Preparation of electrolyte containing tetraalkylammonium tetrafluoroborate, used in electrochemical cell or capacitor, involves mixing tetraalkylammonium halide and metal tetrafluoroborate in (partly) water-miscible organic solvent

摘要

Preparation of electrolyte compositions (I) containing tetraalkylammonium tetrafluoroborate comprises a stage (i) for mixing tetraalkylammonium halide(s) with metal tetrafluoroborate(s) in partly or completely water-miscible organic solvent(s). An Independent claim is also included for (I) prepared in this way.