8. The positive electrode active material for a secondary battery of claim 7, wherein the positive electrode active material has an average particle diameter of 7 μm to 15 μm and a BET specific surface area of 0.1 m2/g to 1.0 m2/g.
positive electrode active material
average particle diameter
7 μm to 15 μm
μm
positive electrode active material
BET specific surface area
0.1 m2/g to 1.0 m2/g
m2/g