Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications
Magnetic nanoparticles of NiFe<sub>2</sub>O<sub>4</sub> were successfully prepared by utilizing the sol–gel techniques. The prepared samples were investigated through various techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), dielectric spectr...
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2023-06-01
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| author | Shalendra Kumar Faheem Ahmed Nagih M. Shaalan Nishat Arshi Saurabh Dalela Keun Hwa Chae |
| author_facet | Shalendra Kumar Faheem Ahmed Nagih M. Shaalan Nishat Arshi Saurabh Dalela Keun Hwa Chae |
| author_sort | Shalendra Kumar |
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| description | Magnetic nanoparticles of NiFe<sub>2</sub>O<sub>4</sub> were successfully prepared by utilizing the sol–gel techniques. The prepared samples were investigated through various techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), dielectric spectroscopy, DC magnetization and electrochemical measurements. XRD data analysed using Rietveld refinement procedure inferred that NiFe<sub>2</sub>O<sub>4</sub> nanoparticles displayed a single-phase nature with face-centred cubic crystallinity with space group Fd-3m. Average crystallite size estimated using the XRD patterns was observed to be ~10 nm. The ring pattern observed in the selected area electron diffraction pattern (SAED) also confirmed the single-phase formation in NiFe<sub>2</sub>O<sub>4</sub> nanoparticles. TEM micrographs confirmed the uniformly distributed nanoparticles with spherical shape and an average particle size of 9.7 nm. Raman spectroscopy showed characteristic bands corresponding to NiFe<sub>2</sub>O<sub>4</sub> with a shift of the A<sub>1g</sub> mode, which may be due to possible development of oxygen vacancies. Dielectric constant, measured at different temperatures, increased with temperature and decreased with increase in frequency at all temperatures. The Havrilliak–Negami model used to study the dielectric spectroscopy indicated that a NiFe<sub>2</sub>O<sub>4</sub> nanoparticles display non-Debye type relaxation. Jonscher’s power law was utilized for the calculation of the exponent and DC conductivity. The exponent values clearly demonstrated the non-ohmic behaviour of NiFe<sub>2</sub>O<sub>4</sub> nanoparticles. The dielectric constant of the nanoparticles was found to be >300, showing a normal dispersive behaviour. AC conductivity showed an increase with the rise in temperature with the highest value of 3.4 × 10<sup>−9</sup> S/cm at 323 K. The M-H curves revealed the ferromagnetic behaviour of a NiFe<sub>2</sub>O<sub>4</sub> nanoparticle. The ZFC and FC studies suggested a blocking temperature of ~64 K. The saturation of magnetization determined using the law of approach to saturation was ~61.4 emu/g at 10 K, corresponding to the magnetic anisotropy ~2.9 × 10<sup>4</sup> erg/cm<sup>3</sup>. Electrochemical studies showed that a specific capacitance of ~600 F g<sup>−1</sup> was observed from the cyclic voltammetry and galvanostatic charge–discharge, which suggested its utilization as a potential electrode for supercapacitor applications. |
| first_indexed | 2024-03-11T02:12:45Z |
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| issn | 1996-1944 |
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| spelling | doaj.art-bcd5db803e9f4aa19a8ea650925acfc12023-11-18T11:24:44ZengMDPI AGMaterials1996-19442023-06-011612432810.3390/ma16124328Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor ApplicationsShalendra Kumar0Faheem Ahmed1Nagih M. Shaalan2Nishat Arshi3Saurabh Dalela4Keun Hwa Chae5Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Basic Sciences, Preparatory Year Deanship, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Pure & Applied Physics, University of Kota, Kota, Rajasthan 324005, IndiaAdvanced Analysis & Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of KoreaMagnetic nanoparticles of NiFe<sub>2</sub>O<sub>4</sub> were successfully prepared by utilizing the sol–gel techniques. The prepared samples were investigated through various techniques such as X-ray diffraction (XRD), transmission electron microscopy (TEM), dielectric spectroscopy, DC magnetization and electrochemical measurements. XRD data analysed using Rietveld refinement procedure inferred that NiFe<sub>2</sub>O<sub>4</sub> nanoparticles displayed a single-phase nature with face-centred cubic crystallinity with space group Fd-3m. Average crystallite size estimated using the XRD patterns was observed to be ~10 nm. The ring pattern observed in the selected area electron diffraction pattern (SAED) also confirmed the single-phase formation in NiFe<sub>2</sub>O<sub>4</sub> nanoparticles. TEM micrographs confirmed the uniformly distributed nanoparticles with spherical shape and an average particle size of 9.7 nm. Raman spectroscopy showed characteristic bands corresponding to NiFe<sub>2</sub>O<sub>4</sub> with a shift of the A<sub>1g</sub> mode, which may be due to possible development of oxygen vacancies. Dielectric constant, measured at different temperatures, increased with temperature and decreased with increase in frequency at all temperatures. The Havrilliak–Negami model used to study the dielectric spectroscopy indicated that a NiFe<sub>2</sub>O<sub>4</sub> nanoparticles display non-Debye type relaxation. Jonscher’s power law was utilized for the calculation of the exponent and DC conductivity. The exponent values clearly demonstrated the non-ohmic behaviour of NiFe<sub>2</sub>O<sub>4</sub> nanoparticles. The dielectric constant of the nanoparticles was found to be >300, showing a normal dispersive behaviour. AC conductivity showed an increase with the rise in temperature with the highest value of 3.4 × 10<sup>−9</sup> S/cm at 323 K. The M-H curves revealed the ferromagnetic behaviour of a NiFe<sub>2</sub>O<sub>4</sub> nanoparticle. The ZFC and FC studies suggested a blocking temperature of ~64 K. The saturation of magnetization determined using the law of approach to saturation was ~61.4 emu/g at 10 K, corresponding to the magnetic anisotropy ~2.9 × 10<sup>4</sup> erg/cm<sup>3</sup>. Electrochemical studies showed that a specific capacitance of ~600 F g<sup>−1</sup> was observed from the cyclic voltammetry and galvanostatic charge–discharge, which suggested its utilization as a potential electrode for supercapacitor applications.https://www.mdpi.com/1996-1944/16/12/4328NiFe<sub>2</sub>O<sub>4</sub> nanoparticlesdielectricmodulusAC conductivityferromagnetismsupercapacitor |
| spellingShingle | Shalendra Kumar Faheem Ahmed Nagih M. Shaalan Nishat Arshi Saurabh Dalela Keun Hwa Chae Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications Materials NiFe<sub>2</sub>O<sub>4</sub> nanoparticles dielectric modulus AC conductivity ferromagnetism supercapacitor |
| title | Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications |
| title_full | Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications |
| title_fullStr | Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications |
| title_full_unstemmed | Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications |
| title_short | Investigations of Structural, Magnetic, and Electrochemical Properties of NiFe<sub>2</sub>O<sub>4</sub> Nanoparticles as Electrode Materials for Supercapacitor Applications |
| title_sort | investigations of structural magnetic and electrochemical properties of nife sub 2 sub o sub 4 sub nanoparticles as electrode materials for supercapacitor applications |
| topic | NiFe<sub>2</sub>O<sub>4</sub> nanoparticles dielectric modulus AC conductivity ferromagnetism supercapacitor |
| url | https://www.mdpi.com/1996-1944/16/12/4328 |
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