Tuning electrode and separator sizes for enhanced performance of electrical double‐layer capacitors

dc.contributor.authorPaolini, Daniele
dc.contributor.authorAntony, Lintymol
dc.contributor.authorSeeta Rama Raju, Ganji
dc.contributor.authorKuzmak, Andrij
dc.contributor.authorVerkholyak, Taras
dc.contributor.authorKondrat, Svyatoslav
dc.date.accessioned2024-10-18T15:08:07Z
dc.date.available2024-10-18T15:08:07Z
dc.date.issued2024de
dc.date.updated2024-10-15T20:53:41Z
dc.description.abstractAn electrical double‐layer capacitor (EDLC) comprises two porous electrodes sandwiching an electrolyte‐permeable separator, which prevents the electrodes from short‐circuiting. While previous studies have mainly focused on electrolyte and electrode properties of EDLCs, the device configuration in terms of electrode and separator sizes received less attention, with separators often simplistically modelled as infinitely large reservoirs of ions. Herein, we investigate how the relationship between electrode and separator thicknesses impacts EDLC charging. We find that the assumption of bulk reservoir holds only under specific conditions. Moreover, we identify a tradeoff between stored energy density and pressure variations within the separator, potentially jeopardizing the EDLC durability. We also explore the influence of ionic liquid additives on EDLC charging. While prior research has shown that trace amounts of uncharged additives with strong electrode affinity can significantly enhance energy storage, we observe this effect as negligible for electrodes and separators of comparable sizes. Instead, we show how to optimize EDLC performance by fine‐tuning the concentration of additives and separator‐to‐electrode size ratio to maximize stored energy density.en
dc.description.sponsorshipPolish National Science Centre (NCN)de
dc.identifier.issn2196-0216
dc.identifier.other1906496404
dc.identifier.urihttp://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-151082de
dc.identifier.urihttp://elib.uni-stuttgart.de/handle/11682/15108
dc.identifier.urihttp://dx.doi.org/10.18419/opus-15089
dc.language.isoende
dc.relation.uridoi:10.1002/celc.202400218de
dc.rightsinfo:eu-repo/semantics/openAccessde
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/de
dc.subject.ddc530de
dc.subject.ddc620de
dc.titleTuning electrode and separator sizes for enhanced performance of electrical double‐layer capacitorsen
dc.typearticlede
ubs.fakultaetMathematik und Physikde
ubs.fakultaetFakultätsübergreifend / Sonstige Einrichtungde
ubs.institutInstitut für Computerphysikde
ubs.institutFakultätsübergreifend / Sonstige Einrichtungde
ubs.publikation.seiten9de
ubs.publikation.sourceChemElectroChem 11 (2024), No. e202400218de
ubs.publikation.typZeitschriftenartikelde

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