Direct chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applications

Handle URI:
http://hdl.handle.net/10754/617087
Title:
Direct chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applications
Authors:
Baby, Rakhi Raghavan; Ahmed, Bilal ( 0000-0002-6707-822X ) ; Anjum, Dalaver H.; Alshareef, Husam N. ( 0000-0001-5029-2142 )
Abstract:
Transition metal carbides (MXenes) are an emerging class of two dimensional (2D) materials with promising electrochemical energy storage performance. Herein, for the first time, by direct chemical synthesis, nanocrystalline ε-MnO2 whiskers were formed on MXene nanosheet surfaces (ε-MnO2/Ti2CTx and ε-MnO2/Ti3C2Tx) to make nanocomposite electrodes for aqueous pseudocapacitors. The ε-MnO2 nanowhiskers increase the surface area of the composite electrode and enhance the specific capacitance by nearly three orders of magnitude compared to pure MXene based symmetric supercapacitors. Combined with enhanced pseudocapacitance, the fabricated ε-MnO2/MXene supercapacitors exhibited excellent cycling stability with ~88% of the initial specific capacitance retained after 10000 cycles which is much higher than pure ε-MnO2 based supercapacitors (~74%). The proposed electrode structure capitalizes on the high specific capacitance of MnO2 and the ability of MXenes to improve conductivity and cycling stability.
KAUST Department:
Materials Science and Engineering (MSE)
Citation:
Direct chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applications 2016 ACS Applied Materials & Interfaces
Publisher:
American Chemical Society (ACS)
Journal:
ACS Applied Materials & Interfaces
Issue Date:
5-Jul-2016
DOI:
10.1021/acsami.6b04481
Type:
Article
ISSN:
1944-8244; 1944-8252
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.Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India and CSIR-NIIST Thiruvananthapuram, India.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acsami.6b04481
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorBaby, Rakhi Raghavanen
dc.contributor.authorAhmed, Bilalen
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorAlshareef, Husam N.en
dc.date.accessioned2016-07-18T09:18:32Z-
dc.date.available2016-07-18T09:18:32Z-
dc.date.issued2016-07-05-
dc.identifier.citationDirect chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applications 2016 ACS Applied Materials & Interfacesen
dc.identifier.issn1944-8244-
dc.identifier.issn1944-8252-
dc.identifier.doi10.1021/acsami.6b04481-
dc.identifier.urihttp://hdl.handle.net/10754/617087-
dc.description.abstractTransition metal carbides (MXenes) are an emerging class of two dimensional (2D) materials with promising electrochemical energy storage performance. Herein, for the first time, by direct chemical synthesis, nanocrystalline ε-MnO2 whiskers were formed on MXene nanosheet surfaces (ε-MnO2/Ti2CTx and ε-MnO2/Ti3C2Tx) to make nanocomposite electrodes for aqueous pseudocapacitors. The ε-MnO2 nanowhiskers increase the surface area of the composite electrode and enhance the specific capacitance by nearly three orders of magnitude compared to pure MXene based symmetric supercapacitors. Combined with enhanced pseudocapacitance, the fabricated ε-MnO2/MXene supercapacitors exhibited excellent cycling stability with ~88% of the initial specific capacitance retained after 10000 cycles which is much higher than pure ε-MnO2 based supercapacitors (~74%). The proposed electrode structure capitalizes on the high specific capacitance of MnO2 and the ability of MXenes to improve conductivity and cycling stability.en
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.Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India and CSIR-NIIST Thiruvananthapuram, India.en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acsami.6b04481en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acsami.6b04481.en
dc.titleDirect chemical synthesis of MnO2 nanowhiskers on MXene surfaces for supercapacitor applicationsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.identifier.journalACS Applied Materials & Interfacesen
dc.eprint.versionPost-printen
dc.contributor.institutionChemical Sciences and Technology division, CSIR-National Institute of Interdisciplinary Sciences and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, India, 695019en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorBaby, Rakhi Raghavanen
kaust.authorAhmed, Bilalen
kaust.authorAnjum, Dalaver H.en
kaust.authorAlshareef, Husam N.en
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