Electrochemical investigation of the role of MnO2 nanorod catalysts in water containing and anhydrous electrolytes for Li-O2 battery applications

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dc.contributor.author Geaney, Hugh
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-05-10T10:46:40Z
dc.date.available 2018-05-10T10:46:40Z
dc.date.issued 2015-01-28
dc.identifier.citation Geaney, H. and O'Dwyer, C. (2015) 'Electrochemical investigation of the role of MnO2 nanorod catalysts in water containing and anhydrous electrolytes for Li-O2 battery applications', Physical Chemistry Chemical Physics, 17(10), pp. 6748-6759. doi: 10.1039/C4CP05785F en
dc.identifier.volume 17 en
dc.identifier.issued 10 en
dc.identifier.startpage 6748 en
dc.identifier.endpage 6759 en
dc.identifier.issn 1463-9076
dc.identifier.uri http://hdl.handle.net/10468/6057
dc.identifier.doi 10.1039/C4CP05785F
dc.description.abstract The electrochemical behaviour of MnO2 nanorod and Super P carbon based Li-O2 battery cathodes in water-containing sulfolane and anhydrous DMSO electrolytes are shown to be linked to specific discharge product formation. During discharge, large layered spherical agglomerates of LiOH were characteristically formed on the MnO2 cathodes while smaller, toroidal, spherical Li2O2 particles and films were formed on the Super P cathodes. In an anhydrous DMSO based electrolyte the LiOH structures were also found on cathodes discharged in the anhydrous electrolyte, suggesting that MnO2 initiates electrochemical decomposition of the DMSO electrolyte to form LiOH via H2O reactions with Li2O2. The LiOH crystals are uniquely formed on MnO2, and segregated to this phase even in mixed oxide-carbon cathodes. In contrast, no Li2O2 toroids were noted on Super P cathodes discharged in the DMSO based electrolytes. Instead, the morphology varied from smaller sheets (at high discharge current) to much larger agglomerates (at low discharge currents). In mixed carbon-MnO2 nanorod cathodes, the use of PVDF initiates H2O formation that affects discharge products and an overall mechanism governing phase formation at MnO2 in sulfolane and anhydrous DMSO with and without PVDF binder is presented. This work highlights the importance of careful consideration of electrolyte-cathode material-discharge product interactions in the search for more stable Li-O2 systems. en
dc.description.sponsorship Irish Research Council (IRC New Foundations Award) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Royal Society of Chemistry (RSC) en
dc.relation.uri http://pubs.rsc.org/en/content/articlelanding/2015/cp/c4cp05785f#!divAbstract
dc.rights © the Owner Societies 2015 en
dc.subject Nanorods en
dc.subject Nanorod cathode en
dc.subject Li-O2 en
dc.subject Battery cathodes en
dc.subject Lithium-air batteries en
dc.subject Ether-based electrolytes en
dc.subject Li-air en
dc.subject Oxygen battery en
dc.subject High-capacity en
dc.subject Dimethyl-sulfoxide en
dc.subject Energy storage en
dc.subject Carbon Cathodes en
dc.title Electrochemical investigation of the role of MnO2 nanorod catalysts in water containing and anhydrous electrolytes for Li-O2 battery applications en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: c.odwyer@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2018-05-03T08:02:02Z
dc.description.version Accepted Version en
dc.internal.rssid 289878087
dc.contributor.funder Seventh Framework Programme en
dc.contributor.funder Irish Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Chemistry Chemical Physics en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress c.odwyer@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/FP7::SP1::NMP/314508/EU/STable high-capacity lithium-Air Batteries with Long cycle life for Electric cars/STABLE en

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