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Updated: Jun 17, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Rare-earth orthoferrites (RFeO3, R = La, Y) as next-generation electrode materials for high-performance
Arshad Iqbal1, Abdul Hakeem Anwer2, Abdelbaki Benamor2,3
1Department of Physics, Integral University, Lucknow, 226026, India. tahira@iul.ac.in.
Abstract:
This study addresses the synthesis and electrochemical assessment of nanocrystalline orthoferrites (RFeO3, R = La and Y) synthesized via a sol-gel auto-combustion method. The synthesized orthoferrites were systematically characterized for their structural, morphological, and electrochemical properties. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed that both samples crystallized in a single-phase orthorhombic perovskite structure, with nanoscale domains. Upon their assessment as supercapacitor electrode materials, LaFeO3 exhibited a remarkably high specific capacitance of 815.6 F g-1 at 1.0 A g-1, which is nearly twice that of YFeO3. Furthermore, LaFeO3 retained 88-90% of its initial capacitance after 10 000 galvanostatic charge-discharge cycles, demonstrating its exceptional cycling resilience. The superior electrochemical performance of LaFeO3 is attributed to its electronic structure and optimized morphology and surface area, which facilitate effective ion diffusion and reversible redox reactions of Fe2+/Fe3+ at the electrode-electrolyte interface. These characteristics lead to enhanced charge storage kinetics and structural robustness during repeated cycling. This excellent electrochemical performance, combined with a cost-effective and scalable synthesis, demonstrated LaFeO3 to be a promising electrode material for next-generation high-performance supercapacitor applications.
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