| abstract |
The present invention relates to a lithium secondary battery, and more particularly, to a lithium secondary battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein at least one of the metals has a lithium-metal oxide having a concentration gradient region between the central portion and the surface portion It includes a positive electrode active material, wherein the negative electrode includes a negative electrode active material including graphite having an interplanar spacing d002 of 3.356 to 3.365 Å, and thus relates to a lithium secondary battery having excellent high temperature storage characteristics and lifespan characteristics. |