Journal Article

FZJ-2017-02826

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ester Modified Pyrrolidinium Based Ionic Liquids as Electrolyte Component Candidates in Rechargeable Lithium Batteries

Cao, X. (Corresponding author) ; Röser, S. ; Rezaei Rad, B.FZJ* ; He, X.FZJ* ; Streipert, B. ; Winter, M. (Corresponding author)FZJ* ; Cekic-Laskovic, I.FZJ*

2015
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/zaac.201500554

Abstract: Room temperature ionic liquids (RTILs), especially pyrrolidinium based RTILs with bis(trifluoromethane-sulfonyl)imide (TFSI) as counterion, are frequently proposed as promising electrolyte component candidates thanks to their high thermal as well as high oxidation stability. In order to avoid a resource intensive experimental approach, mainly based on trial and error experiments, a computational screening method for pre-selecting suitable candidate molecules was adopted and three homologous series compounds were synthesized by modifying the cation structure of pyrrolidinium RTILs. The obtained high purity RTILs: methyl-methylcarboxymethyl pyrrolidinium TFSI (MMMPyrTFSI), methyl-ethylcarboxymethyl pyrrolidinium TFSI (MEMPyrTFSI) and methylpropylcarboxymethyl pyrrolidinium TFSI (MPMPyrTFSI) revealed excellent thermal stabilities higher than 300 °C. Furthermore, MMMPyrTFSI and MPMPyrTFSI exhibit high oxidation stability up to 5.4 V vs. Li/Li+. No aluminum corrosion of current collector was observed at 5 V vs. Li/Li+. In addition to that, these RTILs display a superior salt (LiTFSI) solubility (3.0–3.5 M), compared to the unmodified RTIL 1-butyl-1-methylpyrrolidinium TFSI (Pyr14TFSI) (1.5–2.0 M) at room temperature. All these properties make novel ester modified RTILs promising and interesting candidates for application in rechargeable lithium batteries.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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