Carbon nanocage supported synthesis of V2O5 nanorods and V2O5/TiO2 nanocomposites for Li-ion batteries

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dc.contributor.authorArmstrong, Mark J.
dc.contributor.authorBurke, David M.
dc.contributor.authorGabriel, Timothy
dc.contributor.authorO'Regan, Colm
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorPetkov, Nikolay
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2014-01-30T12:22:43Z
dc.date.available2014-08-27T04:00:05Z
dc.date.issued2013-09
dc.date.updated2013-09-24T10:48:43Z
dc.description.abstractWe present the facile synthesis of crystalline V2O5 nanorods and V2O5/TiO2 nanocomposites structures by a carbon nanocage (CNC)-assisted growth process, using vanadium triisopropoxide oxide and titanium isopropoxide precursors in air at 500 [degree]C. The diameters of the resultant V2O5 nanorods ranged between [similar]10 and 70 nm, while the crystalline V2O5/TiO2 nanocomposite structures adopted a unique morphology, due to both crystallisation and templating processes, with V2O5 adopting small-diameter nanowire and nanorod morphologies surrounded by sub-30 nm TiO2 nanoparticles. The V2O5 nanorods and V2O5/TiO2 nanocomposites were characterised by electron microscopy and X-ray diffraction techniques and subsequently reviewed as positive Li-ion electrodes. The phase-pure V2O5 nanorod structures exhibited appreciable Li+ storage properties over the potential range of 2.0-4.0 V vs. Li/Li+, displaying capacities of up to 288 mA h g-1 with appreciable cyclic behaviour at test rates of up to [similar]1 C. The crystalline V2O5/TiO2 nanocomposite structures displayed similar Li+ storage properties, however, increasing molar fractions of TiO2 led to a decline in the overall capacity versus the single-phase V2O5 counterparts. Interestingly, the Li+ insertion behaviour of the V2O5/TiO2 nanocomposite displayed character more-typical of amorphous V2O5, which was ascribed to a structural buffering effect of the inactive TiO2 phase.en
dc.description.sponsorshipScience Foundation Ireland (07/SRC/I1172); Science Foundation Ireland (08/CE/I1432); Science Foundation Ireland (09/SIRG/I1621);Higher Education Authority (Program for Research in Third Level Institutions (2007-2011) via the INSPIRE)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationARMSTRONG, M. J., BURKE, D. M., GABRIEL, T., O'REGAN, C., O'DWYER, C., PETKOV, N. & HOLMES, J. D. 2013. Carbon nanocage supported synthesis of V2O5 nanorods and V2O5/TiO2 nanocomposites for Li-ion batteries. Journal of Materials Chemistry A, 1, 12568-12578. doi: 10.1039/c3ta12652hen
dc.identifier.doi10.1039/c3ta12652h
dc.identifier.endpage12578en
dc.identifier.issn2050-7488
dc.identifier.issued40en
dc.identifier.journaltitleJournal of Materials Chemistry Aen
dc.identifier.startpage12568en
dc.identifier.urihttps://hdl.handle.net/10468/1352
dc.identifier.volume1en
dc.language.isoenen
dc.publisherThe Royal Society of Chemistryen
dc.relation.urihttp://pubs.rsc.org/en/Content/ArticleLanding/2013/TA/c3ta12652h#!divAbstract
dc.subjectV2O5/TiO2 nanocomposite synthesisen
dc.subjectV2O5 nanorods synthesisen
dc.subjectCarbon nanocage (CNC)-assisted growth processen
dc.subjectLi-ion batteriesen
dc.titleCarbon nanocage supported synthesis of V2O5 nanorods and V2O5/TiO2 nanocomposites for Li-ion batteriesen
dc.typeArticle (peer-reviewed)en
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