Next Article in Journal
A Heavy Metal-Associated Protein (AcHMA1) from the Halophyte, Atriplex canescens (Pursh) Nutt., Confers Tolerance to Iron and Other Abiotic Stresses When Expressed in Saccharomyces cerevisiae
Next Article in Special Issue
Application of Ionic Liquids in Hydrometallurgy
Previous Article in Journal
Multi-Step Pathogenesis and Induction of Local Immune Response by Systemic Candida Albicans Infection in an Intravenous Challenge Mouse Model
Previous Article in Special Issue
Applications and Mechanisms of Ionic Liquids in Whole-Cell Biotransformation
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Int. J. Mol. Sci. 2014, 15(8), 14868-14890;

Separators for Li-Ion and Li-Metal Battery Including Ionic Liquid Based Electrolytes Based on the TFSI and FSI Anions

Institute of Physical Chemistry, University of Muenster, Corrensstraβe 28-30, Muenster 48149, Germany
Helmholtz Institute Ulm, Electrochemical Energy Storage, Albert-Einstein-Allee 11, 89081 Ulm, Germany and Karlsruhe Institute of Technology PO Box 3640, Karlsruhe 76021, Germany
Authors to whom correspondence should be addressed.
Received: 24 May 2014 / Revised: 27 June 2014 / Accepted: 8 July 2014 / Published: 22 August 2014
(This article belongs to the Special Issue Ionic Liquids 2014 & Selected Papers from ILMAT 2013)
Full-Text   |   PDF [12285 KB, uploaded 22 August 2014]   |  


The characterization of separators for Li-ion or Li-metal batteries incorporating hydrophobic ionic liquid electrolytes is reported herein. Ionic liquids made of N-butyl-N-methylpyrrolidinium (PYR14+) or N-methoxyethyl-N-methylpyrrolidinium (PYR12O1+), paired with bis(trifluoromethanesulfonyl)imide (TFSI) or bis(fluorosulfonyl)imide (FSI) anions, were tested in combination with separators having different chemistries and morphologies in terms of wetting behavior, Gurley and McMullin number, as well as Li/(Separator + Electrolyte) interfacial properties. It is shown that non-functionalized microporous polyolefin separators are poorly wetted by FSI-based electrolytes (contrary to TFSI-based electrolytes), while the ceramic coated separator Separion® allows good wetting with all electrolytes. Furthermore, by comparing the lithium solid electrolyte interphase (SEI) resistance evolution at open circuit and during cycling, depending on separator morphologies and chemistries, it is possible to propose a scale for SEI forming properties in the order: PYR12O1FSI > PYR14FSI > PYR14TFSI > PYR12O1TFSI. Finally, the impact the separator morphology is evidenced by the SEI resistance evolution and by comparing Li electrodes cycled using separators with two different morphologies. View Full-Text
Keywords: ionic liquids; lithium metal; separator; Li-ion ionic liquids; lithium metal; separator; Li-ion

Figure 1

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Kirchhöfer, M.; von Zamory, J.; Paillard, E.; Passerini, S. Separators for Li-Ion and Li-Metal Battery Including Ionic Liquid Based Electrolytes Based on the TFSI and FSI Anions. Int. J. Mol. Sci. 2014, 15, 14868-14890.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top