Gross, Toni ; Hess, Christian (2014):
Spatially-Resolved In Situ Raman Analysis of LiCoO2 Electrodes.
In: ECS Transactions, In: ECS transactions, 63 (1), pp. 137-144. [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 ; 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 |
| Journal 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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