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dc.contributor.authorColeman, Jonathanen
dc.contributor.authorNicolosi, Valeriaen
dc.date.accessioned2020-09-28T20:07:22Z
dc.date.available2020-09-28T20:07:22Z
dc.date.issued2020en
dc.date.submitted2020en
dc.identifier.citationTian, R. and King, P.J. and Coelho, J. and Park, S.-H. and Horvath, D.V. and Nicolosi, V. and O'Dwyer, C. and Coleman, J.N., Using chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodes, Journal of Power Sources, 468, 228220, 2020en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/93610
dc.descriptionPUBLISHEDen
dc.descriptioncited By 0en
dc.description.abstractFor battery electrodes, measured capacity decays as charge/discharge current is increased. Such rate-performance is usually characterised via galvanostatic charge-discharge measurements, experiments which are very slow, limiting the speed at which rate experiments can be completed. This is particularly limiting during mechanistic studies where many rate measurements are needed. Building on work by Heubner at al., we demonstrate chronoamperometry (CA) as a fast method for measuring capacity-rate curves with hundreds of data points down to C-rates below 0.01C. While Heubner et al. reported equations to convert current transients to capacity vs. C-rate curves, we modify these equations to give capacity as a function of charge/discharge rate, R. We use these expressions to obtain simple equations which can accurately fit data for both capacity vs. C-rate and capacity vs. R at normal rates. Interestingly, at high-rates, the curves obtained from CA deviate from the normal behaviour showing a new, previously unobserved, decay feature. We associate this feature with the very early part of the current transient where electronic motion dominates the current. Using a simple model, we show that the dependence of the high-rate time constant on electrode thickness can be linked to electrode conductivity.en
dc.language.isoenen
dc.relation.ispartofseriesJournal of Power Sourcesen
dc.relation.ispartofseries468en
dc.relation.ispartofseries228220en
dc.rightsYen
dc.subjectRate-performanceen
dc.subjectAccelerated testingen
dc.subjectFitting-equationen
dc.titleUsing chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodesen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.contributor.sponsorEuropean Union (EU)en
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/colemajen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/nicoloven
dc.identifier.rssinternalid220270en
dc.identifier.doihttp://dx.doi.org/10.1016/j.jpowsour.2020.228220en
dc.relation.ecprojectidinfo:eu-repo/grantAgreement/EC/FP7/785219
dc.rights.ecaccessrightsopenAccess
dc.contributor.sponsorGrantNumberSFI/12/RC/2278en
dc.contributor.sponsorGrantNumber785219en
dc.contributor.sponsorGrantNumber13/TIDA/E2761en
dc.identifier.orcid_id0000-0001-9659-9721en


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