Cathode active material for secondary batteries

Abstract

Disclosed is a cathode active material represented by the following Formula 1, the cathode active material being in the form of a solid solution or a composite, and a secondary battery including the cathode active material. wLi2MO3*xLiM′O2*yLiM″2O4*zLi3PO4  (1) wherein 0<w<1, 0<x<1, 0<y<0.3, 0<z<0.1 and w+x+y+z=1 are satisfied, M is at least one element selected from first or second period transition metals having a mean oxidation number of +4, M′ is at least one element selected from first or second period transition metals having a mean oxidation number of +3, and M″ is at least one element selected from first to fourth period transition metals having a combination of mean oxidation numbers of +3 and +4.

Dependencies are inferred from the claim text.