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Lenze, Georg ; Röder, Fridolin ; Bockholt, Henrike ; Haselrieder, Wolfgang ; Kwade, Arno ; Krewer, Ulrike:
Simulation-Supported Analysis of Calendering Impacts on the Performance of Lithium-Ion-Batteries.
In: Journal of the Electrochemical Society.
Bd. 164
(2017)
Heft 6
.
- A1223-A1233.
ISSN 1945-7111
DOI: https://doi.org/10.1149/2.1141706jes
Abstract
A combination of experimental and model based analysis was performed to investigate calendering impacts on the performance of lithium-ion-batteries. When discharging, not only geometric parameters, such as electrode thicknesses and porosities are affecting performance. Calendering also impacts on other parameters, such as the effective ionic conductivity within the electrolyte, the effective electronic conductivity of solid active material and the effective solid-liquid interfacial area. The simulation supported method is shown to complement experimental analysis to understand correlations between calendering and these parameters; it enables to identify cell internal parameters which are hard to measure and to analyze how the lithium transport is affected. In experiments, cells containing non-calendered cathodes performed significantly worse than ones with 22%-calendered cathodes. Simulation indicated that this losses consist mainly of a deterioration of effective electronic conductivity leading to overpotentials close to the separator. Minor contributions to the losses in non-calendered cathodes caused by the geometric compaction and a reduction of effective solid-liquid interfacial area were found as well, whereas the impact of effective ionic conductivity turned out to be only insignificantly small.
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 08:16 |
| Letzte Änderung: | 26 Jul 2022 09:44 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/59661 |