Щелочные аккумуляторы

The mock-up of nickel-metal hydride storage battery of filter-press type with rated voltage of 6 V and capacity of 1.7 A·h is assembled and tested. The capability of storage battery operation with bipolar nickel-metal hydride electrodes in a single case with common gas collector is demonstrated, and the problems, consideration of which will enable to enter on a battery prototype stage, are defined.

The probability of the thermal runaway in nickel-cadmium accumulators with lamellar electrodes has been studied experimentally. It has been shown that in electrodes of these accumulators that have long terms of service there is a great amount of hydrogen just as in the accumulators with metal-ceramic and striking electrodes. However, the thermal runaway in nickel-cadmium accumulators with lamellar electrodes is less probable than in the accumulators with metal-ceramic and striking electrodes.

Herein are considered some ways to improve the performance efficiency of sealed batteries of high capacity by providing uniform electrolyte distribution with battery height, increasing active mass utilization coefficient and limiting PCL effect.

It was described a featers of potentiostatic diagnostic method of nickel-oxide electrode active material. A relation between current of nickel-oxide electrode under potentiostatic polarization was found.

Approach to the choice of charge termination criterion of nickel-cadmium accumulators forming cycles is described. The results of accumulators' physical models forming, using chosen criterion are represented. The research shows the effectiveness of prolonged – before voltage regulation – charges during nickel-cadmium accumulators capacity forming due to the considerable decrease in the number of charge-discharge forming cycles and improvement of their discharge characteristics.

Comparative results of the tests of the sealed nickel-cadmium batteries for capacity safety during long-term storage after charging with direct and asymmetric currents are represented. Charging with asymmetric current was carried out in an accelerated manner at average value of the charging current equal to 0.8Crated. Charging with direct current was carried out at average value of the charging current equal to 0. lCrated in accordance with Technical Conditions.

The research results of the sealed nickel-cadmium storage batteries reliability at the rapid charge with asymmetric current are represented. In accordance with the reliability theory postulates, the experimental data of the resource test in the mode of the storage batteries 10NKGZ-1,8-1, 10NKGZ-3,5-l, 10NKGZ-4 cycling.

Work of running double-chamber electrochemical reactor is investigational for an electrosynthesis Ni(OH)2. It is shown that the basic parameter of the mode is a relative current is attitude of current of I toward the theoretical equivalent current of I*, at that fully initial reagents are expended in a reactor. Mode of I/I* = 1 differentiates two areas (I < I* and I > I*) with salutatory and like changing physical and chemical and electrochemical properties Ni(OH)2.

Optimized methods of synthesis and modification of high efficient electrocatalysts for alkaline electrolysers have been described. The results of new electrocatalyst characterization by means of some physico-chemical methods are presented.

Хроника