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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