The research covers the synthesis of ionic liquids containing anions fluoroboric acid and quaternary ammonium cations with one ether group. The ionic conductivities of 1M solutions of the synthesized ionic liquids in acetonitrile were measured. They range from 27 to 36 mS/cm, which allows to use solutions as working electrolytes in electrochemical capacitors. It was found that the window of electrochemical stability of the investigated ionic liquids constitutes 3.6-6.1 V and depends on cation structure.

The efficiency of the electrolyte based on the mixture of acetonitrile – tetramethylammonium bis(oxalate)borate with the concentration of the latter 0.7 mol/kg in double layer supercapacitors has been shown. Electrochemical properties of active carbon materials Norit DLC Supra 30 and Kausorb-212 have been investigated in supercapacitor samples of disk construction in 2016 dimensions using potentiodynamic and galvanostatic methods.

Recent experimental results on the electrical and electrochemical properties of carbon-carbon electrodes of electrochemical capacitors (supercapacitors) are discussed. The dependence of electronic conductivity, specific capacity and the equivalent series resistance on the concentration and nature of the conductive filler is revealed: carbon black PA-76, carbon fibers VGCF grown in vacuum. It is established that the capacity of the electrical double layer formed on the high extended surface area of carbon-carbon electrode material of electrochemical capacitor obtain a maximum value of 115 F / g at a concentration of conductive filler 15%. The equivalent series resistance does not depend on the concentration and nature of the conductive filler and electrical contact is defined on the boundary of the electrode material / current collector.