Mizilevska M. Synthesis, structure and electrochemical properties of nanodispersed anatase / brookite composites

The work is devoted to research of general patterns influence of synthesis condi-tions on the structural, morphological characteristics and photocatalytic properties of nanodispersed titanium dioxide and testing synthesized materials as a basis cathode composition of lithium power sources (LPS).The sol-gel citrate method to obtain of nanodispersed anatase / brookite composite, analysis of hydrolysis processes and stage complexation were developed. The mechanism of nucleation polymorphs of titanium dioxide in the presence of Na+ ions under hydrothermal processing of tetrabutyl titanate hydrolysis. The morphology and particle size of the synthesized material is depends on the pH of the reaction medium and the concentration of Na+ ions in the interlayer space formed of [TiO6] packages. The defects of synthesized titanium dioxide influences its value of bandgap. showed the suitability of the submissions received the use as a photocatalyst competitive. For the first time nanocomposite anatase / brookite was tested as a basis cathode compositions for LPS and thermo expanded graphite was used as the substrate for applying cathodic mixture in the design of LDS. The influence of the specific surface area on the value of specific capacity of LPS been set. The model of the LPS with cathode based on mesoporous maghemite was created and two phases of its work, namely adsorption of lithium on the surface of the interface cathode material/electrolyte and the intercalation of ions Li+ in the crystal structure of the material channels during the discharge was investigated.