ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)


Sulfurizingpoly(5-vinyl-2-methyl)pyridine: synthesis and electrochemical properties

Poly(5-vinyl-2-methylpyridine) sulfurized with elemental sulfur at 140-320°C (sulfur content up to 45%) possess electric conductivity (6.4·10-11-1.6·10-7 S/cm), paramagnetism 6.2·1018–5.0·1019 sp/g, g = 2.0043-2.0046, AH = 0.49-0.58 mT), redox and complex-forming properties.

Research of solid-state short-circuit system Li/polymeric composite of PAN for CSC

The researches of behaviour of electrochemical systems organized by a method of direct contact of the Li-anode and a polymeric composite, including co-polymer polyacrylonitrile and organic semiconductor representing salt of thiopyrily with ClO4- and SnCl62- anions are carried out. The basic electrochemical parameters of researched systems are determined.

Thermodynamic simulation of oxide ionic equilibria in mixtures of alkali element carbonates

The thermodynamic simulation of equilibriums in the system O2 + СO2 gas mixture – molten alkali carbonates has been performed. Two schemes were proposed to calculate the chemical equilibriums: CO32- = О2- + CO2, O22- = O22- + 1/2O2, 2O2- = О2- + 3/2O2.

The automatic module for cycling of electrochemical cells

The automatic module device for cycling in galvanostatic regime with a wide range of charge/discharge current and measuring signals from electrochemical cells is developed. The software allowing governing the cycling processes and providing friendly interactive interface is written.

Hydrogen accumulation in nickel-cadmium accumulators and the process of thermal runaway

Through the thermal decomposition it was shown that in electrodes of nickel-cadmium accumulators having long periods of operation there is a great amount of hydrogen. For example, in the accumulator НКБН-25-УЗ having a five year's period of operation there are approximately 805 litres of hydrogen.

Impedance spectroscopy studies of Li/Bi2Se3 <1%Cu> system

The system Li/1M LiBF4 in γ-butyrolactone/Вi2Se3 <1%Си> is firstly investigated by the impedance spectroscopy method. The measured impedance spectra as a function of the depth of discharge and temperature are presented. Modeling the experimental data was carried out on the basis of different equivalent circuits and their acceptance is estimated. We have determined the parameters of the circuits' elements and found the coefficients describing the electrode reactions and interfaces.

The structural model of the alkaline accumulator. Relaxational polarization

The structural model of the alkaline accumulator based on the well-known empirical dependences describing the accumulator discharge was suggested. It was shown that to describe the discharge curves correctly together with the basic current producing chemical reaction there must be a parallel chemical reaction that results in an unstable phase of small capacity.

Structural modelling of the process of self-discharging in alkaline accumulators

A structural model of the alkaline accumulator that takes into account self-discharging is suggested from which all the well-known empirical dependences were obtained. It was shown that the existing empirical dependences describing the process of self-discharging in alkaline accumulators don't contradict one another but supplement each other as they are true, each in its interval of discharging time.

Usage of fuel elements in house building

Problems of using fuel cells as both electric and heat energy sources are reviewed. Such "hybrid" fuel cells possess enhanced net efficiency up to 90%. Some examples of fuel cells sets use in dwelling from small cottages up to multi-storey hotels are presented.