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Updated: Feb 9, 2026
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Understanding transport mechanisms in ionic liquid/carbonate solvent electrolyte blends
K Oldiges1, D Diddens, M Ebrahiminia
1Helmholtz Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstrasse 46, 48149 Münster, Germany. g.brunklaus@fz-juelich.de.
Physical Chemistry Chemical Physics : PCCP
|June 7, 2018
Summary
Ionic liquid blends offer stable electrolytes for batteries. Optimized blends show high conductivity and lithium-ion transport, comparable to traditional electrolytes but with enhanced stability.
Area of Science:
- Electrochemistry
- Materials Science
- Physical Chemistry
Background:
- Liquid electrolytes are crucial for ion transport in electrochemical devices.
- Understanding ion dynamics in electrolyte blends is key to improving battery performance.
Purpose of the Study:
- Investigate ion transport mechanisms in ionic liquid (IL) and carbonate blends.
- Determine the effect of IL concentration on electrolyte properties and performance.
Main Methods:
- Electrochemical impedance spectroscopy
- Pulsed Field Gradient Nuclear Magnetic Resonance (PFG NMR)
- Raman spectroscopy
- Molecular Dynamics (MD) simulations
Main Results:
- Ion transport and transference numbers remain relatively constant across IL concentrations.
- Ionic conductivity is primarily governed by electrolyte viscosity.
- A shift in lithium coordination from carbonate to TFSI was observed.
- IL/carbonate blends with ~10 wt% Pyr14TFSI show promising conductivity and stability.
Conclusions:
- Electrolyte composition significantly impacts ion coordination and viscosity.
- Optimized IL/carbonate blends offer improved thermal and electrochemical stability.
- Conducting salt choice has minimal impact on transport properties.
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