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The crystallization of the lithium titanate Li4Ti5O12 powders during doping with lanthanum(III) cations is studied. The introduction of up to 4 wt % La(III) does not change the crystalline structure of the material and increases the powder dispersity, which may be due to the formation of structural defects that create microstresses and do not allow the formation of relatively large crystallites. An increase in the content of the introduced lanthanum(III) cations makes it possible to obtain a composite material based on lithium titanate Li4Ti5O12 and solid electrolyte Li0.5La0.5TiO3. Reducing the particle size of the powders during preparation of the modified crystalline powders of lithium titanate Li4Ti5O12 by doping with lanthanum(III) cations and the formation of solid electrolyte-containing composites provides an increase in lithium-ion conductivity. The resulting materials are characterized by high and stable values of the capacity of the battery layout during cycling in the "charge–discharge" mode. [ABSTRACT FROM AUTHOR]

The effect of temperature and the cesium concentration in the external solution on the sorption capacity of titanium phosphate obtained upon the heterogeneous interaction of the (NH4)2TiO(SO4)2 · H2O crystalline salt with phosphoric acid is studied. Sorption on titanium phosphate is shown to be best described by the Langmuir isotherm. When describing the sorption kinetics of solutions, it is necessary to consider both the possibility of diffusion and adsorption limiting the process rate. The use of the chemical kinetic models shows that the stage of chemical interaction of metal ions with functional groups of the sorbent also contributes to the overall rate of the process. [ABSTRACT FROM AUTHOR]