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Updated: May 21, 2026
10:03
Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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
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.
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.
