TY  - JOUR
AU  - Schmitz, Paulo
AU  - Jakelski, Rene
AU  - Pyschik, Marcelina
AU  - Jalkanen, Kirsi
AU  - Nowak, Sascha
AU  - Winter, Martin
AU  - Bieker, Peter
TI  - Decomposition of Imidazolium-Based Ionic Liquids in Contact with Lithium Metal
JO  - ChemSusChem
VL  - 10
IS  - 5
SN  - 1864-5631
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2017-02795
SP  - 876 - 883
PY  - 2017
AB  - Ionic liquids (ILs) are considered to be suitable electrolyte components for lithium-metal batteries. Imidazolium cation based ILs were previously found to be applicable for battery systems with a lithium-metal negative electrode. However, herein it is shown that, in contrast to the well-known IL N-butyl-N-methylpyrrolidinium bis[(trifluoromethyl)sulfonyl]imide ([Pyr14][TFSI]), 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([C2MIm][TFSI]) and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([C4MIm][TFSI]) are chemically unstable versus metallic lithium. A lithium-metal sheet was immersed in pure imidazolium-based IL samples and aged at 60 °C for 28 days. Afterwards, the aged IL samples were investigated to deduce possible decomposition products of the imidazolium cation. The chemical instability of the ILs in contact with lithium metal and a possible decomposition starting point are shown for the first time. Furthermore, the investigated imidazolium-based ILs can be utilized for lithium-metal batteries through the addition of the solid–electrolyte interphase (SEI) film-forming additive fluoroethylene carbonate.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000398182300009
C6  - pmid:27996216
DO  - DOI:10.1002/cssc.201601496
UR  - https://juser.fz-juelich.de/record/828978
ER  -