The influence of carrier density and doping type on lithium insertion and extraction processes at silicon surfaces

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dc.contributor.author McSweeney, William
dc.contributor.author Lotty, Olan
dc.contributor.author Glynn, Colm
dc.contributor.author Geaney, Hugh
dc.contributor.author Holmes, Justin D.
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-05-15T14:44:04Z
dc.date.available 2018-05-15T14:44:04Z
dc.date.issued 2014-05-17
dc.identifier.citation McSweeney, W., Lotty, O., Glynn, C., Geaney, H., Holmes, J. D. and O’Dwyer, C. (2014) 'The influence of carrier density and doping type on lithium insertion and extraction processes at silicon surfaces', Electrochimica Acta, 135, pp. 356-367. doi: 10.1016/j.electacta.2014.05.035 en
dc.identifier.volume 135 en
dc.identifier.startpage 356 en
dc.identifier.endpage 367 en
dc.identifier.issn 0013-4686
dc.identifier.uri http://hdl.handle.net/10468/6115
dc.identifier.doi 10.1016/j.electacta.2014.05.035
dc.description.abstract The Li+ insertion and extraction characteristics at n-type and p-type Si(100) electrodes with different carrier density and doping type are investigated by cyclic voltammetry and constant current measurements. The insertion and extraction potentials are demonstrated to vary with cycling and the occurrence of an activation effect is shown in n-type electrodes where the charge capacity and voltammetric currents are found to be much higher than p-type electrodes. A rate-dependent redox process influenced by the surface region electronic density, which influences the magnitude of cyclic voltammetry current is found at Si(100) surface regions during Li insertion and extraction. At p-type Si(100) surface regions, a thin, uniform film forms at lower currents, while also showing a consistently high (>70%) Coulombic efficiency for Li extraction. The p-type Si(100) surface region does not undergo crack formation after deintercalation and the amorphization was demonstrated using transmission electron microscopy (TEM). X-ray photoelectron spectroscopy (XPS) and Raman scattering demonstrate that highly doped n-type Si(100) retains Li as a silicide and converts to an amorphous phase as a two-step phase conversion process. The findings show the succinct dependence of Li insertion and extraction processes for uniformly doped Si(100) single crystals and how the doping type and its effect on the semiconductor-solution interface dominate Li insertion and extraction, composition, crystallinity changes and charge capacity. en
dc.description.sponsorship Higher Education Authority (INSPIRE programme, funded by the Irish Government’s Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007-2013); Irish Research Council (Award No. RS/2011/797); University College Cork (UCC Strategic Research Fund); en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.uri http://www.sciencedirect.com/science/article/pii/S0013468614010196
dc.rights © 2014 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. en
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ en
dc.subject Silicon en
dc.subject Electrochemistry en
dc.subject Li-ion battery en
dc.subject Intercalation en
dc.title The influence of carrier density and doping type on lithium insertion and extraction processes at silicon surfaces 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 2018-05-03T11:17:43Z
dc.description.version Accepted Version en
dc.internal.rssid 257227432
dc.contributor.funder Higher Education Authority en
dc.contributor.funder Irish Research Council en
dc.contributor.funder University College Cork en
dc.contributor.funder Seventh Framework Programme en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Electrochimica Acta 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/SFI/SFI Stokes Professorship & Lectureship Programme/07/SK/B1232a/IE/Colm ODwyer/ en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Short Term Travel Fellowship (STTF)/07/SK/B1232a - STTF 11/IE/Optical Probing of Phase Changes in Inverse opal Photonic Crystal Li-on Battery Electrodes/ 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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© 2014 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. Except where otherwise noted, this item's license is described as © 2014 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
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