5. The precursor of a positive electrode active material for a secondary battery of claim 1, wherein the precursor has an average particle diameter (D50) of 7 μm to 20 μm and a BET specific surface area of 5.0 m2/g to 30.0 m2/g.
precursor
average particle diameter (D50
7 μm to 20 μm
μm
precursor
BET specific surface area
5.0 m2/g to 30.0 m2/g
m2/g