abstract |
The present invention relates to: an anode active material for a lithium secondary battery, capable of exhibiting excellent initial efficiency and lifespan characteristics since the anode active material comprises silicon-based particles represented by M-SiO x (M is Li, Mg, Ca, Al or Ti, and 0≤x<2), wherein the M-SiO x comprises 20-70 wt% of an amorphous phase; and a preparation method therefor. |