Comparative electrochemical charge storage properties of bulk and nanoscale vanadium oxide electrodes

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dc.contributor.authorMcNulty, David
dc.contributor.authorBuckley, D. Noel
dc.contributor.authorO'Dwyer, Colm
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderSeventh Framework Programmeen
dc.date.accessioned2018-05-09T11:57:37Z
dc.date.available2018-05-09T11:57:37Z
dc.date.issued2016-02-20
dc.date.updated2018-05-03T07:34:53Z
dc.description.abstractVanadium oxide nanostructures have been widely researched as a cathode material for Li-ion batteries due to their layered structure and shorter Li+ diffusion path lengths, compared to the bulk material. Some oxides exhibit charge storage due to capacitive charge compensation, and many materials with cation insertion regions and rich surface chemistry have complex responses to lithiation. Herein, detailed analysis by cyclic voltammetry was used to distinguish the charge stored due to lithium intercalation processes from extrinsic capacitive effects for micron-scale bulk V2O5 and synthesized nano-scale vanadium oxide polycrystalline nanorods (poly-NRs), designed to exhibit multivalent surface oxidation states. The results demonstrate that at fast scan rates (up to 500 mV/s), the contributions due to diffusion-controlled intercalation processes for micron-scale V2O5 and nanoscale V2O3 are found to dominate irrespective of size and multivalent surface chemistry. At slow potential scan rates, a greater portion of the redox events are capacitive in nature for the polycrystalline nanorods. Low dimensional vanadium oxide structures of V2O5 or V2O3, with greater surface area do not automatically increase their (redox) pseudocapacitive behaviour significantly at any scan rate, even with multivalent surface oxidation states.en
dc.description.sponsorshipHigher Education Authority (INSPIRE programme, funded by the Irish Government’s Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007–2013.)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMcNulty, D., Buckley, D. N. and O’Dwyer, C. (2016) 'Comparative Electrochemical Charge Storage Properties of Bulk and Nanoscale Vanadium Oxide Electrodes', Journal of Solid State Electrochemistry, 20(5), pp. 1445-1458. doi: 10.1007/s10008-016-3154-2en
dc.identifier.doi10.1007/s10008-016-3154-2
dc.identifier.endpage1458en
dc.identifier.issn1433-0768
dc.identifier.journaltitleJournal of Solid State Electrochemistryen
dc.identifier.startpage1445en
dc.identifier.urihttps://hdl.handle.net/10468/6048
dc.identifier.volume20en
dc.language.isoenen
dc.publisherSpringer Verlagen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/Charles Parsons Energy Research Awards/06/CP/E007/IE/Charles Parsons Research Initiative & Graduate School/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/13/TIDA/E2761/IE/LiONSKIN - Moldable Li-ion battery outer skin for electronic devices/en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP1::NMP/314508/EU/STable high-capacity lithium-Air Batteries with Long cycle life for Electric cars/STABLEen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/en
dc.relation.urihttp://link.springer.com/article/10.1007/s10008-016-3154-2
dc.rights© Springer-Verlag Berlin Heidelberg 2016. This is a post-peer-review, pre-copyedit version of an article published in Journal of Solid State Electrochemistry. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10008-016-3154-2en
dc.subjectSpecific capacityen
dc.subjectVanadium Oxideen
dc.subjectIntercalation processen
dc.subjectDiffusion path lengthen
dc.subjectCapacitive effecten
dc.titleComparative electrochemical charge storage properties of bulk and nanoscale vanadium oxide electrodesen
dc.typeArticle (peer-reviewed)en
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