Oswald, S. ; Nikolowski, Kristian ; Ehrenberg, Helmut (2009)
Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials.
In: Analytical and Bioanalytical Chemistry, 393 (8)
doi: 10.1007/s00216-008-2520-z
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
New concepts for Li-ion batteries are of growing interest for high-performance applications. One aim is the search for new electrode materials with superior properties and their detailed characterization. We demonstrate the application of X-ray photoelectron spectroscopy (XPS) to investigate electrode materials (LiCoO2, LiCrMnO4) during electrochemical cycling. The optimization of a “quasi in situ” analysis, by transferring the samples with a transport chamber from the glove box to the XPS chamber, and the reliability of the experiments performed are shown. The behavior of characteristic chemical species at the electrodes and the changes in oxidation states of LiCrMnO4 during cycling is discussed. The formation of Cr6+ is suspected as a possible reason for irreversible capacity loss during charging up to complete Li deintercalation (approximately 5.2 V).
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2009 |
| Autor(en): | Oswald, S. ; Nikolowski, Kristian ; Ehrenberg, Helmut |
| Art des Eintrags: | Bibliographie |
| Titel: | Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials |
| Sprache: | Englisch |
| Publikationsjahr: | April 2009 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Analytical and Bioanalytical Chemistry |
| Jahrgang/Volume einer Zeitschrift: | 393 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1007/s00216-008-2520-z |
| Kurzbeschreibung (Abstract): | New concepts for Li-ion batteries are of growing interest for high-performance applications. One aim is the search for new electrode materials with superior properties and their detailed characterization. We demonstrate the application of X-ray photoelectron spectroscopy (XPS) to investigate electrode materials (LiCoO2, LiCrMnO4) during electrochemical cycling. The optimization of a “quasi in situ” analysis, by transferring the samples with a transport chamber from the glove box to the XPS chamber, and the reliability of the experiments performed are shown. The behavior of characteristic chemical species at the electrodes and the changes in oxidation states of LiCrMnO4 during cycling is discussed. The formation of Cr6+ is suspected as a possible reason for irreversible capacity loss during charging up to complete Li deintercalation (approximately 5.2 V). |
| Freie Schlagworte: | X-ray photoelectron spectroscopy - Interface/surface analysis - Ion chromatography/ion exchange - Li-ion batteries |
| Zusätzliche Informationen: | SFB 595 B4 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B4: In situ Untersuchungen der Degradation von Interkalationsbatterien und deren Modellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 15 Aug 2011 09:48 |
| Letzte Änderung: | 05 Mär 2013 09:51 |
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