Patent ID: 10944105

Abstract:
The present invention provides a positive electrode active material includes a first lithium transition metal oxide represented by formula Lia(NibCocMnd)1-eMeO2 or Lia(NibCocAld)1-eM′eO2, wherein 0.9<a<1.1, 0.6≤b<0.9, 0.1≤c<0.4, 0.05≤d<0.4, 0≤e≤0.1, b+c+d=1, M is at least one of Al, Mg, Ti, Zr, M′ is at least one of Mg, Ti, Zr, and a second lithium transition metal oxide represented by formula LixNiyCozM″sO2, wherein 0.9<x<1.1, 0.4≤y<0.6, 0.2≤z<0.5, 0.2≤s<0.5, y+z+s=1, M″ is at least one of Mn, Al, Mg, Ti, Zr, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Nb, Mo, Sr, Sb, W, Bi. The positive electrode active material for a lithium ion battery of the present invention shows a high compacted density. The present invention also provides a lithium ion battery using the positive electrode active material of the present invention. The lithium ion battery has high gram capacity, high energy density, good storage performance, and good cycle stability.