More particularly, it relates to a spinel cathode active material, in which a shell portion formed on the outer surface of Li1+a2O4 {HEAD ~ yAy} showing the 4V grade potential consists of a composition in which the dissolution of {TAIL ~ manganese} does not occur, and thus the inner, outer and intermediate layers of the cathode active material have different transition metal composition distributions 
More particularly , it relates to a spinel cathode active material , in which a shell portion formed on the outer surface of Li1+a2O4 { HEAD ~ yAy } showing the 4V grade potential consists of a composition in which the dissolution of { TAIL ~ manganese } does not occur , and thus the inner , outer and intermediate layers of the cathode active material have different transition metal composition distributions
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH