%0 Journal Article
%A Cao, Xia
%A Röser, Stephan
%A Rezaei Rad, Babak
%A He, Xin
%A Streipert, Benjamin
%A Winter, Martin
%A Cekic-Laskovic, Isidora
%T Ester Modified Pyrrolidinium Based Ionic Liquids as Electrolyte Component Candidates in Rechargeable Lithium Batteries
%J Zeitschrift für anorganische und allgemeine Chemie
%V 641
%N 14
%@ 0044-2313
%C Weinheim
%I Wiley-VCH
%M FZJ-2017-02826
%P 2536 - 2542
%D 2015
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000368040700030
%R 10.1002/zaac.201500554
%U https://juser.fz-juelich.de/record/829009