ИСТИНА

Hydrothermal reaction techniques have been successfully applied in commercial usage since the 20th century. Water action at elevated temperature and pressure conditions, occurring in formation of various rocks and minerals in the earth’s crust, is widely used in synthesis of single crystals or nanomaterials for different applications. There are extensive possibilities of controlling the morphology, crystal structure and functional properties of materials by varying synthesis conditions. Triphiline-type cathode materials are essential for the actual battery market with improved safety, costs and service life. As representative, lithium iron phosphate is the most commercially advanced material, so technology improvement is actual issue affected by developers. One-dimensional diffusion activity of LiFePO4 makes it challengeable for obtaining the materials with competitive electrochemical properties. Finding the most convenient conditions for forming required crystal structure and morphology is the key for successful material design. We found an opportunity to reduce the cost and simplify synthesis process by using transition metal oxide (Fe2O3) as raw iron-containing reagent during the hydrothermal synthesis. Synthesis conditions are highly affected to the phase composition, crystal structure and morphology of the produced material. We researched the evolution of properties of the materials by changing the amounts of reagents, temperatures, prolongation, reaction medium and using additives. The work was carried out with the financial support of the Russian Science Foundation, grant 24-13-00107.