| abstract |
The present invention includes a negative active material layer, the negative active material layer includes a negative active material and a conductive material, the negative active material includes SiO x (0≦x<2) particles, and the conductive material is one graphene sheet Secondary particles in which a portion of the graphene is connected to a portion of the adjacent graphene sheet; And a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, wherein the oxygen content of the secondary particles is 1% to 10% by weight based on the total weight of the secondary particles. , The specific surface area of the secondary particles measured by the nitrogen adsorption BET method is 500m 2 /g to 1100m 2 /g, the carbon nanotube structure is a negative electrode contained in an amount of 0.01% to 1.0% by weight in the negative active material layer, and It relates to a secondary battery including this. |