Comparative operando XPS and SEM spatiotemporal potential mapping of ionic liquid polarization in a coplanar electrochemical device

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buir.contributor.authorSuzer, Sefik
dc.citation.epage13273en_US
dc.citation.issueNumber39en_US
dc.citation.spage13268en_US
dc.citation.volumeNumber93en_US
dc.contributor.authorSuzer, Sefik
dc.contributor.authorStrelcov, E.
dc.contributor.authorKolmakov, A.
dc.date.accessioned2022-02-18T10:55:10Z
dc.date.available2022-02-18T10:55:10Z
dc.date.issued2021-09-21
dc.departmentDepartment of Chemistryen_US
dc.description.abstractThe polarization response of a coplanar electrochemical capacitor covered with an ionic liquid as the electrolyte has been examined using a combination of two powerful analytic techniques, X-ray photoelectron spectroscopy (XPS) and scanning electron microcopy (SEM). Spatiotemporal distribution of the ionic liquid surface potential, upon DC or AC (square wave) biasing, has been monitored via chemical element binding energy shifts using XPS and secondary electron intensity variations using SEM. SEM’s high spatial resolution and speedy imaging together with application of a data mining algorithm made mapping of the surface potential distribution across the capacitor possible. Interestingly, despite the differences in the detection principles, both techniques yield similar polarization relaxation time constants. The results demonstrate the power of a synergistic combination of the two techniques with complementary capabilities and pave the way to a deeper understanding of liquid/solid interfaces and for performance evaluation and diagnostics of electrochemical devices.en_US
dc.identifier.doi10.1021/acs.analchem.1c02779en_US
dc.identifier.eissn1520-6882
dc.identifier.issn0003-2700
dc.identifier.urihttp://hdl.handle.net/11693/77503
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1021/acs.analchem.1c02779en_US
dc.source.titleAnalytical Chemistryen_US
dc.subjectCapacitorsen_US
dc.subjectDiffusionen_US
dc.subjectElectrodesen_US
dc.subjectPolarization,en_US
dc.subjectX-ray photoelectron spectroscopyen_US
dc.titleComparative operando XPS and SEM spatiotemporal potential mapping of ionic liquid polarization in a coplanar electrochemical deviceen_US
dc.typeArticleen_US

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