dc.contributor.author
Kulikov, Ilia
dc.contributor.author
Vereshchagin, Anatoliy A.
dc.contributor.author
Lukianov, Daniil A.
dc.contributor.author
Levin, Oleg V.
dc.contributor.author
Behrends, Jan
dc.date.accessioned
2024-02-06T09:22:47Z
dc.date.available
2024-02-06T09:22:47Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/42301
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-42026
dc.description.abstract
An electron spin echo in a nitroxide-containing polymer cathode film for organic radical batteries is observed for various states of charge at cryogenic temperatures. The EPR-detected state of charge (ESOC), as inferred from the number of paramagnetic centers in the film, is compared to the results of Coulomb counting based on galvanostatic charging. Spin concentration, longitudinal relaxation times T(1 )and phase memory times T-m strongly correlate with the ESOC. In the discharged film, the spin concentration reaches 5 +/- 3x10(20) cm(-3), causing a phase memory time T-m << 100 ns (shorter than the resonator ring-down time) that hinders the detection of the spin echo. In the charged film, the decreased spin concentration results in a longer T-m between 100 ns and 300 ns that enables spin-echo detection, yet limits the length of the microwave pulse sequence. The short, broad-band pulses cause instantaneous diffusion in the unoxidized domains across the oxidized film, affecting the relative peak intensities in the pulsed EPR spectrum. By simulating the spectral distortion caused by instantaneous diffusion, we obtain information on the local spin concentration, which complements the information on the 'bulk' spin concentration determined by electrochemistry and continuous-wave EPR spectroscopy.
en
dc.format.extent
7 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Electrochemistry
en
dc.subject
Instantaneous diffusion
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::541 Physikalische Chemie
dc.title
A nitroxide-containing cathode material for organic radical batteries studied with pulsed EPR spectroscopy
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
100134
dcterms.bibliographicCitation.doi
10.1016/j.jmro.2023.100134
dcterms.bibliographicCitation.journaltitle
Journal of Magnetic Resonance Open
dcterms.bibliographicCitation.volume
16-17
dcterms.bibliographicCitation.url
https://doi.org/10.1016/j.jmro.2023.100134
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2666-4410
refubium.resourceType.provider
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