Solid-state electrolytes for lithium batteries and process for production thereof

Abstract

A method for preparing a lithium titanium phosphate, wherein a sol-gel process is used to prepare the phosphate, includes producing a sol from source materials; converting the sol to a gel; and drying the gel to obtain a corresponding powder comprising the lithium titanium phosphate. In a substep, the method further includes adding titanium(IV) isopropoxide to water to produce precipitates of titanium hydroxide oxide, cooling a system down to a temperature of less than 10° C., and redissolving the precipitates by adding nitric acid to form an aqueous TiO2+ nitrate solution. The lithium titanium phosphate has a general composition Li1+x+yMxTi2−x(PO4)3−y(SiO4)y, wherein M=Al, Ga, In, Sc, V, Cr, Mn, Co, Fe, Y, La-Lu, wherein 0≦x≦0.5, and wherein 0≦y≦0.5.

Dependencies are inferred from the claim text.