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Related Experiment Video

Updated: May 13, 2026

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Stabilized O3-Type Layered Oxide Cathode via High-Entropy Engineering.

Huachao Yang1, Yuhang Li1, Shibo Jiang1

  • 1State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang, China.

Small Methods
|May 12, 2026
PubMed
Summary
This summary is machine-generated.

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High-entropy layered oxides enhance sodium-ion battery cathodes by stabilizing structure and improving ion diffusion. This research presents a novel high-entropy oxide (HEO) for robust, long-lasting sodium-ion battery performance.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • O3-type layered transition metal oxides are key cathode materials for sodium-ion batteries (SIBs) due to high sodium content and capacity.
  • These materials face challenges including irreversible phase transitions, slow sodium-ion diffusion, and lattice strain, limiting their practical application.
  • Developing stable and high-performance cathodes is crucial for advancing SIB technology.

Purpose of the Study:

  • To design and synthesize a high-entropy O3-type layered oxide cathode for improved sodium-ion battery performance.
  • To investigate the structural, electrochemical, and phase transition behaviors of the novel high-entropy oxide (HEO).
  • To demonstrate the efficacy of high-entropy engineering in enhancing cathode stability and rate capability.

Main Methods:

Keywords:
O3‐type layered oxidecycling stabilityhigh‐entropy engineeringphase transition reversibilitysodium‐ion batteries

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Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

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Last Updated: May 13, 2026

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
09:41

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Fabrication of Spatially Confined Complex Oxides
08:45

Fabrication of Spatially Confined Complex Oxides

Published on: July 1, 2013

  • Synthesis of a high-entropy oxide (HEO), NaNi0.24Fe0.24Mn0.24Li0.07Mg0.07Ti0.07Sb0.07O2, by incorporating redox-active and inactive dopants.
  • Electrochemical characterization including cycling stability, rate capability tests, and impedance spectroscopy.
  • In situ X-ray diffraction (XRD) to study phase transitions during cycling.

Main Results:

  • The HEO cathode exhibited single-phase formation, expanded interlayer spacing, a narrowed bandgap (0.63 eV), and reduced Na+ migration barriers compared to a benchmark material.
  • HEO demonstrated superior rate capability (63.57 mAh g-1 at 10 C) and exceptional cycling stability (80.71% retention after 300 cycles at 1 C; 80.09% after 1000 cycles at 5 C).
  • In situ XRD confirmed a reversible O3 ↔ P3 ↔ OP2 phase transition, suppressing the irreversible O'3 phase observed in the benchmark.

Conclusions:

  • High-entropy engineering effectively stabilizes the O3-type layered oxide structure, mitigating phase transitions and improving sodium-ion diffusion.
  • The synergistic multi-cation effects in HEO contribute to enhanced electrochemical performance and cycle life.
  • This work highlights high-entropy materials as a promising strategy for developing advanced, durable cathodes for sodium-ion batteries.