Properties of Ion Complexes and Their Impact on Charge Transport in Organic Solvent-Based Electrolyte Solutions for Lithium Batteries: Insights from a Theoretical Perspective

Electrolyte formulations in standard lithium ion and lithium metal batteries are complex mixtures of various components. In this article, we review molecular key principles of ion complexes in multicomponent electrolyte solutions in regards of their influence on charge transport mechanisms. We outli...

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Bibliographic Details
Published in:Batteries (Basel) 2018-12, Vol.4 (4), p.62
Main Authors: Smiatek, Jens, Heuer, Andreas, Winter, Martin
Format: Article
Language:English
Subjects:
Additives
Approximation
Charge transport
Coordination compounds
electrolyte solutions
Electrolytes
Formulations
Influence
ion complex formation
ion correlation effects
Lithium batteries
Lithium ions
lithium-ion batteries
molecular theory of solution
Rechargeable batteries
Solvents
solvents and co-solvents
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Summary:Electrolyte formulations in standard lithium ion and lithium metal batteries are complex mixtures of various components. In this article, we review molecular key principles of ion complexes in multicomponent electrolyte solutions in regards of their influence on charge transport mechanisms. We outline basic concepts for the description of ion–solvent and ion–ion interactions, which can be used to rationalize recent experimental and numerical findings concerning modern electrolyte formulations. Furthermore, we discuss benefits and drawbacks of empirical concepts in comparison to molecular theories of solution for a more refined understanding of ion behavior in organic solvents. The outcomes of our discussion provide a rational for beneficial properties of ions, solvent, co-solvent and additive molecules, and highlight possible routes for further improvement of novel electrolyte solutions.
ISSN:2313-0105
2313-0105
DOI:10.3390/batteries4040062