moreover, it exhibits a capacity retention rate of 83.76% after 400 cycles at 1 C and 25 °C, indicating stable long-term performance. These findings reveal that the particle size of Mn3O4 significantly influences the structural and electrochemical properties of LiMn2O4, providing valuable guidance and practical pathways for synthesizing high-performance lithium manganese oxide cathode materials.