Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites
This investigation addresses increasing interest in advanced composite materials, combining capacitive properties and spontaneous magnetization for energy storage applications in supercapacitors. The capacitive properties of ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub> (NFO) s...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/8/2/51 |
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| author | Michael MacDonald Igor Zhitomirsky |
| author_facet | Michael MacDonald Igor Zhitomirsky |
| author_sort | Michael MacDonald |
| collection | DOAJ |
| description | This investigation addresses increasing interest in advanced composite materials, combining capacitive properties and spontaneous magnetization for energy storage applications in supercapacitors. The capacitive properties of ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub> (NFO) spinel nanoparticles with magnetization of 30 emu g<sup>−1</sup> were enhanced using high-energy ball-milling and the use of advanced dispersant, which facilitated charge transfer. NFO electrodes with an active mass of 40 mg cm<sup>−2</sup> showed a capacitance of 1.46 F cm<sup>−2</sup> in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte in a negative potential range. The charging mechanism in the negative potential range in Na<sub>2</sub>SO<sub>4</sub> electrolyte was proposed. NFO was combined with conductive polypyrrole polymer for the fabrication of composites. The analysis of the capacitive behavior of the composites using cyclic voltammetry, chronopotentiometry and impedance spectroscopy at different electrode potentials revealed synergy of contributions of NFO and PPy. The highest capacitance of 6.64 F cm<sup>−2</sup> was obtained from cyclic voltammetry data. The capacitance, impedance, and magnetic properties can be varied by variation of electrode composition. Composite electrodes are promising for application in anodes of asymmetric magnetic supercapacitors for energy storage and magnetically enhanced capacitive water purification devices. |
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| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-07T22:26:19Z |
| publishDate | 2024-01-01 |
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| series | Journal of Composites Science |
| spelling | doaj.art-0d38a9428e274634b9f7a5f6b014b3ce2024-02-23T15:22:34ZengMDPI AGJournal of Composites Science2504-477X2024-01-01825110.3390/jcs8020051Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole NanocompositesMichael MacDonald0Igor Zhitomirsky1Department of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaDepartment of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaThis investigation addresses increasing interest in advanced composite materials, combining capacitive properties and spontaneous magnetization for energy storage applications in supercapacitors. The capacitive properties of ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub> (NFO) spinel nanoparticles with magnetization of 30 emu g<sup>−1</sup> were enhanced using high-energy ball-milling and the use of advanced dispersant, which facilitated charge transfer. NFO electrodes with an active mass of 40 mg cm<sup>−2</sup> showed a capacitance of 1.46 F cm<sup>−2</sup> in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte in a negative potential range. The charging mechanism in the negative potential range in Na<sub>2</sub>SO<sub>4</sub> electrolyte was proposed. NFO was combined with conductive polypyrrole polymer for the fabrication of composites. The analysis of the capacitive behavior of the composites using cyclic voltammetry, chronopotentiometry and impedance spectroscopy at different electrode potentials revealed synergy of contributions of NFO and PPy. The highest capacitance of 6.64 F cm<sup>−2</sup> was obtained from cyclic voltammetry data. The capacitance, impedance, and magnetic properties can be varied by variation of electrode composition. Composite electrodes are promising for application in anodes of asymmetric magnetic supercapacitors for energy storage and magnetically enhanced capacitive water purification devices.https://www.mdpi.com/2504-477X/8/2/51supercapacitorferritepolypyrrolecompositecapacitance |
| spellingShingle | Michael MacDonald Igor Zhitomirsky Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites Journal of Composites Science supercapacitor ferrite polypyrrole composite capacitance |
| title | Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites |
| title_full | Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites |
| title_fullStr | Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites |
| title_full_unstemmed | Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites |
| title_short | Capacitive Properties of Ferrimagnetic NiFe<sub>2</sub>O<sub>4</sub>-Conductive Polypyrrole Nanocomposites |
| title_sort | capacitive properties of ferrimagnetic nife sub 2 sub o sub 4 sub conductive polypyrrole nanocomposites |
| topic | supercapacitor ferrite polypyrrole composite capacitance |
| url | https://www.mdpi.com/2504-477X/8/2/51 |
| work_keys_str_mv | AT michaelmacdonald capacitivepropertiesofferrimagneticnifesub2subosub4subconductivepolypyrrolenanocomposites AT igorzhitomirsky capacitivepropertiesofferrimagneticnifesub2subosub4subconductivepolypyrrolenanocomposites |