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dc.contributor.authorRogstad, Daniel Tevik
dc.contributor.authorEinarsrud, Mari-Ann
dc.contributor.authorSvensson, Ann Mari
dc.date.accessioned2022-01-03T09:19:32Z
dc.date.available2022-01-03T09:19:32Z
dc.date.created2021-11-14T21:06:56Z
dc.date.issued2021
dc.identifier.issn0013-4651
dc.identifier.urihttps://hdl.handle.net/11250/2835738
dc.description.abstractIn this work, four selected ionic liquids (ILs), in combination with lithium bis(fluorosulfonyl)imide salt (LiFSI) were explored as electrolytes for anodes made from micron-sized metallurgical grade silicon. The ionic liquids were based on the cations; pyrrolidinium (PYR13), imidazolium (EMI) and phosphonium (P111i4) and the anions; bis(fluorosulfonyl)imide (FSI) and bis(trifluorosulfonyl)imide (TFSI). The cycling stability and rate performance were investigated in pseudo-full cells with silicon anode and commercial LiFePO4, and compared to a carbonate electrolyte. Electrolytes based on PYR13FSI and P111i4FSI exhibit a decent rate performance up to C/5 and showed stable cycling over ∼100 cycles, maintaining a reversible capacity of >1200 mAh gSi-1 at cycle 100 (C/5 rate) and over 2000 mAh gSi-1 at C/20. These electrolytes also had the best oxidation stability (> 5.3 V vs Li/Li). Based on assessment of the limiting current density in symmetrical cells, the Li-ion mobility was determined to be slightly higher for EMIFSI, but differences in Li-ion mobility cannot account for the differences in cycling stability among these electrolytes. While the SEI formed in EMIFSI electrolyte is the most conductive, the highest coulombic efficiency was obtained for PYR13FSI, indicating that the best passivating SEI was formed in this electrolyte.en_US
dc.language.isoengen_US
dc.publisherElectrochemical Societyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleEvaluation of selected ionic liquids as electrolytes for silicon anodes in li-ion batteriesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.volume168en_US
dc.source.journalJournal of the Electrochemical Societyen_US
dc.source.issue11en_US
dc.identifier.doi10.1149/1945-7111/ac330f
dc.identifier.cristin1954395
dc.description.localcode© 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/ by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
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