On the use of gas diffusion layers as current collectors in Li-O2 batteries

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dc.contributor.author Geaney, Hugh
dc.contributor.author O'Connell, John
dc.contributor.author Holmes, Justin D.
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-05-11T14:17:05Z
dc.date.available 2018-05-11T14:17:05Z
dc.date.issued 2014-09-03
dc.identifier.citation Geaney, H., O'Connell, J., Holmes, J. D. and O'Dwyer, C. (2014) 'On the Use of Gas Diffusion Layers as Current Collectors in Li-O2 Battery Cathodes', Journal of The Electrochemical Society, 161(14), pp. A1964-A1968. doi:10.1149/2.0021414jes en
dc.identifier.volume 161 en
dc.identifier.issued 14 en
dc.identifier.startpage A1964 en
dc.identifier.endpage A1968 en
dc.identifier.issn 0013-4651
dc.identifier.uri http://hdl.handle.net/10468/6089
dc.identifier.doi 10.1149/2.0021414jes
dc.description.abstract We investigate the impact of using a carbon based gas diffusion layer (GDL) as the current collector for Li-O2 batteries. It is shown that the GDL actively participates in ORR during discharge conditions and, if its mass is not accounted for, can lead to inflated discharge capacity figures compared to inert cathode supports. SEM and XRD analyses show that Li2O2 discharge products form on cathodes composed of as-received GDL in a similar manner to that observed for carbon on stainless steel (SS) current collectors (at applied currents of 100 μA cm−2 or less). The relative activity of the GDL, carbon on GDL and carbon-on-stainless steel current collectors from voltammetric measurements confirmed ORR and OER processes to be similar at all carbon-based surfaces. When heated above 300°C, degradation of the binder in the GDL and associated loss of carbon from the substrate surface leads to reduced discharge times compared to the pristine GDL substrates. The data highlight the importance of the contribution to ORR/OER in carbon-based active current collector substrates when determining gravimetric capacities of Li-O2 batteries. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher The Electrochemical Society en
dc.relation.uri http://jes.ecsdl.org/content/161/14/A1964.full.pdf+html
dc.rights © 2014 The Electrochemical Society. en
dc.subject Stainless steel en
dc.subject Carbon en
dc.subject Cathodes en
dc.subject Diamond films en
dc.subject Diffusion in gases en
dc.subject Electric batteries en
dc.subject Electric current collectors en
dc.subject Electrodes en
dc.subject Lithium en
dc.subject Lithium batteries en
dc.subject Substrates en
dc.title On the use of gas diffusion layers as current collectors in Li-O2 batteries 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 2018-05-03T10:39:24Z
dc.description.version Accepted Version en
dc.internal.rssid 272119812
dc.contributor.funder Seventh Framework Programme en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of the Electrochemical Society 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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