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Structural, morphological, magnetic and electrochemical performance of Al–Cr co-doped cobalt ferrite for supercapacitor application.

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Title: Structural, morphological, magnetic and electrochemical performance of Al–Cr co-doped cobalt ferrite for supercapacitor application.
Authors: Mukhtar, G.1,2 (AUTHOR), Mohammed, J.3 (AUTHOR), Srivastava, A. K.1 (AUTHOR) srivastava_phy@yahoo.co.in
Source: Journal of Materials Science: Materials in Electronics. Apr2026, Vol. 37 Issue 10, p1-16. 16p.
Abstract: In the present investigation, Cobalt ferrite (CoCrxAlxFe2-2xO4, x = 0.0–0.12) has been synthesized using the sol–gel auto-combustion process. The synthesized samples were then characterized by X-ray diffraction (XRD), Fourier transform infra-red spectroscopy (FTIR), field emission scanning electron-microscopy (FESEM), and vibrating sample-magnetometry (VSM) to study their structural, vibrational, morphological, and magnetic properties. The electrochemical-performance was measured through cyclic-voltammetry (CV), galvanostatic charge discharge (GCD), and electrochemical impedance-spectroscopy (EIS) in a-three-electrode setup. XRD study shows the formation of single-phase spinel ferrite, while the FTIR analysis verified the characteristic tetrahedral and octahedral metal–oxygen vibrations. FESEM analysis shows the agglomeration of the particles with enhanced porosity at higher dopant concentrations. Magnetic analysis revealed that the nano-particle exhibit ferromagnetic behavior with gradual decrease in saturation magnetization because of the cation redistribution and A-B super exchange interactions weakening. The electrochemical study shows dominant pseudocapacitive behavior due to the reversible redox reactions between Co2 + /Co3 + and Fe2 + /Fe3 +. Specific capacitance of 1076.35 and 948.67 F/g were respectively observed from CV, and GCD results for x = 0.12. Al–Cr co-doped cobalt ferrite provides an effective way to develop an efficient electrode material for high-performance supercapacitors. [ABSTRACT FROM AUTHOR]
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Abstract:In the present investigation, Cobalt ferrite (CoCrxAlxFe2-2xO4, x = 0.0–0.12) has been synthesized using the sol–gel auto-combustion process. The synthesized samples were then characterized by X-ray diffraction (XRD), Fourier transform infra-red spectroscopy (FTIR), field emission scanning electron-microscopy (FESEM), and vibrating sample-magnetometry (VSM) to study their structural, vibrational, morphological, and magnetic properties. The electrochemical-performance was measured through cyclic-voltammetry (CV), galvanostatic charge discharge (GCD), and electrochemical impedance-spectroscopy (EIS) in a-three-electrode setup. XRD study shows the formation of single-phase spinel ferrite, while the FTIR analysis verified the characteristic tetrahedral and octahedral metal–oxygen vibrations. FESEM analysis shows the agglomeration of the particles with enhanced porosity at higher dopant concentrations. Magnetic analysis revealed that the nano-particle exhibit ferromagnetic behavior with gradual decrease in saturation magnetization because of the cation redistribution and A-B super exchange interactions weakening. The electrochemical study shows dominant pseudocapacitive behavior due to the reversible redox reactions between Co2 + /Co3 + and Fe2 + /Fe3 +. Specific capacitance of 1076.35 and 948.67 F/g were respectively observed from CV, and GCD results for x = 0.12. Al–Cr co-doped cobalt ferrite provides an effective way to develop an efficient electrode material for high-performance supercapacitors. [ABSTRACT FROM AUTHOR]
ISSN:09574522
DOI:10.1007/s10854-026-17156-5