электропроводность

Theoretical research of conductivity of polymeric insulators in the normal state and at emergency is carried out. Analytical description of temperature and electric effects on the normal conductivity of a polymer and on its electric longevity is given. 

The phase composition, thermal coefficient of linear expansion and electrical conductivity of Y1-xСaxСг1-yСиуО3-b (х-=0.2 and 0.3; y = 0.05-0.3) are investigated at air in the temperature range 100—1000°C. The thermal coefficient of linear expansion are in range of (9.8—11.5).10-6-4deg-1. The TCLE of some composition close to TCLE of solid electrolyte based on zirconium dioxide. The maximum conductivity is achieved for composition: Y0.8Ca0.2Cr0.9Cu0.1)3-b and Y0.7Ca0,3Cr0.85Cu0.15O3-b at substitution of chromium for copper. 

New potassium-conducting solid electrolytes in the mixed alumoferrite system К0.90Ва0.05Al1-xFexO2 were synthesized and studied. The effect of increasing conductivity with simultaneous presence of aluminium and ferrum cations has been established. The maximum conductivity in the system reaches very high values: ~ 6°10-2 S*cm-1 at 400°C, ~ 2°10-1 S*cmт-1 at 700°C. Possible nature of obtained results is discussed.

The possibility of using organic esters of phosphoric acid as a solvents for the electrolyte for lithium-ion systems and supercapacitors was investigated. Supercapacitors based on activated carbon Norit Supra and on the electrolyte being studied showed fine electrochemical performance which is comparable with standard electrolytes based on propylene carbonate. Lithium-ion batteries (Li4Ti5O12-LiNiO2 system) also showed a good performance.

In this work, the effect of humidity on the microstructural degradation of nickel-based metal– ceramic composite materials containing 0, 10, 20, 40, and 60 wt.% of cobalt in the metallic phase was investigated. The increase in cobalt concentration was found to have a beneficial effect on the stability of the microstructure and the long-term electrical conductivity, indicating the perspective of cobalt alloying as an approach to improve the performance and durability of SOFC anodes.

To increase the accuracy of determining the lithium cation transference numbers we proposed to measure them at different values of the polarizing voltage and extrapolate the calculated values to the zero value of the polarizing voltage.

The temperature dependencies of physical and chemical properties (viscosity, density, electrical conductivity) and the melting temperature of 1M solutions of lithium salts (LiClO₄ and LiBF₄) in the mixture of sulfolane and sulfurous anhydride (∼1M) were studied.

The phase composition, conductivity and corrosion resistance under the Molten Carbonate Fuel Cell (MCFC) operating conditions of synthesized using common ceramic and cocrystallization techniques samples of LaLi_0.1Со_0.1Fe_0.8O_{3 – δ} have been studied. It was found, that the phase composition of synthesized by ceramic technique sample differed from the nominal composition.

Ал electroconductivity of the solid lithium conducting electrolyte on the basis of the Li₂S-Sb₂S₃, system is researched at the points interval +10 – +50°C, that is 1.5-2.5·10^-4 S^-1·cm^-1 Temperature dependence of the electroconductivity allows to get the quantities of activation power 0.354-0.430 eV.