| 摘要 |
Provided are a positive electrode active material for nonagueous secondary batteries, the material having a narrow particle-size distribution and a monodisperse property and being capable of increasing a battery capacity; an industrial production method thereof; and a nonaqueous secondary battery using the positive electrode active material and having excellent electrical characteristics. The positive electrode active material is represented by a general formula: Li1+uNixCoyMnzMtO2+α(wherein, 0.05≰u≰0.95, x+y+z+t=1, 0≰x≰0.5, 0≰y≰0.5, 0.5≰z<0.8, 0≰t≰0.1, and M is an additive element and at least one element selected from Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, and W), has an average particle diameter of 3 to 12 um, and has [(d90−d10)/average particle diameter], an index indicating a scale of particle-size distribution, of 0.60 or less. |
