Patent ID: 11495794

Abstract:
A negative electrode active material for a lithium secondary battery which includes a silicon oxide-based composite represented by M-SiOx (wherein 0<x≤2, and M is Li or Mg), artificial graphite and spheroidized natural graphite; the spheroidized natural graphite is present in an amount of 5 wt % to 15 wt % based on the combined weight of the silicon oxide-based composite, artificial graphite and the spheroidized natural graphite; the spheroidized natural graphite has a tap density of 0.9 g/cc or more; and the total content of N, O and H impurities in the spheroidized natural graphite is 200 ppm to 1000 ppm based on 0.1 g of the spheroidized natural graphite. A lithium secondary battery including the negative electrode active material is also provided. The lithium secondary battery shows improved adhesion between the negative electrode active material layer and the current collector, and provides improved battery performance.