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<p>We proposed a strategy to address the issue by synthesizing MnO with half-filled 3 d electron orbitals. That is, MnO nanocubes with an edge length of 61.82 nm were successfully prepared through electros-pinning and one-step pyrolysis as the cathode electrode for Li-O<sub>2</sub> batteries. It is observed that the intermediate LiMnO<sub>4</sub> rather than Li<sub>2</sub>O<sub>2</sub> is formed when LiO<sub>2</sub> interactes with MnO (111) during the discharge process. It is precisely because of LiMnO<sub>4</sub> that reduces its charge overpotential to 0.29 V. The novel reaction mechanism dominated by LiMnO<sub>4</sub> further facilitates the lower charge overpotential, thereby enhancing the energy efficiency of the batteries.</p>

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MnO Nanocubes Enabling Charging Potential of Li-O2 Batteries to 3.25 V in a LiMnO4-dominated Novel Reaction Mechanism

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Zhuxin Li,
  • Xufeng Li,
  • Qingzhu Shu,
  • Kai Ma,
  • Hongquan Yu,
  • Yong Zhang,
  • Shuhong Liu,
  • Hong Zhao

摘要

We proposed a strategy to address the issue by synthesizing MnO with half-filled 3 d electron orbitals. That is, MnO nanocubes with an edge length of 61.82 nm were successfully prepared through electros-pinning and one-step pyrolysis as the cathode electrode for Li-O2 batteries. It is observed that the intermediate LiMnO4 rather than Li2O2 is formed when LiO2 interactes with MnO (111) during the discharge process. It is precisely because of LiMnO4 that reduces its charge overpotential to 0.29 V. The novel reaction mechanism dominated by LiMnO4 further facilitates the lower charge overpotential, thereby enhancing the energy efficiency of the batteries.