Methods for manufacturing active materials, positive electrode active materials for non-aqueous electrolyte secondary batteries, electrode mixtures, batteries, and active materials.

Abstract

This invention relates to an active material having a core and a coating portion on the surface of the core. The core comprises a spinel-type composite oxide containing Li, Ni, Mn, and Ti. The molar ratio Ti / (Li+Ni+Mn+Ti) in the core is 0.05 to 0.15. The coating portion comprises Al oxide. The Al content in the active material is 0.020% by mass to 0.100% by mass. The specific surface area of ​​the active material is 0.5 m² / g to 2.0 m² / g. In the X-ray diffraction pattern of the active material, when the peak intensity observed at 2θ = 44.2 ± 0.5° is denoted as IA, and the peak intensity observed at 2θ = 18.7 ± 0.5° is denoted as IB, the ratio IA / IB is 0.30 to 0.46.