A Hybrid Anion for Ionic Liquid and Battery Electrolyte Applications: Half Triflamide, Half Carbonate

Kaitlyn E Gunderson-Briggs; Thomas Rüther; Adam S Best; Mega Kar; Craig Forsyth; Ekaterina I Izgorodiana; Douglas R MacFarlane; Anthony F Hollenkamp

doi:10.1002/anie.201813091

A Hybrid Anion for Ionic Liquid and Battery Electrolyte Applications: Half Triflamide, Half Carbonate

Angew Chem Int Ed Engl. 2019 Mar 22;58(13):4390-4394. doi: 10.1002/anie.201813091. Epub 2019 Feb 21.

Authors

Kaitlyn E Gunderson-Briggs^{1

2}, Thomas Rüther³, Adam S Best¹, Mega Kar², Craig Forsyth², Ekaterina I Izgorodiana², Douglas R MacFarlane², Anthony F Hollenkamp³

Affiliations

¹ Manufacturing, Commonwealth Scientific and Industry Research Institution (CSIRO), Research Way, Clayton, 3168, Victoria, Australia.
² School of Chemistry, Clayton, 3168, Victoria, Australia.
³ Energy, Commonwealth Scientific and Industry Research Institution (CSIRO), Research Way, Clayton, 3168, Victoria (Australia.

PMID: 30632254
DOI: 10.1002/anie.201813091

Abstract

The synthesis of a new imide type anion, methylcarbonate(trifluoromethylsulfonyl)imide (MCTFSI) is described and the physicochemical properties of its sodium and N-butyl-N-methyl pyrrolidinium salts as well as structural information obtained by X-ray diffraction studies of the sodium salt are discussed in terms of charge delocalisation, coordination chemistry and electrochemical behaviour with respect to the analogous imdides bis(trifluoromethanesulfonyl)imide (TFSI) and bis(fluorosulfonyl)imide (FSI). The insight obtained from studying the new anion informs and reemphasizes the concept of weakly coordinating anions and coordination chemistry in designing electrolyte salts.

Keywords: N,O ligands; anions; batteries; coordination chemistry; ionic liquids.