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

Электролиты для химических источников тока

Effect of lithium perchlorate concentration on lithium cation transference number in sulpholane solutions

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.

Physical and chemical properties of lithium perchlorate and tetrafluoroborate solutions in the mixture of sulpholane and sulfurous anhydride

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.

ВЛИЯНИЕ КОНЦЕНТРАЦИИ ПЕРХЛОРАТА ЛИТИЯ НА ЧИСЛА ПЕРЕНОСА КАТИОНА ЛИТИЯ В СУЛЬФОЛАНОВЫХ РАСТВОРАХ

Для повышения точности определения предложено проводить измерения чисел переноса катиона лития при различных значениях поляризующего напряжения и экстраполировать рассчитанные величины чисел переноса на нулевое значение поляризующего напряжения.

ФИЗИКО-ХИМИЧЕСКИЕ СВОЙСТВА РАСТВОРОВ ПЕРХЛОРАТА И ТЕТРАФТОРБОРАТА ЛИТИЯ В СМЕСИ СУЛЬФОЛАНА И СЕРНИСТОГО АНГИДРИДА

Изучены температурные зависимости физико-химических свойств (вязкость, плотность, электропроводность) и температуры плавления 1М растворов солей лития (LiClO4 и LiBF4) в смеси сульфолана и сернистого ангидрида (~1М). Показано, что введение 1М (5 % мас.) содержание сернистого ангидрида в 1М растворы LiClO4 и LiBF4 в сульфолане увеличивает удельную и корригированную электропроводности, плотности, энергии активации электропроводности и вязкого течения электролитных растворов и уменьшает вязкость и температуры плавления.

Influence of gallium additives on the anodic behavior of the conductive aluminum alloy E-AlMgSi (aldrey) in NaCl electrolyte medium

The work presents the results of the study of the anodic behavior of aluminum alloy E-AlMgSi (aldrey) with gallium, in the medium of 0.03; 0.3 и 3.0% NaCl electrolyte. The corrosion-electrochemical study of alloys was carried out using the potentiostatic method. It was shown that doping E-AlMgSi (aldrey) with gallium increased its corrosion resistance by 20%. The main electrochemical potentials of the alloys when doping with gallium are shifted to the positive range of values, and at the concentration of sodium chloride to the negative values of the ordinate axis.

Modernization of the flash point tester PE-TVZ for determining fire safety of electrolyte systems of energy-intensive batteries

The flash point tester PE-TVZ was modernized. The sample volume was reduced from 70 to 5 ml. Mixing of the condensed and gas-vapor phases was done simultaneously. The mercury thermometer was replaced by an electronic one. The correctness of the flash point measurement by the modernized device was tested on the samples with the flash point in the range of 25–170°C.

МОДЕРНИЗАЦИЯ АНАЛИЗАТОРА ТЕМПЕРАТУРЫ ВСПЫШКИ ПЭ-ТВЗ ДЛЯ ОПРЕДЕЛЕНИЯ ПОЖАРОБЕЗОПАСНОСТИ ЭЛЕКТРОЛИТНЫХ СИСТЕМ ЭНЕРГОЕМКИХ АККУМУЛЯТОРОВ

Выполнена модернизация анализатора температуры вспышки ПЭ-ТВ3. Объем пробы уменьшен с 70 до 5 мл. Перемешивание конденсированной и газово-паровой фазы осуществляется одновременно. Измерительный ртутный термометр заменен на электронный. Корректность измерения температуры вспышки модернизированным прибором проверена на образцах, обладающих температурой вспышки в диапазоне 25-170 °С.

Property characteristics of electrolyte systems of aluminium chloride – thionilchloride – cosolvent as defined by the MMR spectroscopy

Solutions of AlCl3, in solvent mixtures: thionyl chloride – sulfur dioxide, thionyl chloride – nitromethane, thionyl chloride – methyl acetate, thionyl chloride – propylene carbonate had investigated by means NMR 27Аl spectroscopy under 293 K.

Anion effect on the properties of some lithium salts in diethyl carbonate

A physicochemical study was made on solutions of a number of lithium salts in diethyl carbonate (DEC) within -20+60°C by means of isothermal saturation, densimetry, and conductometry. The solid phase composition in saturated solutions for LiBF4, LiPF6, and LiCIO4 in DEC were determined. The solubility of the crystal solvates LiBF4·DEC and LiPF6·2DEC increases with temperature while the temperature dependence of the LiCIO4·2DEC goes through an extremum.

Conductivity of the zirconia-based solid electrolyte with grain size in submicron range

Conductivity of yttria stabilized zirconia (YSZ) produced from weakly agglomerated nanopowder investigated by ac impedance spectroscopy. Dense ceramic samples with grain size from 90 to 800 nm were made by variation of both pressing and sintering conditions. It is found that the bulk conductivity is independent of grain size, but grain boundary conductivity is depended. Observed grain boundary resistance increases with grain size. It is in contradiction with previous results observed for range 1–18 μm where grain boundary resistance decreases with grain size.

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