Li-Ni COMPOSITE OXIDE PARTICLE POWDER AND METHOD FOR MANUFACTURING SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

The present invention relates to a Li-Ni composite oxide particle powder and a method for manufacturing same, the powder having high initial discharge capacity when used as a positive-electrode active substance for a nonaqueous electrolyte secondary cell or the like, and having excellent heat stability, the Li-Ni composite oxide particle powder being a Li-Ni composite oxide having the powder composition LixNi1-y-a-bCoyM1aM2bO2 (1.00 ≤ x ≤ 1.10, 0 < y ≤ 0.25, 0 < a ≤ 0.25, 0 ≤ b ≤ 0.10, M1 being Al and/or Mn, M2 being Zr and/or Mg), the Li-Ni composite oxide particle powder being characterized in that the product of the metal occupancy rate (%) for the lithium site obtained on the basis of Rietveld analysis of X-ray diffraction, and the crystallite size (nm) obtained on the basis of the Rietveld analysis, is 700-1400.