dc.identifier.uri |
http://dx.doi.org/10.15488/2261 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/2287 |
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dc.contributor.author |
Epp, Viktor
|
|
dc.contributor.author |
Brünig, Christian
|
|
dc.contributor.author |
Binnewies, Michael
|
|
dc.contributor.author |
Heitjans, Paul
|
|
dc.contributor.author |
Wilkening, Martin
|
|
dc.date.accessioned |
2017-11-10T18:14:24Z |
|
dc.date.available |
2017-11-10T18:14:24Z |
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dc.date.issued |
2012 |
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dc.identifier.citation |
Epp, V.; Brünig, C.; Binnewies, M.; Heitjans, P.; Wilkening, M.: Studying Li dynamics in a gas-phase synthesized amorphous oxide by NMR and impedance spectroscopy. In: Zeitschrift für Physikalische Chemie 226 (2012), S. 513-524. DOI: https://doi.org/10.1524/zpch.2012.0224 |
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dc.description.abstract |
Li diffusion parameters of a structurally disordered Li-Al-Si-oxide prepared by gas-phase synthesis were complementarily investigated by both time-domain NMR techniques and impedance spectroscopy. The first include 7Li NMR spin-lattice relaxation (SLR) measurements in the laboratory as well as in the rotating frame of reference. An analysis of variable-temperature NMR line widths point to an activation energy E a of approximately 0.6 eV. The value is confirmed by rotating-frame SLR NMR data recorded at approximately 11 kHz. Above room temperature the low-temperature flank of a diffusion-induced rate peak shows up which can be approximated by an Arrhenius law yielding E a = 0.56(1) eV. This is in very good agreement with the result obtained from 7Li spin-alignment echo (SAE) NMR being sensitive to even slower Li dynamics. For comparison, dc-conductivity measurements, probing long-range motions, yield E a = 0.8 eV. Interestingly, lowtemperature SAE NMR decay rates point to localized Li motions being characterized with a very small activation energy of only 0.09 eV. © by Oldenbourg Wissenschaftsverlag, München. |
eng |
dc.language.iso |
eng |
|
dc.publisher |
Berlin : Walter de Gruyter |
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dc.relation.ispartofseries |
Zeitschrift für Physikalische Chemie 226 (2012) |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
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dc.subject |
Impedance spectroscopy |
eng |
dc.subject |
Li diffusion |
eng |
dc.subject |
Non-stoichiometric compounds |
eng |
dc.subject |
Solid state NMR |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.subject.ddc |
530 | Physik
|
ger |
dc.title |
Studying Li dynamics in a gas-phase synthesized amorphous oxide by NMR and impedance spectroscopy |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.issn |
09429352 |
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dc.relation.doi |
https://doi.org/10.1524/zpch.2012.0224 |
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dc.bibliographicCitation.volume |
226 |
|
dc.bibliographicCitation.firstPage |
513 |
|
dc.bibliographicCitation.lastPage |
524 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
|