Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration
Energy storage applications received great attention due to environmental aspects. A green method was used to prepare a composite of nickel–iron-based spinel oxide nanoparticle@CNT. The prepared materials were characterized by different analytical methods like X-ray diffraction, X-ray photon spectro...
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| Format: | Article |
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MDPI AG
2023-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/19/2643 |
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| author | Ali H. Bashal Mahmoud A. Hefnawy Hoda A. Ahmed Mohamed A. El-Atawy Rami Adel Pashameah Shymaa S. Medany |
| author_facet | Ali H. Bashal Mahmoud A. Hefnawy Hoda A. Ahmed Mohamed A. El-Atawy Rami Adel Pashameah Shymaa S. Medany |
| author_sort | Ali H. Bashal |
| collection | DOAJ |
| description | Energy storage applications received great attention due to environmental aspects. A green method was used to prepare a composite of nickel–iron-based spinel oxide nanoparticle@CNT. The prepared materials were characterized by different analytical methods like X-ray diffraction, X-ray photon spectroscopy (XPS), scanning electron microscopy (SEM), and transmitted electron microscopy (TEM). The synergistic effect between nickel–iron oxide and carbon nanotubes was characterized using different electrochemical methods like cyclic voltammetry (CV), galvanostatic charging/discharging (GCD), and electrochemical impedance spectroscopy (EIS). The capacitances of the pristine NiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub>@CNT were studied in different electrolyte concentrations. The effect of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mrow><mi mathvariant="normal">O</mi><mi mathvariant="normal">H</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></semantics></math></inline-formula> concentrations was studied for modified and non-modified surfaces. Furthermore, the specific capacitance was estimated for pristine and modified NiFe<sub>2</sub>O<sub>4</sub> at a wide current range (5 to 17 A g<sup>−1</sup>). Thus, the durability of different surfaces after 2000 cycles was studied, and the capacitance retention was estimated as 78.8 and 90.1% for pristine and modified NiFe<sub>2</sub>O<sub>4</sub>. On the other hand, the capacitance rate capability was observed as 65.1% (5 to 17 A g<sup>−1</sup>) and 62.4% (5 to 17 A g<sup>−1</sup>) for NiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub>@CNT electrodes. |
| first_indexed | 2024-03-10T21:38:56Z |
| format | Article |
| id | doaj.art-a3870ff748f8455d985b5de4c6efb7c5 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T21:38:56Z |
| publishDate | 2023-09-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a3870ff748f8455d985b5de4c6efb7c52023-11-19T14:48:49ZengMDPI AGNanomaterials2079-49912023-09-011319264310.3390/nano13192643Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte ConcentrationAli H. Bashal0Mahmoud A. Hefnawy1Hoda A. Ahmed2Mohamed A. El-Atawy3Rami Adel Pashameah4Shymaa S. Medany5Chemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi ArabiaChemistry Department, Faculty of Science, Cairo University, Giza 12613, EgyptChemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi ArabiaChemistry Department, Faculty of Science at Yanbu, Taibah University, Yanbu 46423, Saudi ArabiaDepartment of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah 24230, Saudi ArabiaChemistry Department, Faculty of Science, Cairo University, Giza 12613, EgyptEnergy storage applications received great attention due to environmental aspects. A green method was used to prepare a composite of nickel–iron-based spinel oxide nanoparticle@CNT. The prepared materials were characterized by different analytical methods like X-ray diffraction, X-ray photon spectroscopy (XPS), scanning electron microscopy (SEM), and transmitted electron microscopy (TEM). The synergistic effect between nickel–iron oxide and carbon nanotubes was characterized using different electrochemical methods like cyclic voltammetry (CV), galvanostatic charging/discharging (GCD), and electrochemical impedance spectroscopy (EIS). The capacitances of the pristine NiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub>@CNT were studied in different electrolyte concentrations. The effect of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mrow><mi mathvariant="normal">O</mi><mi mathvariant="normal">H</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></semantics></math></inline-formula> concentrations was studied for modified and non-modified surfaces. Furthermore, the specific capacitance was estimated for pristine and modified NiFe<sub>2</sub>O<sub>4</sub> at a wide current range (5 to 17 A g<sup>−1</sup>). Thus, the durability of different surfaces after 2000 cycles was studied, and the capacitance retention was estimated as 78.8 and 90.1% for pristine and modified NiFe<sub>2</sub>O<sub>4</sub>. On the other hand, the capacitance rate capability was observed as 65.1% (5 to 17 A g<sup>−1</sup>) and 62.4% (5 to 17 A g<sup>−1</sup>) for NiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub>@CNT electrodes.https://www.mdpi.com/2079-4991/13/19/2643nickel–iron oxidespinel oxidecapacitancegalvanostatic charging/dischargingelectrochemical capacitor |
| spellingShingle | Ali H. Bashal Mahmoud A. Hefnawy Hoda A. Ahmed Mohamed A. El-Atawy Rami Adel Pashameah Shymaa S. Medany Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration Nanomaterials nickel–iron oxide spinel oxide capacitance galvanostatic charging/discharging electrochemical capacitor |
| title | Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration |
| title_full | Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration |
| title_fullStr | Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration |
| title_full_unstemmed | Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration |
| title_short | Green Synthesis of NiFe<sub>2</sub>O<sub>4</sub> Nano-Spinel Oxide-Decorated Carbon Nanotubes for Efficient Capacitive Performance—Effect of Electrolyte Concentration |
| title_sort | green synthesis of nife sub 2 sub o sub 4 sub nano spinel oxide decorated carbon nanotubes for efficient capacitive performance effect of electrolyte concentration |
| topic | nickel–iron oxide spinel oxide capacitance galvanostatic charging/discharging electrochemical capacitor |
| url | https://www.mdpi.com/2079-4991/13/19/2643 |
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