| abstract |
The present invention, when used as a positive electrode active material of a lithium secondary battery, particularly lithium cobalt-based composite oxide powder that can improve the cycle characteristics of a lithium secondary battery, its industrially advantageous manufacturing method, a lithium secondary battery positive electrode containing the same Provided is a lithium secondary battery having excellent cycle characteristics using the active material and the positive electrode active material. The lithium cobalt-based composite oxide powder of the present invention contains 0.025 to 1.0 wt% of at least one metal atom selected from Mg, Al, Zr, Ca, and Ti, and contains a lithium compound, a cobalt compound, and a phosphate and phosphoric acid of the metal. Characterized by mixing a compound containing a metal atom selected from a hydrogen salt and firing the mixture.n n n n Lithium secondary battery, positive electrode active material, lithium cobalt-based composite oxide, cycle characteristics |