Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method
MXenes, such as Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, are promising materials for electrodes of supercapacitors (SCs). Colloidal techniques have potential for the fabrication of advanced Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub&...
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MDPI AG
2021-05-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/11/2930 |
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| author | Wenyu Liang Igor Zhitomirsky |
| author_facet | Wenyu Liang Igor Zhitomirsky |
| author_sort | Wenyu Liang |
| collection | DOAJ |
| description | MXenes, such as Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, are promising materials for electrodes of supercapacitors (SCs). Colloidal techniques have potential for the fabrication of advanced Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> composites with high areal capacitance (C<sub>S</sub>). This paper reports the fabrication of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-multiwalled carbon nanotube (CNT) electrodes, which show C<sub>S</sub> of 5.52 F cm<sup>−2</sup> in the negative potential range in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte. Good capacitive performance is achieved at a mass loading of 35 mg cm<sup>−2</sup> due to the use of Celestine blue (CB) as a co-dispersant for individual materials. The mechanisms of CB adsorption on Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>, Fe<sub>3</sub>O<sub>4</sub>, and CNTs and their electrostatic co-dispersion are discussed. The comparison of the capacitive behavior of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-CNT electrodes with Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-CNT and Fe<sub>3</sub>O<sub>4</sub>-CNT electrodes for the same active mass, electrode thickness and CNT content reveals a synergistic effect of the individual capacitive materials, which is observed due to the use of CB. The high C<sub>S</sub> of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-CNT composites makes them promising materials for application in negative electrodes of asymmetric SC devices. |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T10:54:24Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-2de3fc63e9fb40d585002ce07aa1f9322023-11-21T21:57:35ZengMDPI AGMaterials1996-19442021-05-011411293010.3390/ma14112930Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal MethodWenyu Liang0Igor Zhitomirsky1Department of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaDepartment of Materials Science and Engineering, McMaster University, Hamilton, ON L8S 4L7, CanadaMXenes, such as Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, are promising materials for electrodes of supercapacitors (SCs). Colloidal techniques have potential for the fabrication of advanced Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> composites with high areal capacitance (C<sub>S</sub>). This paper reports the fabrication of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-multiwalled carbon nanotube (CNT) electrodes, which show C<sub>S</sub> of 5.52 F cm<sup>−2</sup> in the negative potential range in 0.5 M Na<sub>2</sub>SO<sub>4</sub> electrolyte. Good capacitive performance is achieved at a mass loading of 35 mg cm<sup>−2</sup> due to the use of Celestine blue (CB) as a co-dispersant for individual materials. The mechanisms of CB adsorption on Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>, Fe<sub>3</sub>O<sub>4</sub>, and CNTs and their electrostatic co-dispersion are discussed. The comparison of the capacitive behavior of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-CNT electrodes with Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-CNT and Fe<sub>3</sub>O<sub>4</sub>-CNT electrodes for the same active mass, electrode thickness and CNT content reveals a synergistic effect of the individual capacitive materials, which is observed due to the use of CB. The high C<sub>S</sub> of Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub>-Fe<sub>3</sub>O<sub>4</sub>-CNT composites makes them promising materials for application in negative electrodes of asymmetric SC devices.https://www.mdpi.com/1996-1944/14/11/2930iron oxideMXenesupercapacitorelectrodedispersioncomposite |
| spellingShingle | Wenyu Liang Igor Zhitomirsky Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method Materials iron oxide MXene supercapacitor electrode dispersion composite |
| title | Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method |
| title_full | Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method |
| title_fullStr | Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method |
| title_full_unstemmed | Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method |
| title_short | Composite Fe<sub>3</sub>O<sub>4</sub>-MXene-Carbon Nanotube Electrodes for Supercapacitors Prepared Using the New Colloidal Method |
| title_sort | composite fe sub 3 sub o sub 4 sub mxene carbon nanotube electrodes for supercapacitors prepared using the new colloidal method |
| topic | iron oxide MXene supercapacitor electrode dispersion composite |
| url | https://www.mdpi.com/1996-1944/14/11/2930 |
| work_keys_str_mv | AT wenyuliang compositefesub3subosub4submxenecarbonnanotubeelectrodesforsupercapacitorspreparedusingthenewcolloidalmethod AT igorzhitomirsky compositefesub3subosub4submxenecarbonnanotubeelectrodesforsupercapacitorspreparedusingthenewcolloidalmethod |