METHOD OF PRODUCING PARTICLES OF SOLID ELECTROLYTE LiAlTi(PO) (0,1≤x≤0,5) Russian patent published in 2013 - IPC H01M10/56 H01M10/562 H01G9/25 H01G11/56 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing particles of a solid electrolyte Li_1+xAl_xTi₂._x(PO₄)₃ (0.1≤x≤0.5), which involves mixing a first solution containing nitric acid, water, lithium nitrate, aluminium nitrate, ammonium phosphate NH₄H₂PO₄ or phosphoric acid, and a second solution containing a titanium compound and a solvent, to form a collective nitrate solution, heating the collective solution to obtain a precursor and calcination thereof. The solvent used in the second solution is hydrogen peroxide and the titanium compound is a titanium peroxide complex; nitric acid is further added to the second solution to keep pH of the collective solution not higher than 2; the collective solution is heated at 150-170°C to decompose the titanium peroxide complex and obtain an amorphous precursor, and the precursor is calcined at 600-800°C. The method enables to synthesise electrolyte particles with size of 215-280 nm, and the solid electrolyte obtained from said particles is monophase and has ion conductivity of up to 6.3·10^-4 S/cm at room temperature.

EFFECT: method has low power consumption and high environmental friendliness.

3 cl, 3 ex