SiOC ANODE MATERIAL FOR LITHIUM ION BATTERY FROM CARBOSILANE POLYMER AND METHOD FOR MANUFACTURING THE SAME

摘要

The present invention relates to (i) an oxidation reaction step of oxidizing a carbosilane-based polymer; And (ii) a thermal decomposition reaction step of heat-treating the oxidized carbosilane-based polymer, and a negative electrode active material prepared thereby, a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same will be. According to the present invention, in the production of an anode active material for lithium secondary batteries using a carbosilane-based polymer, the content of each element of silicon, oxygen, and carbon is controlled by an efficient method through the oxidation step and the heat treatment step, An anode active material for a lithium secondary battery capable of exhibiting a high lithium capacity and a stable charging / discharging behavior can be produced.