The present invention relates to a negative electrode active material material for a lithium secondary battery, specifically, a negative electrode active material material made in an alloy state by inserting a lithium metal in advance into silicon particles, graphite, silicon oxide, or other negative electrode active material, and a method of manufacturing the same, and It relates to a manufactured lithium-ion battery.
In addition, the moment the negative electrode active material, which has been inserted into the negative electrode material through heat treatment in a vacuum atmosphere, is taken out into the air, it reacts with moisture and oxygen in the air, so that no flame is generated.