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dc.contributor.authorXia, Chuan
dc.contributor.authorJiang, Qiu
dc.contributor.authorZhao, Chao
dc.contributor.authorBeaujuge, Pierre
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2016-04-17T09:23:39Z
dc.date.available2016-04-17T09:23:39Z
dc.date.issued2016-04-14
dc.identifier.citationAsymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes 2016 Nano Energy
dc.identifier.issn22112855
dc.identifier.doi10.1016/j.nanoen.2016.04.012
dc.identifier.urihttp://hdl.handle.net/10754/605656
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.
dc.description.sponsorshipResearch reported in this publication has been supported by King Abdullah University of Science and Technology (KAUST).
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S221128551630060X
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.2016.04.012
dc.subjectNickel cobalt selenide
dc.subjectPorous graphene film
dc.subjectAsymmetric supercapacitor
dc.subjectHigh conductivity
dc.titleAsymmetric supercapacitors with metal-like ternary selenides and porous graphene electrodes
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentPhysical Characterization
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalNano Energy
dc.eprint.versionPost-print
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personXia, Chuan
kaust.personJiang, Qiu
kaust.personZhao, Chao
kaust.personBeaujuge, Pierre
kaust.personAlshareef, Husam N.
refterms.dateFOA2018-04-14T00:00:00Z
dc.date.published-online2016-04-14
dc.date.published-print2016-06


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