Abstract
This article describes the synthesis of CoFe2O4 nanoparticles, which can be used to form an anode for supercapacitor applications. The CoFe2O4 nanoparticles were synthesized via a hydrothermal route. The structural parameters of the prepared samples were characterized by x-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM), and the supercapacitive behavior was evaluated by cyclic voltammetry plots, galvanostatic charge–discharge plots, and electrochemical impedance spectroscopy (EIS). Rietveld refinement confirmed the spinel structure of the CoFe2O4 nanoparticles with space group Fd3m. The FE-SEM micrographs confirmed the spherical shape of the CoFe2O4 nanoparticles, with a mean particle size of 58 nm. The electrochemical performance of the samples was checked in different aqueous electrolytes: Na2SO4 and KOH. The nanoparticles exhibited differences in capacitive behavior in different aqueous electrolytes, with higher specific capacitance (362 F/g) in the KOH electrolyte due to its greater molar ionic conductivity in comparison to the Na2SO4, and a low resistance value obtained from impedance measurements was observed for CoFe2O4 nanoparticles. The cyclic stability of CoFe2O4 in KOH electrolyte, with 82.16% retention after 2000 cycles at current density of 1 A/g, evidenced its outstanding performance, with exceptionally high specific capacitance of 314 F/g.
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Acknowledgments
This work was supported by the Deanship of Scientific Research, Vice Presidency for Graduate Studies and Scientific Research, King Faisal University, Saudi Arabia [Grant No. 5473]. The authors P. A. Alvi and Ravina acknowledge the Department of Science and Technology (DST), Government of India, for awarding the CURIE project to Banasthali Vidyapith, Rajasthan. P. A. Alvi appreciates the DST, Government of India, for granting the STUTI project to Banasthali Vidyapith.
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Kumar, S., Alshoaibi, A., Ravina et al. Synergistic Effect of Electrolytes on the Electrochemical Performance of CoFe2O4 Nanoparticles as Anode Materials for Supercapacitor Applications. J. Electron. Mater. (2024). https://doi.org/10.1007/s11664-024-11059-z
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DOI: https://doi.org/10.1007/s11664-024-11059-z