Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance
The purpose of this investigation was the development of a new colloidal route for the fabrication of Mn<sub>3</sub>O<sub>4</sub> electrodes for supercapacitors with enhanced charge storage performance. Mn<sub>3</sub>O<sub>4</sub>-carbon nanotube elect...
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| Format: | Article |
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MDPI AG
2022-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/5/1812 |
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| author | Wenjuan Yang Mohamed Nawwar Igor Zhitomirsky |
| author_facet | Wenjuan Yang Mohamed Nawwar Igor Zhitomirsky |
| author_sort | Wenjuan Yang |
| collection | DOAJ |
| description | The purpose of this investigation was the development of a new colloidal route for the fabrication of Mn<sub>3</sub>O<sub>4</sub> electrodes for supercapacitors with enhanced charge storage performance. Mn<sub>3</sub>O<sub>4</sub>-carbon nanotube electrodes were fabricated with record-high capacitances of 6.67 F cm<sup>−2</sup> obtained from cyclic voltammetry tests at a scan rate of 2 mV s<sup>−1</sup> and 7.55 F cm<sup>−2</sup> obtained from the galvanostatic charge–discharge tests at a current density of 3 mA cm<sup>−2</sup> in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte in a potential window of 0.9 V. The approach involves the use of murexide as a capping agent for the synthesis of Mn<sub>3</sub>O<sub>4</sub> and a co-dispersant for Mn<sub>3</sub>O<sub>4</sub> and carbon nanotubes. Good electrochemical performance of the electrode material was achieved at a high active mass loading of 40 mg cm<sup>−2</sup> and was linked to a reduced agglomeration of Mn<sub>3</sub>O<sub>4</sub> nanoparticles and efficient co-dispersion of Mn<sub>3</sub>O<sub>4</sub> with carbon nanotubes. The mechanisms of murexide adsorption on Mn<sub>3</sub>O<sub>4</sub> and carbon nanotube are discussed. With the proposed method, the time-consuming electrode activation procedure for Mn<sub>3</sub>O<sub>4</sub> electrodes can be avoided. The approach developed in this investigation paves the way for the fabrication of advanced cathodes for asymmetric supercapacitors and multifunctional devices, combining capacitive, magnetic, and other functional properties. |
| first_indexed | 2024-03-09T20:41:21Z |
| format | Article |
| id | doaj.art-f15d41bd5b0247cba96929450f936089 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T20:41:21Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f15d41bd5b0247cba96929450f9360892023-11-23T22:57:49ZengMDPI AGEnergies1996-10732022-03-01155181210.3390/en15051812Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced CapacitanceWenjuan Yang0Mohamed Nawwar1Igor Zhitomirsky2Department of Materials Science and Engineering, McMaster University, Hamilton, ON L8S4L7, CanadaDepartment of Materials Science and Engineering, McMaster University, Hamilton, ON L8S4L7, CanadaDepartment of Materials Science and Engineering, McMaster University, Hamilton, ON L8S4L7, CanadaThe purpose of this investigation was the development of a new colloidal route for the fabrication of Mn<sub>3</sub>O<sub>4</sub> electrodes for supercapacitors with enhanced charge storage performance. Mn<sub>3</sub>O<sub>4</sub>-carbon nanotube electrodes were fabricated with record-high capacitances of 6.67 F cm<sup>−2</sup> obtained from cyclic voltammetry tests at a scan rate of 2 mV s<sup>−1</sup> and 7.55 F cm<sup>−2</sup> obtained from the galvanostatic charge–discharge tests at a current density of 3 mA cm<sup>−2</sup> in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte in a potential window of 0.9 V. The approach involves the use of murexide as a capping agent for the synthesis of Mn<sub>3</sub>O<sub>4</sub> and a co-dispersant for Mn<sub>3</sub>O<sub>4</sub> and carbon nanotubes. Good electrochemical performance of the electrode material was achieved at a high active mass loading of 40 mg cm<sup>−2</sup> and was linked to a reduced agglomeration of Mn<sub>3</sub>O<sub>4</sub> nanoparticles and efficient co-dispersion of Mn<sub>3</sub>O<sub>4</sub> with carbon nanotubes. The mechanisms of murexide adsorption on Mn<sub>3</sub>O<sub>4</sub> and carbon nanotube are discussed. With the proposed method, the time-consuming electrode activation procedure for Mn<sub>3</sub>O<sub>4</sub> electrodes can be avoided. The approach developed in this investigation paves the way for the fabrication of advanced cathodes for asymmetric supercapacitors and multifunctional devices, combining capacitive, magnetic, and other functional properties.https://www.mdpi.com/1996-1073/15/5/1812manganese oxidecarbon nanotubeelectrodesupercapacitorcapping agentsynthesis |
| spellingShingle | Wenjuan Yang Mohamed Nawwar Igor Zhitomirsky Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance Energies manganese oxide carbon nanotube electrode supercapacitor capping agent synthesis |
| title | Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance |
| title_full | Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance |
| title_fullStr | Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance |
| title_full_unstemmed | Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance |
| title_short | Facile Route for Fabrication of Ferrimagnetic Mn<sub>3</sub>O<sub>4</sub> Spinel Material for Supercapacitors with Enhanced Capacitance |
| title_sort | facile route for fabrication of ferrimagnetic mn sub 3 sub o sub 4 sub spinel material for supercapacitors with enhanced capacitance |
| topic | manganese oxide carbon nanotube electrode supercapacitor capping agent synthesis |
| url | https://www.mdpi.com/1996-1073/15/5/1812 |
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