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Influence of carbonate-based additives on the electrochemical performance of Si NW anodes cycled in an ionic liquid electrolyte

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dc.contributor.author Stokes, Killian
dc.contributor.author Kennedy, Tadhg
dc.contributor.author Kim, Guk-Tae
dc.contributor.author Geaney, Hugh
dc.contributor.author Storan, Dylan
dc.contributor.author Laffir, Fathima R.
dc.contributor.author Appetecchi, Giovanni Battista
dc.contributor.author Passerini, Stefano
dc.contributor.author Ryan, Kevin M.
dc.date.accessioned 2020-07-30T13:17:22Z
dc.date.issued 2020
dc.identifier.uri http://hdl.handle.net/10344/9063
dc.description peer-reviewed en_US
dc.description The full text of this article will not be available in ULIR until the embargo expires on the 10/07/2021
dc.description.abstract Addition of electrolyte additives (ethylene or vinylene carbonate) is shown to dramatically improve the cycling stability and capacity retention (1600 mAhg-1) of Si nanowires (NWs) in a safe ionic liquid (IL) electrolyte (0.1LiTFSI-0.6PYR13FSI-0.3PYR13TFSI) . We show using post-mortem SEM and TEM, a distinct difference in morphologies of the active material after cycling in the presence or absence of the additives. The difference in performance is shown by post-mortem XPS analysis to arise from a notable increase in irreversible silicate formation in the absence of the carbonate additives. The composition of the solid electrolyte interphase (SEI) formed at the active material surface was further analysed using XPS as a function of the IL components revealing that the SEI was primarily made up of N, F and S containing compounds from the degradation of the TFSI and FSI anions. en_US
dc.language.iso eng en_US
dc.publisher American Chemical Society en_US
dc.relation 16IA4629 en_US
dc.relation.ispartofseries Nano Letters;
dc.relation.uri https://doi.org/10.1021/acs.nanolett.0c01774
dc.rights © Year ACS This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.0c01774 en_US
dc.subject ionic liquid en_US
dc.subject electrolyte en_US
dc.subject silicon nanowires en_US
dc.subject SEI en_US
dc.subject ex-situ en_US
dc.title Influence of carbonate-based additives on the electrochemical performance of Si NW anodes cycled in an ionic liquid electrolyte en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1021/acs.nanolett.0c01774
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid 16/IA/4629 en_US
dc.relation.projectid 11-PI-1148 en_US
dc.relation.projectid 16/M-ERA/3419 en_US
dc.relation.projectid 814464 en_US
dc.date.embargoEndDate 2021-07-10
dc.embargo.terms 2021-07-10 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US


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