NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE COMPRISING THE NEGATIVE ELECTRODE ACTIVE MATERIAL, LITHIUM SECONDARTY BATTERY COMPRISING THE NEGATIVE ELECTRODE, AND METHOD FOR PREPAREING THE NEGATIVE ELECTRODE ACTIVE MATERIAL

摘要

The invention M _a Si _b C matrix metal containing-silicon-comprising a carbon-based particles, wherein M _a Si _b C matrix of M is Li, Mg, Na, 1 or more kinds selected from the group consisting of Ca and Al and, 0.3≤a≤1, 1≤b≤2 which relates to a negative active material, M _a Si _b C in cell during charging and discharging by a matrix ratio can be minimized reverse phase occurs, the initial efficiency of the battery can be improved and electrical conductivity, physical strength, and chemical stability may be improved to improve the capacity and lifespan characteristics of the battery.