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Ultramicroelectrode Based Approaches to Diagnose Utility of Redox Electrolytes in Flow Batteries

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dc.abstract.enThe proposed redox electrolyte system, concentrated solutions of Keggin type silicotungstic acid (H4SiW12O40), have been tested using the microelectrode methodology to determine mass-transport (effectively diffusional) coefficients for charge propagation and homogeneous (electron self-exchange) rates of electron transfers. Silicotungstic acid (H4SiW12O40) acts as proton conductors, and undergoes fast, reversible, multi-electron electron transfers leading to the formation of highly conducting, mixed-valence (tungsten(VI,V) heteropoly blue) compounds. To develop useful electroanalytical diagnostic criteria, electroanalytical approaches utilizing ultramicrodisk electrodes have been adapted to characterization of redox electrolytes. Combination of two parallel ultramicroelectrode-based experiments performed under radial (long-term experiment; e.g., slow scan rate) and linear (short-term experiment; e.g., fast scan rate) diffusion conditions permits determination of both effective concentration of redox centers and transport (diffusion) coefficient parameters, which are crucial to evaluation of the utility of a redox electrolyte for charge storage.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNoto, Vito Di
dc.contributor.authorNegro, Enrico
dc.contributor.authorVezzu, Keti
dc.contributor.authorJaniszewska, Claudia
dc.contributor.authorRutkowska, Iwona
dc.contributor.authorKulesza, Paweł
dc.date.accessioned2024-01-26T11:18:12Z
dc.date.available2024-01-26T11:18:12Z
dc.date.issued2022
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.volume109
dc.identifier.doi10.1149/10903.0121ECST
dc.identifier.issn1938-5862
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/124099
dc.identifier.weblinkhttps://iopscience.iop.org/article/10.1149/10903.0121ecst
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofECS Transactions
dc.relation.pages121-129
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleUltramicroelectrode Based Approaches to Diagnose Utility of Redox Electrolytes in Flow Batteries
dc.typeJournalArticle
dspace.entity.typePublication