The invention belongs to the technical field of
lithium ion batteries, and discloses a
single crystal ternary positive
electrode material and a preparation method and application thereof, the
chemical formula of the
single crystal ternary positive
electrode material is LiNixCoyMnzM (1-x-y-z) Oc (at) LiaNdOb, 0 < x < = 0.65, 0 < y < = 0.15, 0 < z < = 0.35, 0 < a < = 6, 0 < b < = 4, 1 < c < = 2, and 1 < = d < 2; m and N are at least one of Zr, Ni, Al, Cu, Co, Sr, Mn, Y, Ti, Mg, Mo, B, Sn, Fe, Zn, Si or W. The single-
crystal ternary positive
electrode material disclosed by the invention is a single-
crystal material with a core-shell structure, and is low in surface residual
lithium, stable in internal and external structures, high in
energy density and excellent in cycle performance and dynamic performance.