Porous silicon based electrode active material and secondary battery comprising the same

摘要

The present invention relates to a porous silicon-based electrode active material and a secondary battery including the porous silicon-based electrode active material, and more particularly to a porous silicon-based electrode active material having a silicon phase; SiO _x (0 x 2) phase; And a silicon dioxide phase, and having a porosity of 7 to 71%, and a secondary battery comprising the porous silicon-based electrode active material.