Please use this identifier to cite or link to this item:
Title: Fabrication of high energy-density hybrid supercapacitors using electrospun V 2O 5 nanofibers with a self-supported carbon nanotube network
Authors: Aravindan, V.
Cheah, Y.L.
Mak, W.F.
Wee, G.
Chowdari, B.V.R. 
Madhavi, S.
Keywords: Electrochemical capacitors
V 2O 5 nanofibers
Issue Date: Jul-2012
Citation: Aravindan, V., Cheah, Y.L., Mak, W.F., Wee, G., Chowdari, B.V.R., Madhavi, S. (2012-07). Fabrication of high energy-density hybrid supercapacitors using electrospun V 2O 5 nanofibers with a self-supported carbon nanotube network. ChemPlusChem 77 (7) : 570-575. ScholarBank@NUS Repository.
Abstract: A simple electrospinning technique is employed for the preparation of high-performance V 2O 5 nanofibers. The fibers thus prepared are subjected to heat treatment under the optimized conditions at 400°C in air to achieve a single phase. The powder X-ray diffraction pattern confirms the formation of an orthorhombic structure with Pmmn space group. Morphological studies conducted by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM), clearly reveal the presence of a highly interconnected network of fibers with the diameter ranging from approximately 500-800 nm. After the heat treatment, translation of smooth fibrous morphology into porous fibers with embedded nanocrystals of V 2O 5 is noticed from the SEM measurements. The sintered V 2O 5 nanofibers are used to fabricate a hybrid electrochemical capacitor (HEC) and it is coupled with a substrate-free singlewalled carbon nanotube (SWCNT) network (called "Bucky paper") in a conventional organic electrolyte solution. Supercapacitive behavior of HEC is studied in both potentiostatic and galvanostatic modes at room temperature. The HEC demonstrated very stable and excellent cycling behavior during 3500 cycles of galvanostatic charge and discharge tests. This hybrid system is also well established during the rate capability studies from the applied current density of 30 to 210 mAg -1and delivered maximum energy and power densities of 18 Wh kg -1 and 315 Wkg -1, respectively. © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: ChemPlusChem
ISSN: 21926506
DOI: 10.1002/cplu.201200023
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Sep 18, 2020


checked on Sep 18, 2020

Page view(s)

checked on Sep 13, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.