Электрохимические конденсаторы

The ivestigations of the behaviour of electrochemical systems organized by direct contact of anode-alkaline metal Li and cathode-organic semiconductor selected from a number of thyopyran derivatives have been carried out. It has been found, that by the contact the transitional layer – electronic dielectric ensuring stable value of electromotive force and performing functions of a unipolar conductor on ions Li+ and in the electrical field is formed.

The investigations of transient processes on lithium-thiopyryllium hexochlorostonnate border by the method of chronopotentiometry have been carried out. The formation of interphase layers with a grain structure has been found. The formation of such layers can control the kinetics of anode and cathode processes. A transient layer performs Li⁺ ions functions of a unipolar conductor in the electric field and is adequately described by the model of currents limited by a space charge

We have developed a facility that helps to produce positive active material for lamellar oxide-nickel electrodes with expensive raw material loss reduced to a minimum. It has allowed to significantly improve working conditions for those involved in making active material. Having mechanized principal operations we have managed to reduce the cost of production and labour input. This, in turn, has lowered the prime cost of nickel-cadmium storage batteries manufactured at Joint stock Co., open Autonomous Power Sources Plant, Saratov.

We have represented the results of the research for the current output (efficiency) of the battery formation for lead-acid starter batteries with the accelerated technology rated for 16 hours of the formation. It is determined, the basic lead sulfates transformed into active material of electrodes mainly during the first 3 hours of process. The neutral lead sulfate transformed into active material mainly during the period between 3 and 6 hours of process. The water electrolysis reaction became primary after 6–7 hours of formation process.

New solid electrolytes with highlithium cationic conductivity based on lithium orthogermanate in the system Li_{4 – x – 3y}Al_yGe_{1 – x}P_xO₄ were synthesized and studied. Electrolytes have skeleton structure of the ?-Li₃PO₄ type. The introdution of Al³⁺ ions leads to increase of electrolytes conductivity in comparisons with basic system Li₄GeO₄ – Li₃PO₄.

Thermodynamic properties (S⁰₂₉₈, H⁰₂₉₈-H⁰₀, ?H⁰₂₉₈, c_p(T)) for cobalt oxides Co₂O₃, CoO₂ and LiCoO₂ have been found using calculating methods. Obtained values can be applied to calculation of physicochemical properties of the systems where indicated compounds are components.

The contribution of proton conductivity to a superficial current not irradiated and irradiated scale in quantum of an isotope source ⁶⁰Cо wet samples porous corundum silicate glasses in an interval of temperatures 200–380 K. It is revealed significant increase of size of a superficial current with a maximum was investigated at 306–310 K, which after an irradiation extends aside low temperatures to proportionally doze.

We have studied the capacitance and kinetic properties of nanoporous carbon material which was obtained from wood. The maximum radius pore distribution of the investigated material was 1.37 nm. The data from X-ray scattering and electrochemical impedance spectroscopy was used to investigate the influence of porous structure change and electronic structure of activated carbon material on the mechanism and kinetics of charge-discharge at 7.6m KOH solution.

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.