| abstract |
The present invention is a composite of TiO 2-x -TiO 1-x N x (0<x<1) composite coating layer surrounding silicon nanoparticles and having a core-shell structure, and the TiO 2-x - TiO 1-x N x composite coating layer is TiO 2-x (0<x<1) with oxygen deficiency structure and TiO 1-x N x with rock-salt structure (0<x<1) It relates to a negative active material for a secondary battery comprising a, a method for manufacturing the same, and a method for manufacturing a secondary battery using the same. According to the present invention, TiO 2-x to solve the problem of low electrical conductivity of silicon, volume expansion and structural change of silicon that occurs during repeated charging and discharging, as problems caused by silicon while including silicon having a high theoretical capacity. -TiO 1-x N x (0<x<1) High ion/electron conductivity and stable lifespan characteristics can be obtained by applying a coating layer. |