LITHIUM TRANSITION METAL-BASED COMPOUND POWDER, METHOD FOR MANUFACTURING THE SAME, SPRAY-DRIED SUBSTANCE SERVING AS FIRING PRECURSOR THEREOF, AND LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

A lithium transition metal-based compound powder for a lithium secondary battery positive electrode material that can achieve both improvements of load characteristics such as rate and output characteristics and a higher density is a lithium transition metal-based compound powder containing, as a main component, a lithium transition metal-based compound that has a function of allowing elimination and insertion of lithium ions, and including a crystal structure belonging to a layer structure, wherein primary particles are aggregated to form secondary particles, the ratio A/B of a median diameter A of the secondary particles to an average diameter (average primary particle diameter B) is in the range of 8 to 100, and 0.01≰FWHM(110)≰0.5 where FWHM(110) is the half width of a (110) diffraction peak present near a diffraction angle 2θof 64.5° in a powder X-ray diffraction analysis using a CuKαline.