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

Ningning Dong1, Huanhuan Cui1, Yuncheng Cai1

  • 1Analytical & Testing Center, Huazhong University of Science and Technology, Wuhan 430074, China.

Materials (Basel, Switzerland)
|May 4, 2026
PubMed
Summary

High-entropy metal oxides offer a promising solution for aqueous zinc-ion batteries. This study demonstrates a novel (FeNiMnMgCuCo)3O4 cathode with high capacity and excellent cycling stability for energy storage.

Keywords:
aqueous zinc-ion batterycathodeelectrochemical performancehigh-entropy oxides

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Aqueous zinc-ion batteries (AZIBs) are attractive for large-scale energy storage due to safety, cost, and environmental benefits.
  • Current AZIB development is limited by cathode material performance, specifically capacity, cycle life, and reaction kinetics.
  • Novel cathode materials are crucial for advancing AZIB technology.

Purpose of the Study:

  • To explore the potential of high-entropy materials as cathode components for AZIBs.
  • To synthesize and electrochemically evaluate a novel high-entropy metal oxide, (FeNiMnMgCuCo)3O4, with a cubic spinel structure.
  • To investigate the impact of high-entropy design on the electrochemical performance of zinc-ion battery cathodes.

Main Methods:

  • Synthesis of a high-entropy metal oxide (FeNiMnMgCuCo)3O4 using a high-entropy design strategy.
  • Characterization of the synthesized material's cubic spinel structure.
  • Systematic electrochemical evaluation of the material as a cathode in aqueous zinc-ion batteries.

Main Results:

  • The synthesized (FeNiMnMgCuCo)3O4 high-entropy cathode demonstrated a high reversible capacity of 341.3 mA h g-1 at 0.1 A g-1.
  • Remarkable long-term cycling stability was achieved, with 76.1% capacity retention after 1000 cycles at 3 A g-1.
  • The material exhibits practical potential for high-performance zinc-ion energy storage.

Conclusions:

  • High-entropy design is an effective strategy for developing advanced cathode materials for aqueous zinc-ion batteries.
  • The (FeNiMnMgCuCo)3O4 high-entropy cathode shows significant promise for next-generation energy storage applications.
  • This research offers new insights into composition design and entropy regulation for optimizing zinc-ion storage.