| abstract |
PROBLEM TO BE SOLVED: To provide a lithium composite compound particle powder having good high-temperature storage characteristics and excellent cycle characteristics as an active material for a nonaqueous electrolyte secondary battery, and a secondary battery using the lithium composite compound particle powder. The BET specific surface area is 0.05 to 0.8 m 2 / g, the atomic ratio (Ma / Ni) between the concentration of amphoteric metal and the concentration of Ni on the outermost surface of the particles is 2 to 6, And the density | concentration of the amphoteric metal in the outermost surface of particle | grains is Li-Ni complex oxide powder for nonaqueous electrolyte secondary batteries higher than the density | concentration of the amphoteric metal in the position of 50 nm toward the center direction from the outermost surface of particle | grains. [Selection figure] None |