Nanostructured cobalt sulfide-on-fiber with tunable morphology as electrodes for asymmetric hybrid supercapacitors

Handle URI:
http://hdl.handle.net/10754/563238
Title:
Nanostructured cobalt sulfide-on-fiber with tunable morphology as electrodes for asymmetric hybrid supercapacitors
Authors:
Baby, Rakhi Raghavan; Alhebshi, Nuha ( 0000-0002-2573-7979 ) ; Anjum, Dalaver H.; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
Porous cobalt sulfide (Co9S8) nanostructures with tunable morphology, but identical crystal phase and composition, have been directly nucleated over carbon fiber and evaluated as electrodes for asymmetric hybrid supercapacitors. As the morphology is changed from two-dimensional (2D) nanoflakes to 3D octahedra, dramatic changes in supercapacitor performance are observed. In three-electrode configuration, the binder-free Co9S82D nanoflake electrodes show a high specific capacitance of 1056 F g-1at 5 mV s-1vs. 88 F g-1for the 3D electrodes. As sulfides are known to have low operating potential, for the first time, asymmetric hybrid supercapacitors are constructed from Co9S8nanostructures and activated carbon (AC), providing an operation potential from 0 to 1.6 V. At a constant current density of 1 A g-1, the 2D Co9S8, nanoflake//AC asymmetric hybrid supercapacitor exhibits a gravimetric cell capacitance of 82.9 F g-1, which is much higher than that of an AC//AC symmetric capacitor (44.8 F g-1). Moreover, the asymmetric hybrid supercapacitor shows an excellent energy density of 31.4 W h kg-1at a power density of 200 W Kg-1and an excellent cycling stability with a capacitance retention of ∼90% after 5000 cycles. This journal is
KAUST Department:
Materials Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Core Labs; Functional Nanomaterials and Devices Research Group
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. A
Issue Date:
2014
DOI:
10.1039/c4ta03341h
Type:
Article
ISSN:
20507488
Sponsors:
Research reported in this publication has been supported by King Abdullah University of Science & Technology (KAUST). Authors thank the 'Advanced Nanofabrication, Imaging and Characterization Laboratory' and 'Analytical Chemistry Laboratory' at KAUST. R. B. R. acknowledges the financial support from SABIC Post-Doctoral Fellowship.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBaby, Rakhi Raghavanen
dc.contributor.authorAlhebshi, Nuhaen
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2015-08-03T11:43:51Zen
dc.date.available2015-08-03T11:43:51Zen
dc.date.issued2014en
dc.identifier.issn20507488en
dc.identifier.doi10.1039/c4ta03341hen
dc.identifier.urihttp://hdl.handle.net/10754/563238en
dc.description.abstractPorous cobalt sulfide (Co9S8) nanostructures with tunable morphology, but identical crystal phase and composition, have been directly nucleated over carbon fiber and evaluated as electrodes for asymmetric hybrid supercapacitors. As the morphology is changed from two-dimensional (2D) nanoflakes to 3D octahedra, dramatic changes in supercapacitor performance are observed. In three-electrode configuration, the binder-free Co9S82D nanoflake electrodes show a high specific capacitance of 1056 F g-1at 5 mV s-1vs. 88 F g-1for the 3D electrodes. As sulfides are known to have low operating potential, for the first time, asymmetric hybrid supercapacitors are constructed from Co9S8nanostructures and activated carbon (AC), providing an operation potential from 0 to 1.6 V. At a constant current density of 1 A g-1, the 2D Co9S8, nanoflake//AC asymmetric hybrid supercapacitor exhibits a gravimetric cell capacitance of 82.9 F g-1, which is much higher than that of an AC//AC symmetric capacitor (44.8 F g-1). Moreover, the asymmetric hybrid supercapacitor shows an excellent energy density of 31.4 W h kg-1at a power density of 200 W Kg-1and an excellent cycling stability with a capacitance retention of ∼90% after 5000 cycles. This journal isen
dc.description.sponsorshipResearch reported in this publication has been supported by King Abdullah University of Science & Technology (KAUST). Authors thank the 'Advanced Nanofabrication, Imaging and Characterization Laboratory' and 'Analytical Chemistry Laboratory' at KAUST. R. B. R. acknowledges the financial support from SABIC Post-Doctoral Fellowship.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleNanostructured cobalt sulfide-on-fiber with tunable morphology as electrodes for asymmetric hybrid supercapacitorsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentCore Labsen
dc.contributor.departmentFunctional Nanomaterials and Devices Research Groupen
dc.identifier.journalJ. Mater. Chem. Aen
kaust.authorBaby, Rakhi Raghavanen
kaust.authorAlhebshi, Nuhaen
kaust.authorAnjum, Dalaver H.en
kaust.authorAlshareef, Husam N.en
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