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Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Published on: November 11, 2013

Exploring Antiperovskite Cathodes for Na-Ion Batteries.

Tian Dai1, Razan M N Ahmed1, Eira Tiberg North1

  • 1Centre for Material Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo, Norway.

Chemsuschem
|May 19, 2026
PubMed
Summary

Antiperovskite (AP) cathode materials show promise for sodium-ion batteries (SIBs). This study explored Li2FeSeO as an AP cathode for SIBs, revealing a dual redox mechanism involving iron and selenium.

Keywords:
Na‐ion batteriesX‐ray absorption spectroscopyX‐ray diffractionantiperovskite cathodesoperando characterization

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Antiperovskite (AP) cathode materials have shown potential in lithium-ion batteries.
  • Their application in other battery chemistries, such as sodium-ion batteries (SIBs), remains underexplored.

Purpose of the Study:

  • To investigate the feasibility of using an AP-based cathode material, Li2FeSeO, for SIB applications.
  • To understand the electrochemical performance and working mechanism of this novel SIB cathode.

Main Methods:

  • Electrochemical characterization including galvanostatic cycling.
  • Synchrotron operando and ex situ X-ray studies to probe the working mechanism.

Main Results:

  • The Na-based AP cathode exhibited reversible cycling with an initial capacity of 129 mAh g⁻¹ and 57% retention after 200 cycles at 10 mA g⁻¹.
  • Up to 0.75 Na⁺ ions could be reversibly inserted into the AP framework.
  • Operando and ex situ X-ray studies indicated a dual redox mechanism involving Fe and Se, with Se as the primary redox-active element.

Conclusions:

  • Antiperovskite cathodes are viable candidates for sodium-ion batteries.
  • The observed capacity limitations may stem from kinetic constraints on Na⁺ diffusion, leading to core-shell structure formation.
  • Mechanistic insights gained can guide future structural optimization of AP cathodes for enhanced SIB performance.