LITHIUM TRANSITION METAL-TYPE COMPOUND POWDER, PROCESS FOR PRODUCING THE LITHIUM TRANSITION METAL-TYPE COMPOUND POWDER, SPRAY DRIED PRODUCT AS FIRING PRECURSOR FOR THE LITHIUM TRANSITION METAL-TYPE COMPOUND POWDER, AND POSITIVE ELECTRODE FOR LITHIUM RECHARGEABLE BATTERY AND LITHIUM RECHARGEABLE BATTERY USING THE LITHIUM TRA

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 2¸ of 64.5° in a powder X-ray diffraction analysis using a CuK± line.