Kuzyshyn M. Pseudoaccumulation of electrical energy in electrochemical systems based on nanoporous carbon

In the thesis it was investigated the conditions of nanoporous carbon modification influence on the pseudocapacitance accumulation of the electric charge processes in the electrochemical capacitors. It is determined, that in case of the 85:15 ratio of nanoporous carbon to thermal exfoliated graphite in the composite electrode material and the dimensions of these parts about 160 - 200 nm, the value of the specific capacitance increases to 160 F/g. As the result of chemical nitrogen acid treatment of the nanoporous carbon, there are formed the nitrogen-containing compounds, such as amides, amines, imines, nitriles and pyridines, that causes the decrease in the number of 0,85 - 1,25 nm pores, and according the increase in the number of 0,65 - 0,85 nm pores. With all this, the part of the pseudocapacitance caused by the quick reverse Faraday processes including the surface nitrogen functional groups makes 30% of the full capacitance of pseudocapacitor. It is worked out and realized the method of metal oxides deposition on the nitrogen-containing nanoporous carbon material surface, that enables the increase of the pseudocapacitance due to redox reactions. To pioneer experience that if the inclusion of the metal by 1% nickel, cobalt and ferrum oxides cause the increase of the chemical condenser carbon electrode's specific capacitance to 260 F/g if the discharge current 0,3 A/g. It is the first time proposed the Drude-Smith model to illustrate the dependence of the conductivity of carbonated materials on the frequency.