Chloride‐Free Method to Synthesise New Ionic Liquids with Mixed Borate Anions

Abstract

Chloride avoided! A new chloride-free method to synthesise ionic liquids (ILs) with mixed borate anions, starting from tetrafluoroborate compounds, has been developed and a number of examples including some new ILs are presented (see scheme; [CAT](+) = cation). It is widely applicable and allows access to mixed borates with various types of ligands in a straightforward manner.

Electrochemical characterization of electrolytes for lithium-ion batteries based on lithium difluoromono(oxalato)borate

“…The lithium salts LiPF 6 and LiBF 4 were purchased from Stella (high purity), lithium trifluoromethylsulfonate (LiOTf) from Merck KGaA, Darmstadt (high purity), bis(trifluoromethansulfonyl) imide (LiTFSI) from 3 M (battery grade, HQ115) and LiBOB from Chemetall, Frankfurt (battery grade). LiDFOB was prepared by the synthesis route introduced by Schreiner et al [19] resulting in a fine white powder in quantitative yield. Thermal stability measurements were carried out with a Perkin-Elmer Thermogravimetric analyzer (TGA-7).…”

“…During cooling down to room temperature the foil-quartz assembly was pressed together by a weight. 11 B-NMR (128.4 MHz) and 19 F-NMR (282.4 MHz) spectra were recorded on a Bruker Avance 400 spectrometer with BF 3 ·Et 2 O and CFCl 3 as external standards, respectively. The solvent used for hydrolysis measurements was deuteriumoxide (Deutero GmbH, Kastellaun, 99.9% D 2 O), mixed with DI water (1:1).…”

Results from a Novel Method for Corrosion Studies of Electroplated Lithium Metal Based on Measurements with an Impedance Scanning Electrochemical Quartz Crystal Microbalance

“…LiDFOB was prepared in quantitative yield by the synthesis route described by Schreiner et al [58,59]. The electrolyte solution of 1 M LiDFOB in EC-DEC (3:7, by wt.)…”

Salt-In-Polymer Electrolytes Based on Polysiloxanes for Lithium-Ion Cells: Ionic Transport and Electrochemical Stability

“…LiDFOB (lithium difluoro(oxalato)borate) was synthesized by SCHREINER et al (29) and was used as a solution in THF. In a preparation flask, approximately 0.75 g of the polysiloxane PSx-[P(EO) 3 OMe] 87.5% [PSi(OMe) 3 reaction solution was stirred for 6 h until a slight increase in viscosity was observed.…”