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dc.contributor.authorWang, Renqi
dc.contributor.authorXia, Chuan
dc.contributor.authorWei, Nini
dc.contributor.authorAlshareef, Husam N.
dc.date.accessioned2016-03-06T13:15:23Z
dc.date.available2016-03-06T13:15:23Z
dc.date.issued2016-03-12
dc.identifier.citationNiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors 2016 Electrochimica Acta
dc.identifier.issn00134686
dc.identifier.doi10.1016/j.electacta.2016.03.015
dc.identifier.urihttp://hdl.handle.net/10754/600666
dc.description.abstractTernary transition metal oxides such as NiCo2O4 show great promise as supercapacitor electrode materials. However, the unsatisfactory rate performance of NiCo2O4 may prove to be a major hurdle to its commercial usage. Herein, we report the development of NiCo2O4@TiN core–shell nanostructures for all-solid-state supercapacitors with significantly enhanced rate capability. We demonstrate that a thin layer of TiN conformally grown by atomic layer deposition (ALD) on NiCo2O4 nanofiber arrays plays a key role in improving their electrical conductivity, mechanical stability, and rate performance. Fabricated using the hybrid NiCo2O4@TiN electrodes, the symmetric all-solid-state supercapacitor exhibited an impressive stack power density of 58.205 mW cm−3 at a stack energy density of 0.061 mWh cm−3. To the best of our knowledge, these values are the highest of any NiCo2O4-based all-solid-state supercapacitor reported. Additionally, the resulting NiCo2O4@TiN all-solid-state device displayed outstanding cycling stability by retaining 70% of its original capacitance after 20,000 cycles at a high current density of 10 mA cm−2. These results illustrate the promise of ALD-assisted hybrid NiCo2O4@TiN electrodes for sustainable and integrated energy storage applications.
dc.description.sponsorshipThe research reported in this publication has been supported by King Abdullah University of Science and Technology (KAUST). Ruiqi Wang thanks the KAUST Visiting Student Research Program for the excellent opportunity. The authors thank the staff of the KAUST Nanofabrication, Thin Film, Imaging, and Characterization Core Laboratories for their wonderful support.
dc.language.isoen
dc.publisherElsevier BV
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S001346861630531X
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Electrochimica Acta. 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 Electrochimica Acta, 4 March 2016. DOI: 10.1016/j.electacta.2016.03.016
dc.subjectTitanium nitride (TiN)
dc.subjectCore–shell
dc.subjectAtomic layer deposition (ALD)
dc.subjectAll-solid-state
dc.subjectSupercapacitor
dc.titleNiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors
dc.typeArticle
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentFunctional Nanomaterials and Devices Research Group
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentThe KAUST School
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalElectrochimica Acta
dc.eprint.versionPost-print
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personWang, Renqi
kaust.personXia, Chuan
kaust.personWei, Nini
kaust.personAlshareef, Husam N.
refterms.dateFOA2018-03-04T00:00:00Z
dc.date.published-online2016-03-12
dc.date.published-print2016-04


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