Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires

Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials sho...

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Main Authors:	Rajan, Jose, Baiju, Vidyadharan, Archana, P. S., M. M., Yusoff, Jamil, Ismail
Format:	Article
Language:	English
Published:	Royal Society of Chemistry 2015
Subjects:	QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf

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spelling	ump-93092018-07-27T08:20:16Z http://umpir.ump.edu.my/id/eprint/9309/ Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials showing large specific capacitance are poorly abundant. In this paper, we show that niobium doped titanium dioxide (Nb:TiO2) nanowires developed by electrospinning have an order of magnitude higher capacitance (~280 Fg-1) than pristine TiO2 (~40 Fg-1) or zirconium doped TiO2 (~30 Fg-1). The cyclic voltammetry and charge discharge cycling experiments show that the Nb:TiO2¬ nanowires have 100% coulombic efficiency and could be operated over 5000 cycles without any appreciable capacitance degradation. The superior charge storage capability of the Nb:TiO2 is assigned to its high electrical conductivity as determined by electrochemical impedance spectroscopy. A practical supercapacitor is fabricated in asymmetric configuration using the Nb:TiO2 as anode and activated carbon as cathode. The device delivered energy densities of 16.3, 11.4 and 5.6 Whkg-1 at power densities of 770, 1310, and 1900 Wkg-1, respectively. These values are much superior than a control device fabricated using activated carbon as its both electrodes. Royal Society of Chemistry 2015-05-29 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf Rajan, Jose and Baiju, Vidyadharan and Archana, P. S. and M. M., Yusoff and Jamil, Ismail (2015) Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires. RSC Advances, 5. pp. 50087-50097. ISSN 2046-2069 http://dx.doi.org/10.1039/C5RA07633A DOI: 10.1039/C5RA07633A
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
description	Supercapacitors are emerging as a desirable energy storage medium in view of their order of magnitude higher power density than batteries and energy density than electronic capacitors. One of the key issues in the development of a suitable electrode material for supercapacitors is that materials showing large specific capacitance are poorly abundant. In this paper, we show that niobium doped titanium dioxide (Nb:TiO2) nanowires developed by electrospinning have an order of magnitude higher capacitance (~280 Fg-1) than pristine TiO2 (~40 Fg-1) or zirconium doped TiO2 (~30 Fg-1). The cyclic voltammetry and charge discharge cycling experiments show that the Nb:TiO2¬ nanowires have 100% coulombic efficiency and could be operated over 5000 cycles without any appreciable capacitance degradation. The superior charge storage capability of the Nb:TiO2 is assigned to its high electrical conductivity as determined by electrochemical impedance spectroscopy. A practical supercapacitor is fabricated in asymmetric configuration using the Nb:TiO2 as anode and activated carbon as cathode. The device delivered energy densities of 16.3, 11.4 and 5.6 Whkg-1 at power densities of 770, 1310, and 1900 Wkg-1, respectively. These values are much superior than a control device fabricated using activated carbon as its both electrodes.
format	Article
author	Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail
author_facet	Rajan, Jose Baiju, Vidyadharan Archana, P. S. M. M., Yusoff Jamil, Ismail
author_sort	Rajan, Jose
title	Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
title_short	Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
title_full	Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
title_fullStr	Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
title_full_unstemmed	Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires
title_sort	improved supercapacitive charge storage in electrospun niobium doped titania nanowires
publisher	Royal Society of Chemistry
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/ http://umpir.ump.edu.my/id/eprint/9309/1/Nb%20doped%20TiO2_RSC%20Advances.pdf
first_indexed	2023-09-18T22:07:45Z
last_indexed	2023-09-18T22:07:45Z
_version_	1777414822273482752

Improved Supercapacitive Charge Storage in Electrospun Niobium Doped Titania Nanowires

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