Electrolyte synthesis for ultracapacitors

摘要

A method of forming an electrolyte solution involves combining ammonium tetrafluoroborate and a quaternary ammonium halide in a liquid solvent to form a quaternary ammonium tetrafluoroborate and an ammonium halide. The ammonium halide precipitate is removed from the solvent to form an electrolyte solution. The reactants can be added step-wise to the solvent, and the method can include using a stoichiometric excess of the ammonium tetrafluoroborate to form a substantially halide ion-free electrolyte solution.

主权项

1. A method of forming an electrolyte solution comprising:
combining ammonium tetrafluoroborate and triethylmethyl ammonium bromide as reactants to form a suspension in a liquid solvent; reacting the ammonium tetrafluoroborate and the triethylmethyl ammonium bromide to form triethylmethyl ammonium tetrafluoroborate and ammonium bromide; and removing the ammonium bromide from the solvent to form an electrolyte solution, wherein the amount of at least one of the reactants is greater than that reactant's solubility in the solvent.