Gross, Toni André ; Hess, Christian (2014)
Raman diagnostics of LiCoO2 electrodes for lithium-ion batteries.
In: Journal of Power Sources, 256
doi: 10.1016/j.jpowsour.2014.01.084
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
LiCoO2 based electrode materials were characterized in detail using visible Raman spectroscopy. The studied materials comprise the active LiCoO2 material itself as well as electrochemically relevant composites of LiCoO2 with binder and conductive additives. Spatially resolved analysis, i.e. mapping of LiCoO2 composite electrodes reveals a significant variation of chemical composition across the electrode surface. Based on wavelength-dependent studies we demonstrate the presence of a resonance enhancement for LiCoO2 materials for green laser excitation allowing for in situ studies on the LiCoO2-based electrodes during lithium de-intercalation. During in situ experiments no significant structural changes occur consistent with the fact that visible Raman spectroscopy probes mainly the surface region of the LiCoO2 composite electrode. Our results demonstrate the potential of Raman spectroscopy for spatially resolved and in situ analysis of lithium-ion batteries.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Gross, Toni André ; Hess, Christian |
| Art des Eintrags: | Bibliographie |
| Titel: | Raman diagnostics of LiCoO2 electrodes for lithium-ion batteries |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Juni 2014 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Power Sources |
| Jahrgang/Volume einer Zeitschrift: | 256 |
| DOI: | 10.1016/j.jpowsour.2014.01.084 |
| Kurzbeschreibung (Abstract): | LiCoO2 based electrode materials were characterized in detail using visible Raman spectroscopy. The studied materials comprise the active LiCoO2 material itself as well as electrochemically relevant composites of LiCoO2 with binder and conductive additives. Spatially resolved analysis, i.e. mapping of LiCoO2 composite electrodes reveals a significant variation of chemical composition across the electrode surface. Based on wavelength-dependent studies we demonstrate the presence of a resonance enhancement for LiCoO2 materials for green laser excitation allowing for in situ studies on the LiCoO2-based electrodes during lithium de-intercalation. During in situ experiments no significant structural changes occur consistent with the fact that visible Raman spectroscopy probes mainly the surface region of the LiCoO2 composite electrode. Our results demonstrate the potential of Raman spectroscopy for spatially resolved and in situ analysis of lithium-ion batteries. |
| Freie Schlagworte: | Lithium-ion batteries; LiCoO2; In situ Raman spectroscopy; Spatially-resolved analysis; Resonance Raman |
| Zusätzliche Informationen: | SFB 595 B8 |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B8: In situ Diagnostik von Interkalationsbatterien mittels Ramanspektroskopie DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung 07 Fachbereich Chemie Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 28 Apr 2014 10:58 |
| Letzte Änderung: | 12 Mär 2015 10:09 |
| PPN: | |
| Sponsoren: | This work was supported by SFB595 of the Deutsche Forschungsgemeinschaft (DFG). The authors thank Lars Giebeler and Julia Eigenseer for help with some of the Raman experiments and Karl Kopp for technical support. We like to thank Wolfgang Donner for the o |
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