Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes

We report on the capacitive performance of redox active cysteamine-functionalized multi walled carbon nanotubes (MWCNTs-Cyst). The thiol functional groups are found to be oxidized into sulfinic acid groups during functionalization of MWCNTs-Cyst, rendering the functional groups act as the molecular...

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Main Authors:	Ali, Gomaa A. M., Ellie Yi, Lih Teo, Aboelazm, Eslam A. A., Sadegh, Hamidreza, Memar, Amir O. H., Shahryari-Ghoshekandi, Ramin, K. F., Chong
Format:	Article
Language:	English
Published:	Elsevier 2017
Subjects:	QD Chemistry
Online Access:	http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/1/fist-2017-gomaa-Capacitive%20performance%20of%20cysteamine%20functionalized1.pdf

id	ump-17867
recordtype	eprints
spelling	ump-178672020-02-28T01:24:48Z http://umpir.ump.edu.my/id/eprint/17867/ Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes Ali, Gomaa A. M. Ellie Yi, Lih Teo Aboelazm, Eslam A. A. Sadegh, Hamidreza Memar, Amir O. H. Shahryari-Ghoshekandi, Ramin K. F., Chong QD Chemistry We report on the capacitive performance of redox active cysteamine-functionalized multi walled carbon nanotubes (MWCNTs-Cyst). The thiol functional groups are found to be oxidized into sulfinic acid groups during functionalization of MWCNTs-Cyst, rendering the functional groups act as the molecular spacer to prevent MWCNTs agglomeration and the redox active sulfinic acid groups provides pseudocapacitance effect. The specific capacitance attained on MWCNTs-Cyst is found to be approximately 4-times higher than the nonfunctionalized MWCNTs electrodes. The enhancement can be attributed to the surface area enhancement in MWCNTs-Cyst and the pseudocapacitance effect. Ex situ spectroscopy (XPS and FTIR) confirms pseudocapacitive behavior of sulfinic acid groups, which undergo redox reaction into sulfenic acid groups upon charging and discharging process. Impedance study reveals the charge transfer process is facilitated by the redox reaction of sulfinic acid groups, thus lowering the charge transfer resistance. Interestingly, the supercapacitor made from MWCNTs-Cyst remains highly stable (90% retention) even after long cycle of charge-discharge operation (11,000 cycles). Elsevier 2017 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/17867/1/fist-2017-gomaa-Capacitive%20performance%20of%20cysteamine%20functionalized1.pdf Ali, Gomaa A. M. and Ellie Yi, Lih Teo and Aboelazm, Eslam A. A. and Sadegh, Hamidreza and Memar, Amir O. H. and Shahryari-Ghoshekandi, Ramin and K. F., Chong (2017) Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes. Materials Chemistry and Physics, 197. pp. 100-104. ISSN 0254-0584 https://doi.org/10.1016/j.matchemphys.2017.05.019 doi: 10.1016/j.matchemphys.2017.05.019
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Ali, Gomaa A. M. Ellie Yi, Lih Teo Aboelazm, Eslam A. A. Sadegh, Hamidreza Memar, Amir O. H. Shahryari-Ghoshekandi, Ramin K. F., Chong Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
description	We report on the capacitive performance of redox active cysteamine-functionalized multi walled carbon nanotubes (MWCNTs-Cyst). The thiol functional groups are found to be oxidized into sulfinic acid groups during functionalization of MWCNTs-Cyst, rendering the functional groups act as the molecular spacer to prevent MWCNTs agglomeration and the redox active sulfinic acid groups provides pseudocapacitance effect. The specific capacitance attained on MWCNTs-Cyst is found to be approximately 4-times higher than the nonfunctionalized MWCNTs electrodes. The enhancement can be attributed to the surface area enhancement in MWCNTs-Cyst and the pseudocapacitance effect. Ex situ spectroscopy (XPS and FTIR) confirms pseudocapacitive behavior of sulfinic acid groups, which undergo redox reaction into sulfenic acid groups upon charging and discharging process. Impedance study reveals the charge transfer process is facilitated by the redox reaction of sulfinic acid groups, thus lowering the charge transfer resistance. Interestingly, the supercapacitor made from MWCNTs-Cyst remains highly stable (90% retention) even after long cycle of charge-discharge operation (11,000 cycles).
format	Article
author	Ali, Gomaa A. M. Ellie Yi, Lih Teo Aboelazm, Eslam A. A. Sadegh, Hamidreza Memar, Amir O. H. Shahryari-Ghoshekandi, Ramin K. F., Chong
author_facet	Ali, Gomaa A. M. Ellie Yi, Lih Teo Aboelazm, Eslam A. A. Sadegh, Hamidreza Memar, Amir O. H. Shahryari-Ghoshekandi, Ramin K. F., Chong
author_sort	Ali, Gomaa A. M.
title	Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
title_short	Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
title_full	Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
title_fullStr	Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
title_full_unstemmed	Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes
title_sort	capacitive performance of cysteamine functionalized carbon nanotubes
publisher	Elsevier
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/ http://umpir.ump.edu.my/id/eprint/17867/1/fist-2017-gomaa-Capacitive%20performance%20of%20cysteamine%20functionalized1.pdf
first_indexed	2023-09-18T22:24:57Z
last_indexed	2023-09-18T22:24:57Z
_version_	1777415903993921536

Capacitive Performance of Cysteamine Functionalized Carbon Nanotubes

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