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New Reduced-Order Lithium-Ion Battery Model to Account for the Local Fluctuations in the Porous Electrodes

Traskunov, Igor and Latz, Arnulf (2020) New Reduced-Order Lithium-Ion Battery Model to Account for the Local Fluctuations in the Porous Electrodes. Energy Technology. Wiley. doi: 10.1002/ente.202000861. ISSN 2194-4288.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/ente.202000861


Numerical simulations of microscopic transport processes in porous electrodes of lithium‐ion batteries demonstrated presence of spatially localized fluctuations of physical quantities on the microstructure scale that can potentially influence the macroscopic battery characteristics (for example, the degradation rates). These fluctuations can not be captured in a straightforward manner by the widely used cell models based on the porous electrode theory by Newman and coworkers (DFN models). The latter treat the porous electrodes as macroscopically homogeneous composite materials and dramatically reduce the computational costs of battery numerical simulation. In this paper, we propose a modification of DFN model that incorporates the local fluctuations but preserves the computational efficiency. A numerical simulation example is presented that is specifically designed to test the accuracy of the reproduction of the local fluctuations. The main new feature lies in the mathematical representation of the slow transport processes in the active material and their influence on the macroscopic reaction rates. The assumptions used to justify the model originate in the rigorous mathematical analysis of the transition from a microscopic, microstructure‐resolving transport and reaction description to a macroscopic, volume averaging‐based one. The model construction methodology is open for further modifications for the applications in which some of the assumptions should be dropped or description of new processes, reactions, phases, etc. should be incorporated.

Item URL in elib:https://elib.dlr.de/139589/
Document Type:Article
Title:New Reduced-Order Lithium-Ion Battery Model to Account for the Local Fluctuations in the Porous Electrodes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Traskunov, IgorIgor.Traskunov (at) dlr.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.dehttps://orcid.org/0000-0003-1449-8172
Date:8 December 2020
Journal or Publication Title:Energy Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/ente.202000861
Keywords:battery degradation; DFN; homogenization; lithium‐ion battery; numerical modeling; order reduction
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Prcesses (Batteries) (old)
Location: Ulm
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Danner, Timo
Deposited On:16 Dec 2020 21:06
Last Modified:01 Feb 2022 03:00

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