Using chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodes

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dc.contributor.authorTian, Ruiyuan
dc.contributor.authorKing, Paul J.
dc.contributor.authorCoelho, João
dc.contributor.authorPark, Sang-Hoon
dc.contributor.authorHorvath, Dominik V.
dc.contributor.authorNicolosi, Valeria
dc.contributor.authorO'Dwyer, Colm
dc.contributor.authorColeman, Jonathan N.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderNokiaen
dc.contributor.funderHorizon 2020en
dc.date.accessioned2020-07-27T14:22:41Z
dc.date.available2020-07-27T14:22:41Z
dc.date.issued2020-06-05
dc.date.updated2020-07-22T12:59:24Z
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.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid228220en
dc.identifier.citationTian, R., King, P. J., Coelho, J., Park, S.-H., Horvath, D. V., Nicolosi, V., O'Dwyer, C. and Coleman, J. N. (2020) 'Using chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodes', Journal of Power Sources, 468, 228220, (11 pp). doi: 10.1016/j.jpowsour.2020.228220en
dc.identifier.doi10.1016/j.jpowsour.2020.228220en
dc.identifier.endpage11en
dc.identifier.issn0378-7753
dc.identifier.journaltitleJournal of Power Sourcesen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/10312
dc.identifier.volume468en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Principal Investigator Programme (PI)/11/PI/1087/IE/2D atomic crystal-nanoconductor hybrids: High conductivity nano-structured materials for energy applications/en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::SGA-RIA/785219/EU/Graphene Flagship Core Project 2/GrapheneCore2en
dc.relation.projectinfo: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
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2581/IE/Diffractive optics and photonic probes for efficient mouldable 3D printed battery skin materials for portable electronic devices/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Technology and Innovation Development Award (TIDA)/15/TIDA/2893/IE/Advanced Battery Materials for High Volumetric Energy Density Li-ion Batteries for Remote Off-Grid Power/en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::RIA/825114/EU/Smart Autonomous Multi Modal Sensors for Vital Signs Monitoring/SmartVistaen
dc.relation.urihttps://www.sciencedirect.com/science/article/abs/pii/S0378775320305231
dc.rights© 2020 Elsevier B. V. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAccelerated testingen
dc.subjectFitting equationen
dc.subjectRate-performanceen
dc.titleUsing chronoamperometry to rapidly measure and quantitatively analyse rate-performance in battery electrodesen
dc.typeArticle (peer-reviewed)en
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