| abstract |
In the present invention, silicon oxide-based composites, artificial graphite and spherical forms include silicon oxide-based composites, artificial graphite and spherical natural graphite represented by M-SiOx (0 <x ≤ 2, M is Li or Mg) The spherical natural graphite is included in the range of 5% by weight to 15% by weight based on the total weight of the naturalized graphite, and the spherical natural graphite has a tap density of 0.9 g / cc or more. The total amount of N, O, and H impurities in the spherical natural graphite is in the range of 200 ppm to 1000 ppm, based on 0.1 g of the spherical natural graphite, and a lithium secondary battery including the same. The adhesion between the negative electrode active material layer and the current collector is improved and improved battery performance is possible. |