A suppressing peeling of the carbonaceous coating film covering the surface of the primary particles of the positive electrode active material, while ensuring electronic conductivity, the positive electrode material for a lithium ion secondary battery capable of improving the positive electrode density, the lithium ion providing a lithium ion secondary battery including the lithium ion secondary battery positive electrode and the positive electrode for the lithium ion secondary battery containing a positive electrode material for a secondary battery.
A positive electrode material for a lithium ion secondary battery of the present invention have the general formula _{Li x A y D z PO 4} (0.9 <x <1.1,0 <y ≦ 1,0 ≦ z <1, 0.9 <y + z <1.1, provided that at least one A is that Co, Mn, Ni, Fe, is selected from the group consisting of Cu and Cr, D is Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, in, Si, Ge, active material particles containing a carbonaceous coating covering the central particles represented by at least one) selected from the group consisting of Sc and Y, the surface of said central particle a is, coarse ratio of the particle size distribution is less than 35% and 65%.
.BACKGROUND