A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs
In this paper, we report a simple and effective method to functionalize industrial-grade multi-walled carbon nanotubes (MWCNTs) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), via oxidation of MWCNTS and followed by carbodiimide coupling of amino-TEMPO. The effective coupling is confirmed and stu...
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| Format: | Article |
| Language: | English |
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Elsevier
2018
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| Online Access: | http://umpir.ump.edu.my/id/eprint/22159/1/A%20wide%20potential%20window%20symmetric%20supercapacitor%20by%20TEMPO1.pdf |
| _version_ | 1825812247341957120 |
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| author | Ali, Gomaa A. M. Megiel, Elzbieta Romański, Jan Algarni, H. K. F., Chong |
| author_facet | Ali, Gomaa A. M. Megiel, Elzbieta Romański, Jan Algarni, H. K. F., Chong |
| author_sort | Ali, Gomaa A. M. |
| collection | UMP |
| description | In this paper, we report a simple and effective method to functionalize industrial-grade multi-walled carbon nanotubes (MWCNTs) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), via oxidation of MWCNTS and followed by carbodiimide coupling of amino-TEMPO. The effective coupling is confirmed and studied by EPR, HRTEM, BET, XPS, FTIR, TGA and XRD techniques. Electrochemical studies reveal the capacitive enhancement of MWCNTs-TEMPO, where MWCNTs-TEMPO shows capacitance value (66 F g−1 at 0.25 A g−1) that is 5-times higher than that of industrial grade MWCNTs (13.5 F g−1 at 0.25 A g−1). This can be due to the reversible redox reaction of nitroxide radicals on TEMPO that contributes to pseudocapacitance. A symmetrical supercapacitor is assembled with MWCNTs-TEMPO as electrode material and optimized with wide operating voltage (2 V) to produce high energy density of 26.6 Wh kg−1 with high stability (90% capacitance retention over 4000 cycles). The findings propose a facile approach to modify industrial grade MWCNTs as the electrode materials in supercapacitors. |
| first_indexed | 2024-03-06T12:26:20Z |
| format | Article |
| id | UMPir22159 |
| institution | Universiti Malaysia Pahang |
| language | English |
| last_indexed | 2024-03-06T12:26:20Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | UMPir221592019-03-06T02:42:38Z http://umpir.ump.edu.my/id/eprint/22159/ A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs Ali, Gomaa A. M. Megiel, Elzbieta Romański, Jan Algarni, H. K. F., Chong Q Science (General) In this paper, we report a simple and effective method to functionalize industrial-grade multi-walled carbon nanotubes (MWCNTs) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), via oxidation of MWCNTS and followed by carbodiimide coupling of amino-TEMPO. The effective coupling is confirmed and studied by EPR, HRTEM, BET, XPS, FTIR, TGA and XRD techniques. Electrochemical studies reveal the capacitive enhancement of MWCNTs-TEMPO, where MWCNTs-TEMPO shows capacitance value (66 F g−1 at 0.25 A g−1) that is 5-times higher than that of industrial grade MWCNTs (13.5 F g−1 at 0.25 A g−1). This can be due to the reversible redox reaction of nitroxide radicals on TEMPO that contributes to pseudocapacitance. A symmetrical supercapacitor is assembled with MWCNTs-TEMPO as electrode material and optimized with wide operating voltage (2 V) to produce high energy density of 26.6 Wh kg−1 with high stability (90% capacitance retention over 4000 cycles). The findings propose a facile approach to modify industrial grade MWCNTs as the electrode materials in supercapacitors. Elsevier 2018 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/22159/1/A%20wide%20potential%20window%20symmetric%20supercapacitor%20by%20TEMPO1.pdf Ali, Gomaa A. M. and Megiel, Elzbieta and Romański, Jan and Algarni, H. and K. F., Chong (2018) A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs. Journal of Molecular Liquids, 271. pp. 31-39. ISSN 0167-7322. (Published) https://doi.org/10.1016/j.molliq.2018.08.123 |
| spellingShingle | Q Science (General) Ali, Gomaa A. M. Megiel, Elzbieta Romański, Jan Algarni, H. K. F., Chong A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title_full | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title_fullStr | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title_full_unstemmed | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title_short | A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs |
| title_sort | wide potential window symmetric supercapacitor by tempo functionalized mwcnts |
| topic | Q Science (General) |
| url | http://umpir.ump.edu.my/id/eprint/22159/1/A%20wide%20potential%20window%20symmetric%20supercapacitor%20by%20TEMPO1.pdf |
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