Schmitt, Tobias and Latz, Arnulf and Horstmann, Birger (2020) Derivation of a Local Volume-Averaged Model and a Stable Numerical Algorithm for Simulations of Conversion Batteries. Electrochimica Acta, 333, p. 135491. Elsevier. doi: 10.1016/j.electacta.2019.135491. ISSN 0013-4686.
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Abstract
In this article, we derive a general form of local volume-averaging theory and apply it to a model of zinc-air conversion batteries. Volume-averaging techniques are frequently used for the macroscopic description of micro-porous electrodes. We extend the existing method by including reactions between different phases and time-dependent volume fractions of the solid phases as these are continuously dissolved and reconstructed during operation of conversion batteries. We find that the constraint of incompressibility for multi-component fluids causes numerical instabilities in simulations of zinc-air battery cells. Therefore, we develop a stable sequential semi-implicit algorithm which converges against the fully implicit solution. Our method reduces the coupling of the variables by splitting the system of equations and introducing an additional iteration step.
Item URL in elib: | https://elib.dlr.de/139724/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Derivation of a Local Volume-Averaged Model and a Stable Numerical Algorithm for Simulations of Conversion Batteries | ||||||||||||
Authors: |
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Date: | 2020 | ||||||||||||
Journal or Publication Title: | Electrochimica Acta | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 333 | ||||||||||||
DOI : | 10.1016/j.electacta.2019.135491 | ||||||||||||
Page Range: | p. 135491 | ||||||||||||
Publisher: | Elsevier | ||||||||||||
ISSN: | 0013-4686 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Local volume-averaging theoryMulti-component incompressibility constraintSequential semi-implicit solverNumerical stability analysisZinc-air battery | ||||||||||||
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: | Horstmann, Birger | ||||||||||||
Deposited On: | 16 Dec 2020 21:09 | ||||||||||||
Last Modified: | 16 Dec 2020 21:09 |
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