Influence of binders and solvents on stability of Ru/RuOx nanoparticles on ITO nanocrystals as Li–O2 battery cathodes

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dc.contributor.authorVankova, Svetoslava
dc.contributor.authorFrancia, Carlotta
dc.contributor.authorAmici, Julia
dc.contributor.authorZeng, Juqin
dc.contributor.authorBodoardo, Silvia
dc.contributor.authorPenazzi, Nerino
dc.contributor.authorCollins, Gillian
dc.contributor.authorGeaney, Hugh
dc.contributor.authorO'Dwyer, Colm
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderIrish Research Councilen
dc.contributor.funderNational University of Irelanden
dc.contributor.funderEuropean Commissionen
dc.contributor.funderSeventh Framework Programmeen
dc.date.accessioned2017-02-17T10:32:44Z
dc.date.available2017-02-17T10:32:44Z
dc.date.issued2017-01-23
dc.date.updated2017-02-17T10:04:48Z
dc.description.abstractFundamental research on Li–O2 batteries remains critical, and the nature of the reactions and stability are paramount for realising the promise of the Li–O2 system. We report that indium tin oxide (ITO) nanocrystals with supported 1–2 nm oxygen evolution reaction (OER) catalyst Ru/RuOx nanoparticles (NPs) demonstrate efficient OER processes, reduce the recharge overpotential of the cell significantly and maintain catalytic activity to promote a consistent cycling discharge potential in Li–O2 cells even when the ITO support nanocrystals deteriorate from the very first cycle. The Ru/RuOx nanoparticles lower the charge overpotential compared with those for ITO and carbon-only cathodes and have the greatest effect in DMSO electrolytes with a solution-processable F-free carboxymethyl cellulose (CMC) binder (<3.5 V) instead of polyvinylidene fluoride (PVDF). The Ru/RuOx/ITO nanocrystalline materials in DMSO provide efficient Li2O2 decomposition from within the cathode during cycling. We demonstrate that the ITO is actually unstable from the first cycle and is modified by chemical etching, but the Ru/RuOx NPs remain effective OER catalysts for Li2O2 during cycling. The CMC binders avoid PVDF-based side-reactions and improve the cyclability. The deterioration of the ITO nanocrystals is mitigated significantly in cathodes with a CMC binder, and the cells show good cycle life. In mixed DMSO–EMITFSI [EMITFSI=1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide] ionic liquid electrolytes, the Ru/RuOx/ITO materials in Li–O2 cells cycle very well and maintain a consistently very low charge overpotential of 0.5–0.8 V.en
dc.description.sponsorshipScience Foundation Ireland ((SFI Technology Innovation and Development Award under contract no. 13/TIDA/E2761), (SFI research grant under Grant Number 14/IA/2581)); Irish Research Council (New Foundations Award); National University of Ireland (Fellowship in the Sciences)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationVankova, S., Francia, C., Amici, J., Zeng, J., Bodoardo, S., Penazzi, N., Collins, G., Geaney, H. and O'Dwyer, C. (2017) 'Influence of Binders and Solvents on Stability of Ru/RuOx Nanoparticles on ITO Nanocrystals as Li–O2 Battery Cathodes', ChemSusChem, 10(3), pp. 575-586. doi:10.1002/cssc.201601301en
dc.identifier.doi10.1002/cssc.201601301
dc.identifier.endpage586en
dc.identifier.issn1864-5631
dc.identifier.journaltitleChemsuschemen
dc.identifier.startpage575en
dc.identifier.urihttps://hdl.handle.net/10468/3650
dc.identifier.volume10en
dc.language.isoenen
dc.publisherWiley-VCH Verlagen
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.rights© 2017 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim. This is the peer reviewed version of the following article: ChemSusChem 2017, 10, 575, which has been published in final form at http://dx.doi.org/10.1002/cssc.201601301. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.en
dc.subjectBatteriesen
dc.subjectLithiumen
dc.subjectNanoparticlesen
dc.subjectOxygenen
dc.subjectEvolutionen
dc.subjectReactionen
dc.subjectRutheniumen
dc.titleInfluence of binders and solvents on stability of Ru/RuOx nanoparticles on ITO nanocrystals as Li–O2 battery cathodesen
dc.typeArticle (peer-reviewed)en
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