(FeNiMnMgCuCo)3O4 High-Entropy Cathode for Zinc-Ion Batteries

As a result of the high safety, low cost, and environmental benignity, aqueous zinc-ion batteries are regarded as one of the most promising candidates for next-generation large-scale energy storage systems. However, their further development is constrained by performance bottlenecks in existing cathode materials, including capacity, cycle life, and reaction kinetics. In this study, a high-entropy design strategy is employed to synthesize the metal oxide (FeNiMnMgCuCo)3O4 with a cubic spinel structure, and its electrochemical performance as a cathode for zinc-ion batteries is systematically evaluated. The prepared (FeNiMnMgCuCo)3O4 high-entropy cathode exhibits high reversible capacity (341.3 mA h g−1 at 0.1 A g−1) and remarkable long-term cycling stability (76.1% retention after 1000 cycles at 3 A g−1). This work not only demonstrates a high-entropy cathode material with practical potential but also provides new research insights for optimizing zinc-ion storage performance through composition design and entropy regulation.