Pseudocapacitive charge storage at nanoscale silicon electrodes

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dc.contributor.author McSweeney, William
dc.contributor.author Geaney, Hugh
dc.contributor.author Glynn, Colm
dc.contributor.author McNulty, David
dc.contributor.author O'Dwyer, Colm
dc.date.accessioned 2018-07-16T15:47:26Z
dc.date.available 2018-07-16T15:47:26Z
dc.date.issued 2015-05
dc.identifier.citation McSweeney, W., Geaney, H., Glynn, C., McNulty, D. and O'Dwyer, C. (2015) 'Pseudocapacitive Charge Storage at Nanoscale Silicon Electrodes', ECS Transactions, 66(6), pp. 39-48. doi: 10.1149/06606.0039ecst en
dc.identifier.volume 66 en
dc.identifier.issued 6 en
dc.identifier.startpage 39 en
dc.identifier.endpage 48 en
dc.identifier.issn 1938-5862
dc.identifier.uri http://hdl.handle.net/10468/6461
dc.identifier.doi 10.1149/06606.0039ecst
dc.description.abstract Pseudocapacitive behaviour can be accessed when Si nanowire (NW) electrodes are scanned at relatively fast potential scan rates in Li-ion battery electrolytes. Measurements using cyclic voltammetry supported by electron microscopy confirm that Si NWs formed on silicon substrates, as opposed to metallic current collectors, do not solely undergo alloying reactions. The influence of doping type, carrier concentration and bias condition during voltammetric polarization significantly alters the mechanism of electrochemical energy storage. The formation of a carrier depleted (electrically dead) layer of n-type NWs on silicon current collector electrodes limits insertion or alloying processes and rates that ordinarily form Li-Si phases, and charge is also stored within the electric double layer via pseudocapacitive processes. P-type NWs with solid crystalline cores also exhibit pseudocapacitive charge storage without structural modification of the NWs. en
dc.description.sponsorship Higher Education Authority (under the framework of the 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); en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Electrochemical Society en
dc.relation.uri http://ecst.ecsdl.org/content/66/6/39.abstract
dc.rights © 2015 ECS - The Electrochemical Society en
dc.subject Silicon en
dc.subject Electric double layer en
dc.subject Electrochemical energy storage en
dc.subject Li-ion battery electrolytes en
dc.subject Potential scan rates en
dc.subject Silicon electrode en
dc.subject Silicon substrates en
dc.subject Solid crystalline en
dc.subject Structural modifications en
dc.subject Alloying en
dc.subject Carrier concentration en
dc.subject Cyclic voltammetry en
dc.subject Electric current collectors en
dc.subject Electrodes en
dc.subject Lithium-ion batteries en
dc.subject Nanowires en
dc.subject Semiconductor doping en
dc.title Pseudocapacitive charge storage at nanoscale silicon electrodes 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 2018-06-11T21:24:00Z
dc.description.version Accepted Version en
dc.internal.rssid 302464864
dc.contributor.funder Higher Education Authority en
dc.contributor.funder Irish Research Council en
dc.contributor.funder Seventh Framework Programme en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ECS Transactions 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
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/13/TIDA/E2761/IE/LiONSKIN - Moldable Li-ion battery outer skin for electronic devices/ en


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