| abstract |
The present invention relates to a precursor of a positive electrode active material for a secondary battery and a positive electrode active material prepared by using the precursor, wherein the precursor comprises a single-layer structured secondary particle in which the particles are The columnar primary particles oriented radially from the center to the surface are aggregated, and the secondary particles have a shell shape; the primary particles comprise the composite metal hydroxide of Ni-Co-Mn of the following chemical formula 1: [chemical formula 1] Ni 1- (x+y+z) Co x My M z (OH) 2 wherein, in Chemical Formula 1, M, x, y and z have the same definitions as in the specification. |