| abstract |
Lithium titanium oxide represented by the following formula (1); Zr doped on the lithium titanium oxide; And a lithium titanium-based composite comprising Al sulfur oxide coated on the surface of the lithium titanium oxide, wherein the content of the Al sulfur oxide is 0.4mM to 0.9mM based on 1M of lithium titanium, a negative active material for a secondary battery, and A lithium secondary battery comprising this is presented: [Formula 1] Li x Ti y O z In Formula 1, x, y, and z satisfy 0.1≦x≦4, 1≦y≦5, and 2≦z≦12. |