Heber, Marcel ; Hofmann, Kathrin ; Hess, Christian (2022)
Raman Diagnostics of Cathode Materials for Li-Ion Batteries Using Multi-Wavelength Excitation.
In: Batteries, 2022, 8 (2)
doi: 10.26083/tuprints-00021214
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
Lithium-ion batteries have been commonly employed as power sources in portable devices and are of great interest for large-scale energy storage. To further enhance the fundamental understanding of the electrode structure, we report on the use of multi-wavelength Raman spectroscopy for the detailed characterization of layered cathode materials for Li-ion batteries (LiCoO₂, LiNixCo₁₋xO₂, LiNi1/₃Mn₁/₃Co₁/₃O₂). Varying the laser excitation from the UV to the visible (257, 385, 515, 633 nm) reveals wavelength-dependent changes in the vibrational profile and overtone/combination bands, originating from resonance effects in LiCoO₂. In mixed oxides, the influence of resonance effects on the vibrational profile is preserved but mitigated by the presence of Ni and/or Mn, highlighting the influence of resonance Raman spectroscopy on electronic structure changes. The use of UV laser excitation (257, 385 nm) is shown to lead to a higher scattering efficiency towards Ni in LiNi₁/₃Mn₁/₃Co₁/₃O₂ compared to visible wavelengths, while deep UV excitation at 257 nm allows for the sensitive detection of surface species and/or precursor species reminiscent of the synthesis. Our results demonstrate the potential of multi-wavelength Raman spectroscopy for the detailed characterization of cathode materials for lithium-ion batteries, including phase/impurity identification and quantification, as well as electronic structure analysis.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Heber, Marcel ; Hofmann, Kathrin ; Hess, Christian |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Raman Diagnostics of Cathode Materials for Li-Ion Batteries Using Multi-Wavelength Excitation |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Batteries |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 2 |
| Kollation: | 12 Seiten |
| DOI: | 10.26083/tuprints-00021214 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/21214 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): | Lithium-ion batteries have been commonly employed as power sources in portable devices and are of great interest for large-scale energy storage. To further enhance the fundamental understanding of the electrode structure, we report on the use of multi-wavelength Raman spectroscopy for the detailed characterization of layered cathode materials for Li-ion batteries (LiCoO₂, LiNixCo₁₋xO₂, LiNi1/₃Mn₁/₃Co₁/₃O₂). Varying the laser excitation from the UV to the visible (257, 385, 515, 633 nm) reveals wavelength-dependent changes in the vibrational profile and overtone/combination bands, originating from resonance effects in LiCoO₂. In mixed oxides, the influence of resonance effects on the vibrational profile is preserved but mitigated by the presence of Ni and/or Mn, highlighting the influence of resonance Raman spectroscopy on electronic structure changes. The use of UV laser excitation (257, 385 nm) is shown to lead to a higher scattering efficiency towards Ni in LiNi₁/₃Mn₁/₃Co₁/₃O₂ compared to visible wavelengths, while deep UV excitation at 257 nm allows for the sensitive detection of surface species and/or precursor species reminiscent of the synthesis. Our results demonstrate the potential of multi-wavelength Raman spectroscopy for the detailed characterization of cathode materials for lithium-ion batteries, including phase/impurity identification and quantification, as well as electronic structure analysis. |
| Freie Schlagworte: | lithium-ion batteries; cathode; LiCoO₂; NMC; resonance Raman spectroscopy; multiwavelength excitation; UV Raman spectroscopy |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-212149 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 500 Naturwissenschaften und Mathematik > 540 Chemie 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 24 Aug 2022 12:15 |
| Letzte Änderung: | 25 Aug 2022 06:24 |
| PPN: | 490346588 |
| Zugehörige Links: | |
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| Suche nach Titel in: | TUfind oder in Google |
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