NiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors

Handle URI:
http://hdl.handle.net/10754/600666
Title:
NiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors
Authors:
Wang, Ruiqi; Xia, Chuan ( 0000-0003-4526-159X ) ; Wei, Nini; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
Ternary 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.
KAUST Department:
Materials Science and Engineering Program; The KAUST Schools (TKS)
Citation:
NiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors 2016 Electrochimica Acta
Publisher:
Elsevier BV
Journal:
Electrochimica Acta
Issue Date:
4-Mar-2016
DOI:
10.1016/j.electacta.2016.03.016
Type:
Article
ISSN:
00134686
Sponsors:
The 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.
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S001346861630531X
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Ruiqien
dc.contributor.authorXia, Chuanen
dc.contributor.authorWei, Ninien
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2016-03-06T13:15:23Zen
dc.date.available2016-03-06T13:15:23Zen
dc.date.issued2016-03-04en
dc.identifier.citationNiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitors 2016 Electrochimica Actaen
dc.identifier.issn00134686en
dc.identifier.doi10.1016/j.electacta.2016.03.016en
dc.identifier.urihttp://hdl.handle.net/10754/600666en
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.en
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.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S001346861630531Xen
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.2016.03.016en
dc.subjectTitanium nitride (TiN)en
dc.subjectCore–shellen
dc.subjectAtomic layer deposition (ALD)en
dc.subjectAll-solid-stateen
dc.subjectSupercapacitoren
dc.titleNiCo2O4@TiN Core-shell Electrodes through Conformal Atomic Layer Deposition for All-solid-state Supercapacitorsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentThe KAUST Schools (TKS)en
dc.identifier.journalElectrochimica Actaen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorWang, Ruiqien
kaust.authorXia, Chuanen
kaust.authorWei, Ninien
kaust.authorAlshareef, Husam N.en
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