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Batteries 2018, 4(4), 62; https://doi.org/10.3390/batteries4040062

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

1
Helmholtz Institute Münster: Ionics in Energy Storage (IEK-12: HIMS), Forschungszentrum Jülich GmbH, Corrensstrasse 46, D-48149 Münster, Germany
2
Institute of Physical Chemistry, University of Münster, Corrensstrasse 28/30, D-48149 Münster, Germany
3
MEET Battery Research Center, Corrensstrasse 46, D-48149 Münster, Germany
*
Author to whom correspondence should be addressed.
Received: 2 October 2018 / Revised: 16 November 2018 / Accepted: 20 November 2018 / Published: 3 December 2018
(This article belongs to the Special Issue Carbon-Based Batteries: From Fundamental to Practical Applications)
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Abstract

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. View Full-Text
Keywords: electrolyte solutions; solvents and co-solvents; ion complex formation; ion correlation effects; molecular theory of solution; additives; lithium-ion batteries; lithium batteries electrolyte solutions; solvents and co-solvents; ion complex formation; ion correlation effects; molecular theory of solution; additives; lithium-ion batteries; lithium batteries
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Smiatek, J.; Heuer, A.; Winter, M. Properties of Ion Complexes and Their Impact on Charge Transport in Organic Solvent-Based Electrolyte Solutions for Lithium Batteries: Insights from a Theoretical Perspective. Batteries 2018, 4, 62.

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