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Novel local fluctuation-preserving upscaling techniques for heterogeneous reaction-transport equation in porous media

Traskunov, Igor und Latz, Arnulf (2022) Novel local fluctuation-preserving upscaling techniques for heterogeneous reaction-transport equation in porous media. Electrochimica Acta, 434 (1), Seite 141248. Elsevier. doi: 10.1016/j.electacta.2022.141248. ISSN 0013-4686.

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Offizielle URL: https://www.sciencedirect.com/science/article/abs/pii/S0013468622014050

Kurzfassung

A body of research in the field of lithium-ion batteries is dedicated to the investigation of the influence on their behavior by the complex microstructure of their porous electrodes. Experimental and numerical studies reported the distinctly localized spatial fluctuations of overpotential and lithium ion concentration which are not observed in the simulation results based on a widely used lithium-ion cell’s DFN (Doyle-Fuller-Newman) model. Using a combination of perturbation technique and asymptotic analysis, we rigorously derived the analytical results that explain the fluctuation dynamics that was reported earlier in the microstructure-resolving simulations; importantly, it was theoretically demonstrated that the localized fluctuations generally do not disappear in the homogenization limit which is usually used to justify the use of DFN. We reported new numerical results that proves that the approximations made in our theoretical analysis are indeed applicable to the physical and chemical parameters corresponding to the real lithium-ion cells. Our ansatz may be of use for accurate derivation of DFN-like electrochemistry mathematical models beyond the narrow scope of this report, in particular for the models that accurately account for the cell degradation processes which are sensitive to the particle-scale local environment in the electrode.

elib-URL des Eintrags:https://elib.dlr.de/192089/
Dokumentart:Zeitschriftenbeitrag
Titel:Novel local fluctuation-preserving upscaling techniques for heterogeneous reaction-transport equation in porous media
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Traskunov, IgorIgor.Traskunov (at) dlr.dehttps://orcid.org/0000-0002-0320-2607NICHT SPEZIFIZIERT
Latz, Arnulfarnulf.latz (at) dlr.dehttps://orcid.org/0000-0003-1449-8172NICHT SPEZIFIZIERT
Datum:28 September 2022
Erschienen in:Electrochimica Acta
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:434
DOI:10.1016/j.electacta.2022.141248
Seitenbereich:Seite 141248
Verlag:Elsevier
ISSN:0013-4686
Status:veröffentlicht
Stichwörter:Lithium-ion batteryMicrostructureHomogenizationBattery degradationAsymptotic analysisPerturbation methods
HGF - Forschungsbereich:Energie
HGF - Programm:Materialien und Technologien für die Energiewende
HGF - Programmthema:Elektrochemische Energiespeicherung
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SP - Energiespeicher
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Speicher
Standort: Ulm
Institute & Einrichtungen:Institut für Technische Thermodynamik > Computergestützte Elektrochemie
Hinterlegt von: Danner, Timo
Hinterlegt am:15 Dez 2022 11:20
Letzte Änderung:01 Okt 2024 03:00

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