Ions doping engineering is considered an effective strategy to modulate the catalytic activity of multi-metallic oxides as efficient oxygen electrodes for lithium‑oxygen (LiO₂) batteries. In this article, amorphous tetra-metallic (Fe-Co-Ni-Mn) oxides modulated by varying manganese content were synthesized by co-precipitation followed by calcination, which could offer large quantities of catalytically active sites and good synergistic effect between the redox pairs. Notably, the amorphous structure with a higher specific surface area leads to the exposure of a large amount of active sites. Benefiting from the above advantages, the LiO₂ batteries deliver a low voltage gap of 0.84 V, a considerable initial specific capacity of 13,675 mAh g⁻¹ at the current density of 100 mA g⁻¹, and superior long-term cycling for 910 h without significant voltage attenuation. Our work provides new insight into a facile and promising approach to the fabrication of highly active catalytic oxygen cathode and demonstrates that the synergistic interaction between the abundant valence-changeable metals cations in designing tetra-metallic oxides is a valuable strategy to achieve high-efficiency electrocatalyst for LiO₂ batteries.

离子掺杂工程被认为是调节多金属氧化物催化活性的有效策略，作为锂氧 (Li O ₂ ) 电池的高效氧电极。在这篇文章中，通过共沉淀然后煅烧合成了由不同锰含量调制的非晶四金属（Fe-Co-Ni-Mn）氧化物，它可以提供大量的催化活性位点和氧化还原对之间的良好协同效应. 值得注意的是，具有较高比表面积的无定形结构导致大量活性位点暴露。受益于上述优势，Li O _{2电池可提供 0.84 V 的低电压间隙，以及 13,675 mAh g} ⁻¹的相当大的初始比容量在 100 mA g ⁻¹的电流密度下，以及 910 小时的出色长期循环而没有明显的电压衰减。我们的工作为制造高活性催化氧阴极的简便且有前途的方法提供了新的见解，并证明在设计四金属氧化物时丰富的变价金属阳离子之间的协同相互作用是实现高效电催化剂的有价值的策略对于 Li O ₂电池。