铜锂共掺杂Mn3O4正极材料在水系锌离子电池中的应用

Manganese oxides have emerged as promising cathode materials for aqueous zinc-ion batteries (ZIBs) owing to their low cost, high safety, and environmental benignity. However, the practical application is hindered by poor cycling stability and low electronic conductivity. This study proposes a Cu-Li co-doping strategy to enhance Mn 3 O 4 ’s electrochemical performance, producing the co-doped material (CLMO) using a facile one-step solution combustion method. Experimental results revealed Cu 2+ substitution at Mn 2+ sites triggered lattice contraction, shortening Zn 2+ diffusion pathways, while Li + enhanced cycling stability by suppressing Mn dissolution and stabilizing the lattice. Synergistic co-doping significantly increased oxygen vacancy concentration, improving electronic conductivity. The CLMO cathode exhibited a remarkable capacity of 270 mAh g −1 at 0.1 A g −1 and retained 98% capacity after 800 cycles at 0.5 A g −1 , outperforming single-doped and undoped counterparts. EIS analysis further validated the reduced charge transfer resistance (13.17 Ω vs. 75.59 Ω) and accelerated Zn 2+ diffusion kinetics. These findings elucidate the synergistic mechanisms of bimetallic co-doping and offer a theoretical and technical foundation for developing high-stability ZIBs cathodes.