Negative electrode active material and lithium secondary battery comprising the same

A method for manufacturing a negative electrode active material for a secondary battery, comprising:

• (a) mixing a lithium precursor, a titanium precursor and a zirconium precursor to prepare a precursor mixture;
• (b) thermally treating the precursor mixture at a temperature ranging from 700° C. to 1,100° C. to obtain a lithium titanium oxide;
• and
• (c) mixing the lithium titanium oxide obtained after the thermal treatment with an aluminum and sulfur containing compound and thermally treating the mixture at a temperature ranging from 400° C. to 500° C. to obtain lithium titanium-based composite particles,
• wherein the lithium titanium-based composite particles comprise at least one of primary particles or secondary particles formed by agglomeration of the primary particles, and
• an average particle size (D50) of the primary particles of the lithium titanium-based composite particles is 550 nm to 1.1 μm, and the aluminum and sulfur containing compound comprises Al2(SO4)3.