Kurepa A. Mechanisms of the processes of electrical energy accumulation at the interface of the activated carbon with the electrolyte.

The thesis investigated the mechanisms of charge storage in activated carbon materials modified by manganese. The addition of 0.6% manganese in the surface layers of activated carbon material causes significant increase in the density of states at the Fermi level of the material, which provides a significant increase in capacity of the electric double layer, regardless of the type of electrolyte.An increase in the concentration in the alkaline electrolyte leads to expansion of the potential limits of the electric double layer capacitor according to the mechanism of electrostatic charge accumulation. Potential release of the interface of activated carbon material with 30% aqueous KOH solution for pseudocapacitive storage of hydrogen is 0.49 V.It was shown that the interface of the activated carbon material with an iodine electrolyte is unlocked by Faraday processes. The mechanism of such pseudocapacitive energy storage is electrosorption of iodine, which is forming a chemical bond with the surface of the material, increases the sp2 hybridization and the conductivity of activated carbon material. The model of the processes of electrostatic and pseudocapacitive accumulation of electrical energy at the interface of the activated carbon material with iodide electrolyte based on the impedance data was proposed.Electrochemical parameters of built on the basis of electrosorption of iodine hybrid supercapacitor was defined, which ahead of most modern types of batteries.