ELECTROLYTE SOLUTE, ELECTROLYTE AND HIGH-VOLTAGE SUPERCAPACITOR

摘要

An electrolyte solute for a high-voltage supercapacitor; the anion is selected from one or more of tetrafluoroborate, hexafluorophosphate, di-(trifluoromethyl sulphonyl) imine, tri-(trifluoromethyl sulphonyl) methyl and perfluoroalkyl sulfonate; and the cation of the solute is one or more of trimethyl ethyl ammonium, trimethyl propyl ammonium, trimethyl butyl ammonium and trimethyl pentyl ammonium. Also disclosed are an electrolyte and supercapacitor using same. The high-voltage supercapacitor made from the electrolyte prepared with the solute can stably work for a long period of time under a voltage of 2.7 V - 3.2 V, thus greatly improving energy density, maintaining high power density thereof, and greatly extending the service life of a capacitor.