Methods-Ampero-Coulometry: a new technique for understanding lithium-sulfur electrochemistry

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dc.contributor.authorGulzar, Umair
dc.contributor.authorLonergan, Alex
dc.contributor.authorEgorov, Vladimir
dc.contributor.authorZhang, Yan
dc.contributor.authorGrant, Alex
dc.contributor.authorCarroll, Aoife
dc.contributor.authorO'Dwyer, Colm
dc.contributor.funderIrish Research Councilen
dc.contributor.funderHorizon 2020en
dc.contributor.funderEuropean Regional Development Funden
dc.contributor.funderEnterprise Irelanden
dc.date.accessioned2023-03-08T15:45:07Z
dc.date.available2023-03-08T15:45:07Z
dc.date.issued2023-03
dc.date.updated2023-03-07T11:14:09Z
dc.description.abstractDespite limited commercial success, lithium sulfur technology (LST) is still far from competing existing Li-ion technology. One of the main reasons hindering the success of LST is the complexity of lithium-sulfur chemistry during electrochemical charging and discharging. Dissolution of sulfur species in the electrolyte solution exacerbates the difficulties of this system. Therefore, a comprehensive understanding of sulfur species and their kinetics during charge/discharge process is paramount for a high-performance lithium-sulfur battery. We present a new technique we refer to as Ampero-Coulometry, which takes the chronoamperometric (galvanostatic) charge-discharge curves and mathematically transforms them to a series of curves that reveal the cation diffusional rate inside carbon-sulfur porous electrodes at different states of charge/capacity. This technique allowed us to track the overall Li+ ion diffusional rate inside a Li-S cell over a complete state of discharge. As dissolution of sulfur species and their interplay inside a porous sulfur electrode has a significant role in limiting Li-S battery capacity, and method allows correlation between the known mechanism of polysulfide dissolution, the kinetics of a sulfur electrode, and its response.en
dc.description.sponsorshipIrish Research Council (Advanced Laureate Award IRCLA/2019/118), (Government of Ireland Postdoctoral Fellowship GOIPD/2021/438); European Regional Development Fund (Enterprise Ireland Commercialisation Fund, contract no. CF-2018–0839-P)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid030503en
dc.identifier.citationGulzar, U., Lonergan, A., Egorov, V., Zhang, Y., Grant, A., Carroll, A. and O’Dwyer, C. (2023) ‘Methods—ampero-coulometry: a new technique for understanding lithium-sulfur electrochemistry’, Journal of The Electrochemical Society, 170(3), 030503 (9pp). doi: 10.1149/1945-7111/acbca0en
dc.identifier.doi10.1149/1945-7111/acbca0en
dc.identifier.endpage9en
dc.identifier.issnn/a
dc.identifier.issued3en
dc.identifier.journaltitleJournal of the Electrochemical Societyen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/14293
dc.identifier.volume170en
dc.language.isoenen
dc.publisherIOP Scienceen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::RIA/825114/EU/Smart Autonomous Multi Modal Sensors for Vital Signs Monitoring/SmartVistaen
dc.relation.urihttps://iopscience.iop.org/article/10.1149/1945-7111/acbca0
dc.rights© 2023, 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
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectLithiumen
dc.subjectSulfuren
dc.subjectBatteryen
dc.subjectEnergy storageen
dc.subjectElectrochemistryen
dc.subjectMaterialsen
dc.titleMethods-Ampero-Coulometry: a new technique for understanding lithium-sulfur electrochemistryen
dc.typeArticle (peer-reviewed)en
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