activated carbon

The characteristics of the electrochemical capacitors (EC), formed on the basis of the nanoporous carbon (NC) modified by the special heat treatment and doped by Cr and Mn, are explored. It is set, that the given modification of NC increases the specific capacity of the proper EC on 35-75% regardless of NC receipt method.

The admixtures redistribution in a nanoporous carbon due to laser irradiation is explored and influence of the irradiation on the parameters of the supercapacitors formed on the basis of irradiated nanoporous carbon is determined. Laser treatment of the activated carbon doped by Er, Mn, and Cu is shown to substantially affect the spatial redistribution of the inserted atoms, their energy and charge state, and also on conductivity of the activated carbon and therefore on the parameters of the supercapacitors formed on its basis.

A various features of the electrochemical behavior of number superfine carbon materials in electrolyte based on an ionic liquid 1-methyl-3-butilimidazolium tetrafluorineborate (1Me3BuImBF4) were determined by voltammetry and impedance methods. A comparative analysis of the effect of the type and nature of the electrolyte material on the main electrochemical characteristics of carbon electrodes which may be used in supercapacitors was done.

The electrochemical characteristics of the electrode material based on activated “NORIT B Test EUR” carbon in 1 M sodium sulfate solution were evaluated by cyclic voltammetry, galvanostatic charge-discharge curves, and impedance spectroscopy. It is established that this material has low resistance, and the specific capacity of the electrode was 45 F/g.

The electrochemical properties of C/MnO₂ composite materials in 1 M sodium sulfate solution were investigated using the methods of cyclic voltammetry, galvanostatic charge-discharge and impedance spectroscopy. It was shown that the capacitive characteristics of the electrodes depend on the nature and the method of obtaining manganese oxide nanoparticles. It was established that the material containing manganese oxide obtained using isoamyl alcohol as a reducing agent has high electrochemical characteristics.