| 摘要 |
Provided are a positive electrode active material for nonaqueous 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: Li 1+u Ni x Co y Mn z M t O 2-± (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 [(d 90 -d 10 ) /average particle diameter], an index indicating a scale of particle-size distribution, of 0.60 or less. (150 word) |
