Lithium Secondary Battery

A lithium secondary battery includes: a positive electrode; a separator; and a negative electrode. The positive electrode includes a positive electrode active material and a positive electrode conductive material. The negative electrode includes a negative electrode active material and a negative electrode conductive material. The positive electrode active material includes a lithium composite transition metal compound including nickel (Ni) and cobalt (Co), and the negative electrode active material includes silicon oxide, artificial graphite, and natural graphite. The positive electrode conductive material includes a particulate conductive material, a linear conductive material, and a planar conductive material, and the negative electrode conductive material includes a particulate conductive material, a linear conductive material, and a planar conductive material.