| 摘要 |
The present invention relates to an anode active material for a lithium rechargeable battery, and more specifically relates to an anode active material for a lithium rechargeable battery wherein the anode active material comprises a core part exhibiting gradients in nickel, manganese and cobalt concentrations in the core-to-surface direction, and a shell part wherein the nickel, manganese and cobalt concentrations are constant and the nickel concentration is adjusted so as to be in a predetermined range. In the anode active material according to the present invention, because the shell part, wherein the nickel concentration is adjusted so as to be in a predetermined range and the remaining metal concentrations are constant, is formed on the surface of the core part having the gradients in nickel, manganese and cobalt concentrations, it follows that even though the nickel concentration is high the residual lithium is reduced, and the lifespan characteristics and charging and discharging characteristics are outstanding and high capacity is exhibited while even so the crystal structure is stabilised such that structural stability is exhibited even when used at high voltage. |
