| abstract |
The present invention relates to a lithium secondary battery including: a positive electrode including a positive electrode active material represented by Chemical Formula 1, a plate-shaped conductive agent, and a spherical conductive agent; a negative electrode including a negative electrode active material; and an electrolytic liquid, wherein the positive electrode has a W value defined by Equation 1 of 1.0 to 1.5. [Chemical formula 1] Li a Ni x Co y Me z O 2 In chemical formula 1, 0.9≤a≤1.1, 0.5≤x≤0.90, 0.05≤y≤0.5, 0.01≤z≤0.5, x+y+z=1 , and Me is Mn or Al. |