| abstract |
【Task】 A positive electrode active material that has a small secondary particle size in the positive electrode and can contribute to improving the performance of the positive electrode and a method for producing the same, a precursor of the positive electrode active material, a positive electrode for a lithium secondary battery obtained using the positive electrode active material, A lithium secondary battery comprising the positive electrode for a lithium secondary battery is also provided. [Solution] A positive electrode active material comprising a compound represented by the following formula (I) and having a particle diameter D50 of secondary particles, a BET specific surface area, and a particle disintegration ease A within a specific range, a method for producing the same, and the positive electrode active material A lithium secondary battery comprising a precursor, a positive electrode for a lithium secondary battery obtained using the positive electrode active material, and the positive electrode for the lithium secondary battery. [Chemical 1] [Selection figure] None |