Lithium transition metal oxide, positive electrode additive for lithium secondary battery, and lithium secondary battery comprising the same

Abstract

A lithium transition metal oxide, which is a lithium cobalt oxide containing a hetero-element, is capable of minimizing a side reaction with an electrolyte, thereby suppressing the generation of gas during charging and discharging of a lithium secondary battery is provided. The hetero-element includes a 4th period transition metal; and at least one selected from the group consisting of a group 2 element, a group 13 element, a group 14 element, a 5th period transition metal, and a 6th period transition metal. A positive electrode additive for a lithium secondary battery, and a lithium secondary battery are also provided.

Dependencies are inferred from the claim text.