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Rüther, Tom ; Hileman, Wesley ; Plett, Gregory L. ; Trimboli, M. Scott ; Danzer, Michael A.:
Demystifying the Distribution of Relaxation Times : A Simulation-Based Investigation into the Limits and Possibilities of Interpretation for Lithium-Ion Batteries.
In: Journal of the Electrochemical Society.
Bd. 171
(2024)
Heft 6
.
- 060508.
ISSN 1945-7111
DOI: https://doi.org/10.1149/1945-7111/ad4fe5
Abstract
Interpreting impedance spectra of electrochemical systems using the distribution of relaxation times analysis remains an incompletely solved task. This study carefully examines various challenges related to the interpretation of resulting distributions of relaxation times using a closed-form lumped Doyle-Fuller-Newman model. First, the physical and phenomenological interpretation of peaks in the distribution of relaxation times are analyzed through a global sensitivity analysis. Second, the assignment of processes to specific ranges of time constants is investigated. Third, the use of half cells for the characterization of full cells is examined, and the clear limitations associated with the use of lithium metal counter electrodes are pointed out. Furthermore, the study provides first insights into the effects of distributed processes such as charge transfer, double-layer effects, and solid-state diffusion. Several prevailing interpretations in the literature are challenged and new insights and guidelines for interpreting distributions of relaxation times are offered.
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| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Elektrische Energiesysteme Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Elektrische Energiesysteme > Lehrstuhl Elektrische Energiesysteme - Univ.-Prof. Dr. Michael Danzer Forschungseinrichtungen Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayerisches Zentrum für Batterietechnik - BayBatt |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 12 Jun 2024 09:15 |
| Letzte Änderung: | 12 Jun 2024 09:15 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/89740 |