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Revealing SEI Morphology: In-Depth Analysis of a Modeling Approach

Single, Fabian and Horstmann, Birger and Latz, Arnulf (2017) Revealing SEI Morphology: In-Depth Analysis of a Modeling Approach. Journal of The Electrochemical Society (164/11), E3132-E3145. Electrochemical Society, Inc.. DOI: 10.1149/2.0121711jes ISSN 0013-4651

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Official URL: http://jes.ecsdl.org/content/164/11/E3132.abstract

Abstract

In this article, we present a novel theory for the long term evolution of the solid electrolyte interphase (SEI) in lithium-ion batteries and propose novel validation measurements. Both SEI thickness and morphology are predicted by our model as we take into account two transport mechanisms, i.e., solvent diffusion in the SEI pores and charge transport in the solid SEI phase. We show that a porous SEI is created due to the interplay of these transport mechanisms. Different dual layer SEIs emerge from different electrolyte decomposition reactions. We reveal the behavior of such dual layer structures and discuss its dependence on system parameters. Model analysis enables us to interpret SEI thickness fluctuations and link them to the rate-limiting transport mechanism. Our results are general and independent of specific modeling choices, e.g., for charge transport and reduction reactions.

Item URL in elib:https://elib.dlr.de/117453/
Document Type:Article
Title:Revealing SEI Morphology: In-Depth Analysis of a Modeling Approach
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Single, Fabianfabian.single (at) dlr.deUNSPECIFIED
Horstmann, Birgerbirger.horstmann (at) dlr.deUNSPECIFIED
Latz, Arnulfarnulf.latz (at) dlr.deUNSPECIFIED
Date:5 May 2017
Journal or Publication Title:Journal of The Electrochemical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1149/2.0121711jes
Page Range:E3132-E3145
Publisher:Electrochemical Society, Inc.
Series Name:JES Focus Issue on Mathematical Modeling of Electrochemical Systems at Multiple Scales in Honor of John Newman
ISSN:0013-4651
Status:Published
Keywords:SEI, Li-Ion, Battery
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Single, Fabian
Deposited On:21 Dec 2017 17:09
Last Modified:31 Jul 2019 20:14

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