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<p>Manganese dioxides (MnO<sub>2</sub>) are promising anode materials due to their high theoretical capacity. However, pure MnO<sub>2</sub> anodes suffer from rapid capacity fading, which is mainly caused by the poor electrical conductivity and structural collapse during electrochemical cycling. Herein, carbon spheres are prepared as a matrix to load MnO<sub>2</sub>. On the one hand, the presence of the carbon sphere matrix could improve the electrical conductivity. On the other hand, the carbon sphere could inhibit the volume change to maintain the structural stability of MnO<sub>2</sub>. As a result, the as-prepared hierarchical C/MnO<sub>2</sub> spheres exhibit high specific capacity and superior cycle stability. This work provides a strategy for designing hybrid anodes for high-performance lithium-ion batteries.</p>

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Hierarchical C/MnO2 spheres as anode materials for high-performance lithium-ion batteries

  • 期刊论文

  • 发表日期：

    2025年7月11日

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  • Juanjuan Wang,
  • Jiangping Nan,
  • Xin’e Yan,
  • Zhanhao Zhang

摘要

Manganese dioxides (MnO2) are promising anode materials due to their high theoretical capacity. However, pure MnO2 anodes suffer from rapid capacity fading, which is mainly caused by the poor electrical conductivity and structural collapse during electrochemical cycling. Herein, carbon spheres are prepared as a matrix to load MnO2. On the one hand, the presence of the carbon sphere matrix could improve the electrical conductivity. On the other hand, the carbon sphere could inhibit the volume change to maintain the structural stability of MnO2. As a result, the as-prepared hierarchical C/MnO2 spheres exhibit high specific capacity and superior cycle stability. This work provides a strategy for designing hybrid anodes for high-performance lithium-ion batteries.