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Conducting polymer‐based hybrid electrochemical capacitor utilizing potassium iodide redox electrolyte with controlled self‐discharge

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dc.abstract.enThis paper reports on the application of poly (3,4-ethylenedioxythiophene)/carbon nanotubes (PEDOT/CNT) material for the construction of a hybrid supercapacitor utilizing iodide redox-active electrolyte. To address the advantages in terms of electrochemical performance, comparison has been made to the system using conventional activated carbon (AC) electrodes. Despite limited specific surface area, the PEDOT/CNT cell demonstrates reasonably high electrical parameters (vs. highly porous AC), especially those normalized per volume or total mass of the device. Interestingly, it also exhibits more stable self-discharge characteristics over operation time which shall be assigned to smaller fraction of free polyiodides generated in the cell in the presence of the low-surface-area polymer electrode, in addition to their strong confinement in the polymer network, thus supressing redox-shuttling. Pursuing the mechanistic studies, we have managed to detect (using the electrocatalytic WO3-based voltammetric probe) the presence of undesirable iodates but at lower concentrations in a case of the PEDOT/CNT-based capacitor.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorLubera, Justyna
dc.contributor.authorMroziewicz, Aleksandra A.
dc.contributor.authorSkunik-Nuckowska, Magdalena
dc.contributor.authorKulesza, Paweł
dc.contributor.authorRączka, Patryk
dc.contributor.authorDyjak, Sławomir
dc.date.accessioned2024-01-24T20:05:59Z
dc.date.available2024-01-24T20:05:59Z
dc.date.issued2022
dc.description.financePublikacja bezkosztowa
dc.description.number2
dc.description.volume9
dc.identifier.doi10.1002/CELC.202101222
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103518
dc.identifier.weblinkhttps://onlinelibrary.wiley.com/doi/pdf/10.1002/celc.202101222
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofChemElectroChem
dc.relation.pagese20210122
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enactivated carbon
dc.subject.enhybrid supercapacitor
dc.subject.enpotassium iodide
dc.subject.enpoly (3,4- ethylenedioxythiophene)
dc.subject.enself-discharge
dc.titleConducting polymer‐based hybrid electrochemical capacitor utilizing potassium iodide redox electrolyte with controlled self‐discharge
dc.typeJournalArticle
dspace.entity.typePublication