Electrolyte synthesis for ultracapacitors
AssigneeCorning Incorporated
InventorKishor Purushottam Gadkaree
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Abstract
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.
Claims16
A method of forming an electrolyte solution comprising:
- combining ammonium tetrafluoroborate and a quaternary ammonium halide in a liquid solvent to form a quaternary ammonium tetrafluoroborate and an ammonium halide;
- and
- removing the ammonium halide from the solvent to form an electrolyte solution.
An electrolyte solution comprising a quaternary ammonium tetrafluoroborate salt dissolved in a solvent, wherein
- a concentration of chloride ions in the electrolyte solution is less than 1 ppm;
- a concentration of bromide ions in the electrolyte solution is less than 1000 ppm;
- and
- a concentration of ammonium ions in the electrolyte solution is greater than 1 ppm.
Dependencies are inferred from the claim text.