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Heinrich, Marco ; Wolff, Nicolas ; Harting, Nina ; Laue, Vincent ; Röder, Fridolin ; Seitz, Steffen ; Krewer, Ulrike:
Physico‐Chemical Modeling of a Lithium‐Ion Battery : An Ageing Study with Electrochemical Impedance Spectroscopy.
In: Batteries & Supercaps.
Bd. 2
(2019)
Heft 6
.
- S. 530-540.
ISSN 2566-6223
DOI: https://doi.org/10.1002/batt.201900011
Abstract
Electrochemical Impedance Spectroscopy measurements and simulations are performed on a nickel manganese cobalt oxide (NMC)/graphite pouch cell. A physico‐chemical continuum battery model is extended by a physical ageing model including a Solid Electrolyte Interphase. The model assumes a loss of electrochemically active surface area at anode and cathode as well as a growth of solid electrolyte interphase (SEI) layer thickness. These ageing parameters have been adjusted with an algorithm to achieve agreement between simulated and measured spectra. The results for a 28 mAh pouch cell show that the ageing model is suitable to correlate the change of the impedance spectrum with the degree of degradation of the cell. In detail, SEI thickness is shown to increase by 45 nm, while the anode and cathode loose 20 % and 57 % of their electrochemically active surface area, respectively. In addition, deviating measurement conditions and the end of life of the cell can be indicated by the parameter identification algorithm. Furthermore, it is demonstrated, that the change of the high and low frequency semicircles can be assigned to the anode SEI and cathode respectively.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften > Juniorprofessur Methoden des Batteriemonitoring und -managements > Juniorprofessur Methoden des Batteriemonitoring und -managements - Juniorprof. Dr.-Ing. Fridolin Röder Fakultäten > Fakultät für Ingenieurwissenschaften > Juniorprofessur Methoden des Batteriemonitoring und -managements |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 20 Nov 2020 07:27 |
| Letzte Änderung: | 30 Mär 2022 10:02 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/59648 |