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Theory of Transport in Highly Concentrated Electrolytes

Schammer, Max and Horstmann, Birger and Latz, Arnulf (2021) Theory of Transport in Highly Concentrated Electrolytes. Journal of The Electrochemical Society, 168 (2). Electrochemical Society, Inc.. doi: 10.1149/1945-7111/abdddf. ISSN 0013-4651.

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Official URL: https://iopscience.iop.org/article/10.1149/1945-7111/abdddf/pdf


Ionic liquids are promising candidates for novel electrolytes as they possess large electrochemical and thermodynamic stability and offer a high degree of tunability. As purely-ionic electrolyte without neutral solvent they exhibit characteristic structures near electrified interfaces and in the bulk, both being described theoretically via separate frameworks and methodologies. We present a holistic continuum theory applying to both regions. This transport theory for pure ionic liquids and ionic liquids-mixtures allows the systematic description of the electrolyte evolution. In particular, dynamic bulk-transport effects and interfacial structures can be studied. The theory is thermodynamically consistent and describes multi-component solutions (ionic liquids, highly concentrated electrolytes, water-in-salt electrolytes). Here, we give a detailed derivation of the theory and focus on bulk transport processes of ionic liquids as appearing in electrochemical cells. In addition, we validate our framework for a zinc-ion battery based on a mixture of ionic-liquid and water as electrolyte.

Item URL in elib:https://elib.dlr.de/147605/
Document Type:Article
Title:Theory of Transport in Highly Concentrated Electrolytes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schammer, MaxMax.Schammer (at) dlr.dehttps://orcid.org/0000-0002-9598-8343
Horstmann, Birgerbirger.horstmann (at) dlr.dehttps://orcid.org/0000-0002-1500-0578
Latz, ArnulfArnulf.Latz (at) dlr.dehttps://orcid.org/0000-0003-1449-8172
Date:5 February 2021
Journal or Publication Title:Journal of The Electrochemical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1149/1945-7111/abdddf
Publisher:Electrochemical Society, Inc.
Series Name:Focus Issue on Molten Salts and Ionic Liquids II
Keywords:ionic liquids, electrolytes, transport theory, continuum modeling, batteries, zinc ion batteries, convection
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 - Energie und Verkehr
Location: Ulm
Institutes and Institutions:Institute of Engineering Thermodynamics > Computational Electrochemistry
Deposited By: Schammer, Max
Deposited On:23 Dec 2021 21:14
Last Modified:23 Dec 2021 21:14

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