Perovskite oxides have introduced a new advancement in the field of energy storage technologies. Because of their outstanding properties, perovskite oxides are a diverse and exciting class of compounds that have attracted a lot of interest. Perovskite oxides have attracted considerable interest as potential electrode materials for supercapacitors due to their unique structure, compositional flexibility, and intrinsic oxygen vacancy. Synthesized single-phase perovskite LaFeO3 and its 2D equivalent Ruddlesden-Popper oxide La2FeO4 were obtained via a solid-state reaction method. X-ray diffraction and field emission scanning electron microscopy have been used to study the crystal structure and surface morphology of the produced materials, respectively. The optical band gap for LaFeO3 is 2.10 eV, while for La2FeO4, it is 2.04 eV, as determined by UV-vis measurements. Electrochemical impedance spectroscopy (EIS), charge/discharge analysis, and cyclic voltammetry have all been used to study the electrochemical characteristics. Both of the samples exhibited typical pseudocapacitor behavior, as indicated by the presence of a redox peak in cyclic voltammetry, which was recorded in the potential window of 0 to -1 V. For both compounds, the faradic charge transfer resistance (Rct) was determined to be close to ~ 1 Ω. After 100 cycles of testing the charge/discharge characteristic, the specific capacitance of LaFeO3 and La2FeO4 in a 3M KOH electrolyte solution stabilized at around 6 Fg-1 and 10 Fg-1, respectively.
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Study of structure and electrochemical properties of LaFeO3 and La2FeO4 as electrode materials for super-capacitor application
Published:
28 May 2024
by MDPI
in The 3rd International Electronic Conference on Processes
session Energy Systems
Abstract:
Keywords: Perovskite oxide, Ruddlesden-Popper oxide, LaFeO3, La2FeO4, Electrode, Supercapacitor
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