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

Oswald, S. and Nikolowski, Kristian and Ehrenberg, Helmut (2009):
Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials.
In: Analytical and Bioanalytical Chemistry, pp. 1871-1877, 393, (8), ISSN 1618-2642,
[Online-Edition: http://dx.doi.org/10.1007/s00216-008-2520-z],
[Article]

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).

Item Type: Article
Erschienen: 2009
Creators: Oswald, S. and Nikolowski, Kristian and Ehrenberg, Helmut
Title: Quasi in situ XPS investigations on intercalation mechanisms in Li-ion battery materials
Language: English
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).

Journal or Publication Title: Analytical and Bioanalytical Chemistry
Volume: 393
Number: 8
Uncontrolled Keywords: X-ray photoelectron spectroscopy - Interface/surface analysis - Ion chromatography/ion exchange - Li-ion batteries
Divisions: DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B4: In situ investigations of the degradation of intercalation batteries and their modelling
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 15 Aug 2011 09:48
Official URL: http://dx.doi.org/10.1007/s00216-008-2520-z
Additional Information:

SFB 595 B4

Identification Number: doi:10.1007/s00216-008-2520-z
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