9. The positive electrode active material for a secondary battery according to claim 8, having an average particle diameter of 7 to 15 μm and 0.1m2G to 1.0m2BET specific surface area in g.
positive electrode active material
average particle diameter
7 to 15 μm
μm
positive electrode active material
BET specific surface area
0.1m2G to 1.0m2