Asymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes

Handle URI:
http://hdl.handle.net/10754/605656
Title:
Asymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes
Authors:
Xia, Chuan ( 0000-0003-4526-159X ) ; Jiang, Qiu; Zhao, Chao ( 0000-0002-9582-1068 ) ; Beaujuge, Pierre; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
Asymmetric supercapacitors provide a promising approach to fabricate capacitive energy storage devices with high energy and power densities. In this work, asymmetric supercapacitors with excellent performance have been fabricated using ternary (Ni, Co)0.85Se on carbon fabric as bind-free positive electrode and porous free-standing graphene films as negative electrode. Owing to their metal-like conductivity (~1.67×106 S m−1), significant electrochemical activity, and superhydrophilic nature, our nanostructured ternary nickel cobalt selenides result in a much higher areal capacitance (2.33 F cm−2 at 4 mA cm−2), better rate performance and cycling stability than their binary selenide equivalents, and other ternary oxides and chalcogenides. Those hybrid supercapacitors can afford impressive areal capacitance and stack capacitance of 529.3 mF cm−2 and 6330 mF cm−3 at 1 mA cm−2, respectively. More impressively, our optimized asymmetric device operating at 1.8 V delivers a very high stack energy density of 2.85 mWh cm−3 at a stack power density of 10.76 mW cm−3, as well as 85% capacitance retention after 10,000 continuous charge-discharge cycles. Even at a high stack power density of 1173 mW cm−3, this device still deliveries a stack energy density of 1.19 mWh cm−3, superior to most of the reported supercapacitors.
KAUST Department:
Materials Science and Engineering (MSE)
Citation:
Asymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes 2016 Nano Energy
Publisher:
Elsevier BV
Journal:
Nano Energy
Issue Date:
14-Apr-2016
DOI:
10.1016/j.nanoen.2016.04.012
Type:
Article
ISSN:
22112855
Sponsors:
Research reported in this publication has been supported by King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S221128551630060X
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorXia, Chuanen
dc.contributor.authorJiang, Qiuen
dc.contributor.authorZhao, Chaoen
dc.contributor.authorBeaujuge, Pierreen
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2016-04-17T09:23:39Zen
dc.date.available2016-04-17T09:23:39Zen
dc.date.issued2016-04-14en
dc.identifier.citationAsymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes 2016 Nano Energyen
dc.identifier.issn22112855en
dc.identifier.doi10.1016/j.nanoen.2016.04.012en
dc.identifier.urihttp://hdl.handle.net/10754/605656en
dc.description.abstractAsymmetric supercapacitors provide a promising approach to fabricate capacitive energy storage devices with high energy and power densities. In this work, asymmetric supercapacitors with excellent performance have been fabricated using ternary (Ni, Co)0.85Se on carbon fabric as bind-free positive electrode and porous free-standing graphene films as negative electrode. Owing to their metal-like conductivity (~1.67×106 S m−1), significant electrochemical activity, and superhydrophilic nature, our nanostructured ternary nickel cobalt selenides result in a much higher areal capacitance (2.33 F cm−2 at 4 mA cm−2), better rate performance and cycling stability than their binary selenide equivalents, and other ternary oxides and chalcogenides. Those hybrid supercapacitors can afford impressive areal capacitance and stack capacitance of 529.3 mF cm−2 and 6330 mF cm−3 at 1 mA cm−2, respectively. More impressively, our optimized asymmetric device operating at 1.8 V delivers a very high stack energy density of 2.85 mWh cm−3 at a stack power density of 10.76 mW cm−3, as well as 85% capacitance retention after 10,000 continuous charge-discharge cycles. Even at a high stack power density of 1173 mW cm−3, this device still deliveries a stack energy density of 1.19 mWh cm−3, superior to most of the reported supercapacitors.en
dc.description.sponsorshipResearch reported in this publication has been supported by King Abdullah University of Science and Technology (KAUST).en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S221128551630060Xen
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Nano Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Nano Energy, 14 April 2016. DOI: 10.1016/j.nanoen.2016.04.012en
dc.subjectNickel cobalt selenideen
dc.subjectPorous graphene filmen
dc.subjectAsymmetric supercapacitoren
dc.subjectHigh conductivityen
dc.titleAsymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodesen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.identifier.journalNano Energyen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorXia, Chuanen
kaust.authorJiang, Qiuen
kaust.authorZhao, Chaoen
kaust.authorBeaujuge, Pierreen
kaust.authorAlshareef, Husam N.en
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