| abstract |
The present invention relates to a core-shell composite particle, wherein the core is a porous carbon-based matrix containing silicon particles, wherein the silicon particles are contained within the pores of the matrix and the pores containing the silicon particles are & (Measurement method: Scanning Electron Microscope (SEM)), and the shell is formed by carbonization of at least one carbon precursor selected from the group consisting of tar, pitch, hard carbon, soft carbon and hydrocarbons having 1 to 20 carbon atoms Shell composite particles, characterized in that the shell is a non-porous shell. |