4. A positive electrode active material according to claim 1 or 2, characterized in:
Li-Ni composite oxide particles have an average particle diameter of 1-20 μm, BET specific surface area in the range 0.1-1.6 m2/g.
Li-Ni composite oxide particles
average particle diameter
1-20 μm
μm
Li-Ni composite oxide particles
BET specific surface area
in the range 0.1-1.6 m2/g
m2/g