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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Main Authors:	Ali, Gomaa A. M., Megiel, Elzbieta, Romański, Jan, Algarni, H., K. F., Chong
Format:	Article
Language:	English
Published:	Elsevier 2018
Subjects:	Q Science (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/22159/ http://umpir.ump.edu.my/id/eprint/22159/ http://umpir.ump.edu.my/id/eprint/22159/1/A%20wide%20potential%20window%20symmetric%20supercapacitor%20by%20TEMPO1.pdf

id	ump-22159
recordtype	eprints
spelling	ump-221592019-03-06T02:42:38Z 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 https://doi.org/10.1016/j.molliq.2018.08.123
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	Q Science (General)
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
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.
format	Article
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.
title	A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs
title_short	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_sort	wide potential window symmetric supercapacitor by tempo functionalized mwcnts
publisher	Elsevier
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/22159/ http://umpir.ump.edu.my/id/eprint/22159/ http://umpir.ump.edu.my/id/eprint/22159/1/A%20wide%20potential%20window%20symmetric%20supercapacitor%20by%20TEMPO1.pdf
first_indexed	2023-09-18T22:32:50Z
last_indexed	2023-09-18T22:32:50Z
_version_	1777416400702275584

A wide potential window symmetric supercapacitor by TEMPO functionalized MWCNTs

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