Chemical characterization of aging processes in high energy-density lithium-ion batteries
- Introduction Lithium-ion batteries (LIBs) are one key technology to overcome the climate crisis and energy transition challenges. Demands of electric vehicles on higher capacity and power drives research on innovative cathode and anode materials. These high energy-density LIBs are operated at higher voltages, leading to increased electrolyte decay and the current collectors' degradation. Even though this fundamental corrosion process significantly affects battery performance, insufficient research is being done on the aluminum current collector. Fast and convenient analytical methods are needed for monitoring the aging processes in LIBs. Methods In this work glow-discharge optical emission spectrometry (GD-OES) was used for depth profile analysis of aged cathode material. The measurements were performed in pulsed radio frequency mode. Under soft and controlled plasma conditions, high-resolution local determination (in depth) of the elemental composition is possible. ScanningIntroduction Lithium-ion batteries (LIBs) are one key technology to overcome the climate crisis and energy transition challenges. Demands of electric vehicles on higher capacity and power drives research on innovative cathode and anode materials. These high energy-density LIBs are operated at higher voltages, leading to increased electrolyte decay and the current collectors' degradation. Even though this fundamental corrosion process significantly affects battery performance, insufficient research is being done on the aluminum current collector. Fast and convenient analytical methods are needed for monitoring the aging processes in LIBs. Methods In this work glow-discharge optical emission spectrometry (GD-OES) was used for depth profile analysis of aged cathode material. The measurements were performed in pulsed radio frequency mode. Under soft and controlled plasma conditions, high-resolution local determination (in depth) of the elemental composition is possible. Scanning electron microscopy (SEM) combined with a focused ion beam (FIB) cutting and energy dispersive X-ray spectroscopy (EDX) was used to confirm GD-OES results and obtain additional information on elemental distribution. Results The aging of coin cells manufactured with different cathode materials (LCO, LMO, NMC111, NMC424, NMC532, NMC622, and NMC811) was studied. GD-OES depth profiling of new and aged cathode materials was performed. Quantitative analysis was possible through calibration with synthetic standards and correction by sputter rate. Different amounts of aluminum deposit on the cathode surface were found for different materials. The deposit has its origin in the corrosion of the aluminum current collector. The results are compatible with results from FIB-EDX. However, GD-OES is a faster and less laborious analytical method. Therefore, it will accelerate research on corrosion processes in high energy-density batteries. Innovative aspects - Quantitative depth profiling of cathode material -Monitoring of corrosion processes in high energy-density lithium-ion batteries - Systematic investigation of the influence of different cathode materials…
Autor*innen: | Alexander WinckelmannORCiD |
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Koautor*innen: | V. Hoffmann, Dalia Morcillo, Leonardo Agudo Jacome, Robert Leonhardt, Silke Richter, Sebastian Recknagel, Carlos Enrique Abad Andrade, Zengchao You |
Dokumenttyp: | Posterpräsentation |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2023 |
Organisationseinheit der BAM: | 1 Analytische Chemie; Referenzmaterialien |
1 Analytische Chemie; Referenzmaterialien / 1.6 Anorganische Referenzmaterialien | |
3 Gefahrgutumschließungen; Energiespeicher | |
3 Gefahrgutumschließungen; Energiespeicher / 3.1 Sicherheit von Gefahrgutverpackungen und Batterien | |
5 Werkstofftechnik | |
5 Werkstofftechnik / 5.1 Mikrostruktur Design und Degradation | |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Depth-profiling; GD-OES; Lithium Ion Batteries |
Themenfelder/Aktivitätsfelder der BAM: | Chemie und Prozesstechnik |
Chemie und Prozesstechnik / Chemische Charakterisierung und Spurenanalytik | |
Energie | |
Energie / Elektrische Energiespeicher und -umwandlung | |
Veranstaltung: | ANAKON 2023 |
Veranstaltungsort: | Vienna, Austria |
Beginndatum der Veranstaltung: | 11.04.2023 |
Enddatum der Veranstaltung: | 14.04.2023 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 17.10.2023 |
Referierte Publikation: | Nein |