Patent ID: 8530095

Claim:
A negative active material for a lithium rechargeable battery, the negative active material comprising a lithium titanium oxide having a full width at half maximum at a (111) plane of about 0.08054° to about 0.10067° as measured by X-ray diffraction using a Cu Kα ray, wherein the lithium titanium oxide has an average crystal size of about 800 Å to about 1000 Å, and the lithium titanium oxide comprises an oxide represented by Chemical Formula 1: Li 4-x-y M y Ti 5+x-z M′ z O 12 Chemical Formula 1 wherein: M is selected from the group consisting of La, Tb, Gd, Ce, Pr, Nd, Sm, Ba, Sr, Ca, Mg, and combinations thereof; M′ is selected from the grow consisting of V, Cr, Nb, Fe, Ni, Co, Mn, W, Al, Ga, Cu, Mo, P, and combinations thereof; and x is 0 to 1, y is 0 to 1, and z is 0 to 1, and at least one of x or y or z is greater than 0 and less than or equal to 1.