| abstract |
The present invention, a core portion comprising a first lithium transition metal oxide; and a shell portion formed on the core portion and including a second lithium transition metal oxide having a composition different from that of the first lithium transition metal oxide; and a core-shell structure lithium transition metal oxide comprising a, and the core-shell structure Formed on the surface of the lithium transition metal oxide of Al, B, W, Nb, and a coating layer comprising at least one coating element selected from the group consisting of Co, the shell portion is a surface in which the coating element is mixed A positive electrode active material comprising a doped portion, wherein the surface doped portion is present in a region at a distance of 30 nm or less from the outermost surface of the positive electrode active material and a method for manufacturing the same. |