Structure-tuned Pr-doped NiFe2O4nanoceramics for enhanced pseudocapacitive performance: Insights from lattice distortion and charge transfer dynamics
Electrochemical performance; Nanoparticles synthesis; Praseodymium-doped nickel ferrite; Supercapacitors
In this study, Praseodymium-doped nickel ferrite (NiPrxFe2-xO4, x=0.000.02) nanoceramics were synthesized via an efficient solution combustion method to investigate the structural modifications and their impact on electrochemical performance. X-ray diffraction confirmed the formation of a single-phase cubic spinel structure across all compositions, with Pr3+substitution inducing measurable lattice distortions and variations in crystallite size. WilliamsonHall analysis revealed a doping-dependent microstrain, highlighting the role of Pr doping in tuning the structural framework. FTIR spectra further confirmed alterations in metaloxygen vibrations at tetrahedral and octahedral sites, supporting the lattice perturbations caused by ionic substitution. Electrochemical characterization using cyclic voltammetry, galvanostatic chargedischarge, and electrochemical impedance spectroscopy demonstrated superior pseudocapacitive behavior for the optimally doped sample (x=0.01), which exhibited a high specific capacitance of 69.2F/g and the lowest charge transfer resistance (0.30?). Scanning electron microscopy revealed a porous and roughened surface morphology in this composition, facilitating rapid ion diffusion and redox kinetics. This is quantitatively supported by a correlation between doping-induced lattice strain, crystallite size, and the resulting enhancement in charge transfer kinetics and redox-active site density. These findings position Pr-doped NiFe2O4nanoceramics as promising candidates for next-generation supercapacitor electrodes. 2025 Elsevier Ltd and Techna Group S.r.l. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Kari, Koustubh V.; Soman, Gowri; Jagadeesha Angadi, V.; Hegde, Gurumurthy; Basavegowda, Nagaraj; Ganesh, V.; Algarni, H.
Ceramics International;Volume;51;pp.53894-53903
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https://doi.org/10.1016/j.ceramint.2025.09.132 https://www.scopus.com/pages/publications/105017895926?origin=resultslist
Kari K.V., Department of PG Studies in Chemistry, KLE's P C Jabin Science College, Hubli, 31, India; Soman G., Department of Chemistry, Christ University, Hosur Road, Bangalore, 560029, India; Jagadeesha Angadi V., Department of Physics K.L.E's P.C.Jabin Science College, Karnataka, Hubli, 31, India; Hegde G., Department of Chemistry, Christ University, Hosur Road, Bangalore, 560029, India, Centre for Advanced Research and Development (CARD), Christ University, Hosur Road, Bangalore, 560029, India; Basavegowda N., Department of Biotechnology, Yeungnam University, Gyeongbuk, Gyeongsan, 38541, South Korea; Ganesh V., Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia, Central Labs, King Khalid University, P.O. Box 960, AlQura'a, Abha, Saudi Arabia; Algarni H., Laboratory of Nano-Smart Materials for Science and Technology (LNSMST), Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia