A anode active material for a lithium ion battery, a method for manufacturing the same, a anode for a lithium ion battery comprising the anode active material and a lithium ion battery comprising the anode

摘要

The present invention relates to a negative electrode active material for a lithium ion battery, a method for manufacturing the same, a negative electrode for a lithium ion battery including the negative electrode active material, and a lithium ion battery including the negative electrode, and more particularly, to a silicone oil that does not contain a phenyl group By preparing a negative active material containing silicon oxycarbide by mixing a phenyl group-containing carbon precursor in an optimal ratio, it is economical by reducing manufacturing cost, and it is possible to improve electronic conductivity and reversible capacity by controlling the free carbon region. In addition, mechanical rigidity and physical stability can be improved by heat treatment in two steps, and when the composition and free carbon region in the silicon oxycarbide structure are optimized and applied to the anode, the capacity, coulombic efficiency, lifespan and output characteristics of the battery can be improved. can be significantly improved.