Electrochemical features of combustion-synthesized lithium cobaltate as cathode material for lithium ion battery

Lithium cobaltate (LiCoO₂) was produced by carbon combustion synthesis of oxide (CCSO) using carbon nanoparticles as a fuel. In this method, the exothermic oxidation of carbon nanoparticles with an average size of 5 nm (specific surface 80 m²/g) gives rise to a self-propagating thermal wave with maximum temperatures of up to 900°C. The thermal front rapidly propagates through the mixture of solid reactants converting it to lithium cobaltate. XRD data suggest that the as-synthesized products were single phase. Carbon is not incorporated in the product and is evolved from the reaction zone as gaseous CO₂. Thermogravimetric analysis was used to identify the features of interaction in the LiNO₃-Co₃O₄-C system. The key features affecting the process-carbon pre-concentration in the reacting mixture and oxygen infiltration to the reaction zone-led to the formation of layered structure of LiCoO₂ and affected the particle sizes. The synthesized crystalline nanoparticles were nearly spherical, and their average particle diameters ranged between 60 and 200 nm.     

Development of a Method for Reprocessing Technogenic Lead Production Raw Materials to Extract Rhenium and Arsenic

Metallurgist - The results of an experimental study into the reduction smelting of rhenium-containing cyclone dust obtained from lead production are presented. The optimal dust processing modes...