Pidgorna K. Technological foundations of high-energy processes of (Al+LiMn2O4) composite coatings formation on cathodes in electric accumulators.

The thesis features determination of interconnections between the structure and properties of cathode composite coatings in electric accumulators obtained by improved high-energy processes. Composite (Al+LіMn2O4) microparticles formed in counter current supersonic flows were obtained, studied and subsequently used as active material of positive electrodes in chemical power cells. The average sizes of active particles on the composite surface were decreased by a factor of 40, which allowed increasing specific surface area of the particles. The influence caused by peculiarities of high-energy impact formation process of (Al+LіМn2O4) composite coatings was established. The optimal operating distance between the muzzle and the substrate was determined as well as the temperature of gas bearer. These parameters allowed obtaining maximum thickness of active layer while unit weight remained at acceptable level. It has been found that cathode materials obtained by high-energy impact method have high capacity, discharge rate, and cycling life.