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Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials

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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