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