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Modeling of Ion Agglomeration in Magnesium Electrolytes and its Impacts on Battery Performance

Drews, Janina; Danner, Timo; Jankowski, Piotr; Vegge, Tejs; García Lastra, Juan Maria; Liu, Runyu; Zhao‐Karger, Zhirong; Fichtner, Maximilian; Latz, Arnulf

Abstract:
The choice of electrolyte has a crucial influence on the performance of rechargeable magnesium batteries. In multivalent electrolytes an agglomeration of ions to pairs or bigger clusters may affect the transport in the electrolyte and the reaction at the electrodes. In this work the formation of clusters is included in a general model for magnesium batteries. In this model, the effect of cluster formation on transport, thermodynamics and kinetics is consistently taken into account. The model is used to analyze the effect of ion clustering in magnesium tetrakis(hexafluoroisopropyloxy)borate in dimethoxyethane as electrolyte. It becomes apparent that ion agglomeration is able to explain experimentally observed phenomena at high salt concentrations.

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Verlagsausgabe §
DOI: 10.5445/IR/1000122032
Veröffentlicht am 24.07.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Post Lithium Storage (POLiS)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 22.07.2020
Sprache Englisch
Identifikator ISSN: 1864-5631, 1864-564X
KITopen-ID: 1000122032
HGF-Programm 37.01.01 (POF III, LK 01) Fundamentals and Materials
Erschienen in ChemSusChem
Verlag Wiley-VCH Verlag
Band 13
Heft 14
Seiten 3599–3604
Vorab online veröffentlicht am 28.05.2020
Nachgewiesen in Web of Science
Scopus
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