Disclosed is a cathode active material having a core-shell structure. The core-shell cathode
active material includes a core including a lithium transition metal oxide with excellent
electrochemical properties and a shell formed by coating the surface of the core with a
transition metal oxide. The formation of the shell by coating a transition metal oxide on the
surface of the core comprising a lithium transition metal oxide prevents the structure of the
lithium transition metal oxide from collapsing and inhibits the dissolution of manganese ions …