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  3. Unlocking Energy Potential: Exploiting Anionic Redox Activity In Na-based Layered Oxides.
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  3. Unlocking Energy Potential: Exploiting Anionic Redox Activity In Na-based Layered Oxides.

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Unlocking Energy Potential: Exploiting Anionic Redox Activity in Na-Based Layered Oxides.

Neeraja Nair1, Greeshma Caroline1, Rishikesh Vengarathody2

  • 1Amrita School of Nanosciences and Molecular Medicine, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India.

Small (Weinheim an Der Bergstrasse, Germany)
|March 27, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Sodium-ion batteries offer economic advantages but face energy density challenges. Exploiting anionic redox in layered oxides enhances capacity, but reversibility remains a key hurdle for practical energy storage.

Keywords:
anionic redoxcapacityenergy densitylayered oxidessodium‐ion batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sodium-ion batteries (SIBs) are emerging as a cost-effective alternative to lithium-ion batteries.
  • Current SIB limitations include lower energy density and suboptimal cycling, primarily due to cathode performance.
  • Anionic redox in layered oxides presents a novel strategy to boost SIB energy density.

Purpose of the Study:

  • To review anionic redox phenomena in sodium-based layered oxides.
  • To summarize strategies for enhancing anionic and cationic redox performance in cathode materials.
  • To elucidate structure-function-performance relationships in these materials.

Main Methods:

  • Comprehensive literature review of anionic redox in SIB cathodes.
  • Analysis of recent research on improving cathode insertion materials.
  • Examination of electrochemical performance and structural characteristics.

    • Main Results:

    • Anionic redox activity contributes significant extra capacity beyond theoretical limits.
    • Combined anionic and cationic redox processes enhance energy density.
    • Partial reversibility of anionic capacity during discharge is a major challenge.

    Conclusions:

    • Anionic redox is crucial for high-energy SIB cathodes.
    • Further research is needed to improve the reversibility of anionic redox.
    • Optimizing layered oxide structures is key for future energy storage applications.