Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte

Handle URI:
http://hdl.handle.net/10754/621084
Title:
Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte
Authors:
Baby, Rakhi Raghavan; Nagaraju, Doddahalli H.; Beaujuge, Pierre; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
VO2 is a low band-gap semiconductor with relatively high conductivity among transition metal oxides, which makes it an interesting material for supercapacitor electrode applications. The performance of VO2 as supercapacitor electrode in organic electrolytes has never been reported before. Herein, two-dimensional nanosheets of VO2 are prepared by the simultaneous solution reduction and exfoliation from bulk V2O5 powder by hydrothermal method. A specific capacitance of 405 Fg−1 is achieved for VO2 based supercapacitor in an organic electrolyte, in three electrode configuration. The symmetric capacitor based on VO2 nanosheet electrodes and the liquid organic electrolyte exhibits an energy density of 46 Wh kg−1 at a power density of 1.4 kW kg−1 at a constant current density of 1 Ag−1. Furthermore, flexible solid-state supercapacitors are fabricated using same electrode material and Alumina-silica based gel electrolyte. The solid-state device delivers a specific capacitance of 145 Fg−1 and a device capacitance of 36 Fg−1 at a discharge current density of 1 Ag−1. Series combination of three solid state capacitors is capable of lighting up a red LED for more than 1 minute.
KAUST Department:
Materials Science and Engineering Program
Citation:
Rakhi RB, Nagaraju DH, Beaujuge P, Alshareef HN (2016) Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte. Electrochimica Acta. Available: http://dx.doi.org/10.1016/j.electacta.2016.10.109.
Publisher:
Elsevier BV
Journal:
Electrochimica Acta
Issue Date:
16-Oct-2016
DOI:
10.1016/j.electacta.2016.10.109
Type:
Article
ISSN:
0013-4686
Sponsors:
Research reported in this publication has been supported by King Abdullah University of Science & Technology (KAUST). Authors thank ‘Advanced nanofabricationNanofabrication, Imaging and Characterization Laboratory and “Analytical Chemistry Core Laboratory” at KAUST. R.B.Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India and CSIR-NIIST Thiruvananthapuram, India.
Additional Links:
www.sciencedirect.com/science/article/pii/S0013468616322137
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBaby, Rakhi Raghavanen
dc.contributor.authorNagaraju, Doddahalli H.en
dc.contributor.authorBeaujuge, Pierreen
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2016-10-20T11:39:48Z-
dc.date.available2016-10-20T11:39:48Z-
dc.date.issued2016-10-16en
dc.identifier.citationRakhi RB, Nagaraju DH, Beaujuge P, Alshareef HN (2016) Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte. Electrochimica Acta. Available: http://dx.doi.org/10.1016/j.electacta.2016.10.109.en
dc.identifier.issn0013-4686en
dc.identifier.doi10.1016/j.electacta.2016.10.109en
dc.identifier.urihttp://hdl.handle.net/10754/621084-
dc.description.abstractVO2 is a low band-gap semiconductor with relatively high conductivity among transition metal oxides, which makes it an interesting material for supercapacitor electrode applications. The performance of VO2 as supercapacitor electrode in organic electrolytes has never been reported before. Herein, two-dimensional nanosheets of VO2 are prepared by the simultaneous solution reduction and exfoliation from bulk V2O5 powder by hydrothermal method. A specific capacitance of 405 Fg−1 is achieved for VO2 based supercapacitor in an organic electrolyte, in three electrode configuration. The symmetric capacitor based on VO2 nanosheet electrodes and the liquid organic electrolyte exhibits an energy density of 46 Wh kg−1 at a power density of 1.4 kW kg−1 at a constant current density of 1 Ag−1. Furthermore, flexible solid-state supercapacitors are fabricated using same electrode material and Alumina-silica based gel electrolyte. The solid-state device delivers a specific capacitance of 145 Fg−1 and a device capacitance of 36 Fg−1 at a discharge current density of 1 Ag−1. Series combination of three solid state capacitors is capable of lighting up a red LED for more than 1 minute.en
dc.description.sponsorshipResearch reported in this publication has been supported by King Abdullah University of Science & Technology (KAUST). Authors thank ‘Advanced nanofabricationNanofabrication, Imaging and Characterization Laboratory and “Analytical Chemistry Core Laboratory” at KAUST. R.B.Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India and CSIR-NIIST Thiruvananthapuram, India.en
dc.publisherElsevier BVen
dc.relation.urlwww.sciencedirect.com/science/article/pii/S0013468616322137en
dc.rights© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectVO2 nanosheetsen
dc.subjectFlexibleen
dc.subjectSupercapacitoren
dc.subjectEnergy densityen
dc.subjectSpecific capacitanceen
dc.titleSupercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyteen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalElectrochimica Actaen
dc.eprint.versionPost-printen
dc.contributor.institutionChemical Sciences and Technology division, CSIR- National Institute of Interdisciplinary Sciences (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, Indiaen
kaust.authorBaby, Rakhi Raghavanen
kaust.authorNagaraju, Doddahalli H.en
kaust.authorBeaujuge, Pierreen
kaust.authorAlshareef, Husam N.en
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