Cobalt oxide for lithium secondary battery preparing method thereof lithium cobalt oxide formed therefrom and lithium secondary battery including positive electrode comprising the lithium cobalt oxide

摘要

The present invention provides a cobalt oxide (Co_3O_4) for a lithium secondary battery having an improved density, a manufacturing method thereof, a lithium cobalt oxide formed from the cobalt oxide, and a lithium secondary battery including a positive electrode including the same. The cobalt oxide for a lithium secondary battery has an intensity ratio of a second peak with 2θ of 31.3±1° with respect to a first peak with 2θ of 19±1° in an X-ray diffraction analysis, which is 0.8 to 1.2, and has a tap density of 2.8 to 3.0 g/cc.