Enhancement of the energy storage properties of supercapacitors using graphene nanosheets dispersed with metal oxide-loaded carbon nanotubes

Handle URI:
http://hdl.handle.net/10754/561887
Title:
Enhancement of the energy storage properties of supercapacitors using graphene nanosheets dispersed with metal oxide-loaded carbon nanotubes
Authors:
Baby, Rakhi Raghavan; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
Graphene nanosheets (GNs) dispersed with SnO2 nanoparticles loaded multiwalled carbon nanotubes (SnO2-MWCNTs) were investigated as electrode materials for supercapacitors. SnO2-MWCNTs were obtained by a chemical method followed by calcination. GNs/SnO2-MWCNTs nanocomposites were prepared by ultrasonication of the GNs and SnO 2-MWCNTs. Electrochemical double layer capacitors were fabricated using the composite as the electrode material and aqueous KOH as the electrolyte. Electrochemical performance of the composite electrodes were compared to that of pure GNs electrodes and the results are discussed. Electrochemical measurements show that the maximum specific capacitance, power density and energy density obtained for supercapacitor using GNs/SnO 2-MWCNTs nanocomposite electrodes were respectively 224 F g -1, 17.6 kW kg-1 and 31 Wh kg-1. The fabricated supercapacitor device exhibited excellent cycle life with ∼81% of the initial specific capacitance retained after 6000 cycles. The results suggest that the hybrid composite is a promising supercapacitor electrode material. © 2011 Elsevier B.V. All rights reserved.
KAUST Department:
Materials Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Functional Nanomaterials and Devices Research Group
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
Issue Date:
Oct-2011
DOI:
10.1016/j.jpowsour.2011.06.038
Type:
Article
ISSN:
03787753
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBaby, Rakhi Raghavanen
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2015-08-03T09:33:21Zen
dc.date.available2015-08-03T09:33:21Zen
dc.date.issued2011-10en
dc.identifier.issn03787753en
dc.identifier.doi10.1016/j.jpowsour.2011.06.038en
dc.identifier.urihttp://hdl.handle.net/10754/561887en
dc.description.abstractGraphene nanosheets (GNs) dispersed with SnO2 nanoparticles loaded multiwalled carbon nanotubes (SnO2-MWCNTs) were investigated as electrode materials for supercapacitors. SnO2-MWCNTs were obtained by a chemical method followed by calcination. GNs/SnO2-MWCNTs nanocomposites were prepared by ultrasonication of the GNs and SnO 2-MWCNTs. Electrochemical double layer capacitors were fabricated using the composite as the electrode material and aqueous KOH as the electrolyte. Electrochemical performance of the composite electrodes were compared to that of pure GNs electrodes and the results are discussed. Electrochemical measurements show that the maximum specific capacitance, power density and energy density obtained for supercapacitor using GNs/SnO 2-MWCNTs nanocomposite electrodes were respectively 224 F g -1, 17.6 kW kg-1 and 31 Wh kg-1. The fabricated supercapacitor device exhibited excellent cycle life with ∼81% of the initial specific capacitance retained after 6000 cycles. The results suggest that the hybrid composite is a promising supercapacitor electrode material. © 2011 Elsevier B.V. All rights reserved.en
dc.publisherElsevier BVen
dc.subjectGraphene nanosheetsen
dc.subjectSnO2 loaded MWCNTs, Specific capacitance, Energy density, Power density, Cycle lifeen
dc.subjectSupercapacitoren
dc.titleEnhancement of the energy storage properties of supercapacitors using graphene nanosheets dispersed with metal oxide-loaded carbon nanotubesen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentFunctional Nanomaterials and Devices Research Groupen
dc.identifier.journalJournal of Power Sourcesen
kaust.authorBaby, Rakhi Raghavanen
kaust.authorAlshareef, Husam N.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.