Lithium secondary battery

Abstract

Lithium secondary battery comprising: a positive electrode, a separator and a negative electrode, wherein the positive electrode comprises an active material of the positive electrode and a conductive material of the positive electrode, the negative electrode comprises an active material of the negative electrode and a conductive material of the negative electrode, the active material of the positive electrode comprises a lithium composite transition metal compound containing nickel (Ni) and cobalt (Co), the active material of the negative electrode comprises silicon oxide, synthetic graphite and natural graphite, the conductive material of the positive electrode comprises a particle conductive material, a linear conductive material, a planar conductive material, and the conductive material of the negative electrode comprises a particle conductive material, a linear conductive material and a planar conductive material.