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Updated: Jan 24, 2026
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Coulombic self-ordering upon charging a large-capacity layered cathode material for rechargeable batteries
Benoit Mortemard de Boisse1, Marine Reynaud2, Jiangtao Ma1
1Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan.
Nature Communications
|May 18, 2019
Summary
This study reveals self-repairing stacking faults in sodium-rich layered oxides during desodiation. This phenomenon enhances reversibility for next-generation high-energy-density batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Lithium- and sodium-rich layered transition-metal oxides offer high capacity via oxygen-redox reactions.
- Structural degradation like cation migration and exfoliation hinders their use in high-energy-density batteries.
Purpose of the Study:
- To investigate the self-repairing phenomenon of stacking faults in oxygen-redox layered oxides.
- To understand the mechanisms behind improved reversibility in these battery materials.
Main Methods:
- Demonstration of self-repairing stacking faults in Na2RuO3 upon desodiation.
- Analysis of phase transformations driven by alkali-metal vacancies during charging.
Main Results:
- Observed self-repairing of stacking faults and progressive ordering upon charging in Na2RuO3.
- Identified 3D Coulombic attractive interactions driven by ordered alkali-metal vacancies.
Conclusions:
- Ordered alkali-metal vacancies are crucial for stabilizing phase transformations and enabling reversible oxygen-redox reactions.
- The self-repairing mechanism enhances electrode reaction reversibility in layered transition-metal oxides.
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