PARTICULES DE MATÉRIAU ACTIF D'ÉLECTRODE POSITIVE COMPORTANT CHACUNE UN NOYAU CONTENANT UN OXYDE DE COBALT ET DE LITHIUM ET UNE ENVELOPPE CONTENANT UN PHOSPHATE DE COBALT ET DE LITHIUM ET LEUR PROCÉDÉ DE FABRICATION

摘要

Provided is a positive electrode active material particle including a core that includes lithium cobalt oxide represented by the following Chemical Formula 1; and a shell that is located on the surface of the core and includes lithium cobalt phosphate represented by the following Chemical Formula 2, wherein the shell has a tetrahedral phase:        LiCoMOA     (1)wherein M is at least one of Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb, and Ni, A is oxygen-substitutional halogen, and 0.95≤a≤1.05, 0≤x≤0.2, 0≤y≤0.2, and 0≤x+y≤0.2,        LiCoPO     (2)wherein 0≤b≤1.