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Spatially-Resolved In Situ Raman Analysis of LiCoO2 Electrodes

Gross, Toni and Hess, Christian (2014):
Spatially-Resolved In Situ Raman Analysis of LiCoO2 Electrodes.
In: ECS transactions, pp. 137-144, 63, (1), [Online-Edition: http://dx.doi.org/10.1149/06112.0001ecst ],
[Article]

Abstract

The potential of Raman diagnostics for spatially-resolved in situ diagnostics of LiCoO2 electrodes for lithium-ion batteries is demonstrated. In situ Raman spectra of LiCoO2 composite electrodes are characterized by LiCoO2 phonon bands as well as carbon- and electrolyte-related features. Spatially-resolved Raman analysis, i.e. Raman mapping prior electrochemical cycling reveals a variation of chemical composition across the electrode surface. Comparison of in situ spectra prior and after electrochemical cycling shows a spatially-dependent redistribution of composition as derived from changes in the LiCoO2-carbon peak ratios. The results of the in situ mapping experiments are dicussed in the context of degradation of lithium-ion batteries.

Item Type: Article
Erschienen: 2014
Creators: Gross, Toni and Hess, Christian
Title: Spatially-Resolved In Situ Raman Analysis of LiCoO2 Electrodes
Language: English
Abstract:

The potential of Raman diagnostics for spatially-resolved in situ diagnostics of LiCoO2 electrodes for lithium-ion batteries is demonstrated. In situ Raman spectra of LiCoO2 composite electrodes are characterized by LiCoO2 phonon bands as well as carbon- and electrolyte-related features. Spatially-resolved Raman analysis, i.e. Raman mapping prior electrochemical cycling reveals a variation of chemical composition across the electrode surface. Comparison of in situ spectra prior and after electrochemical cycling shows a spatially-dependent redistribution of composition as derived from changes in the LiCoO2-carbon peak ratios. The results of the in situ mapping experiments are dicussed in the context of degradation of lithium-ion batteries.

Journal or Publication Title: ECS transactions
Title of Book: Characterization of Interfaces and Interphases
Series Name: ECS Transactions
Volume: 63
Number: 1
Divisions: 07 Department of Chemistry
07 Department of Chemistry > Physical Chemistry
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
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 > B - Characterisation > Subproject B8: In situ diagnostics of intercalation-batteries via Raman spectroscop
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 07 Aug 2014 13:19
Official URL: http://dx.doi.org/10.1149/06112.0001ecst
Additional Information:

SFB 595 B8

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