Patent ID: 9748570
Date: 2017-08-29
CPC Classifications: C01G,H01M,Y02E

Claim:
1. A lithium metal oxide powder for use as a cathode material in a rechargeable battery, having a general formula Li a Ni x Co y Mn z M′ m O 2±e A f , with 0.9<a<1.1, 0.2≦x≦0.9, 0<y≦0.4, 0<z≦0.7, m=0, e<0.02, f=0 and 0.9<(x+y+z+m+f)<1.1; M′ comprising one or more elements selected from the group consisting of Al, Mg, Ti, Cr, V, Fe and Ga; A comprising one or more elements selected from the group consisting of F, C, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn; the powder having a particle size distribution defining a D10 and a D90; and wherein either x1−x2≧0.005; or z2−z1≧0.005; or both x1−x2≧0.005 and z2−z1>0.005; x1 and z1 being the values of x and z of particles having a particle size D90; and x2 and z2 being the values of x and z of particles having a particle size D10, and wherein −0.005≦y1−y2≦0.005, y1 being the value of y of particles having a particle size D90; and y2 being the value of y of particles having a particle size D10, and one of a) 0.30≦x≦0.40, 0.30≦y≦0.35 and 0.25≦z≦0.35; b) 0.45≦x≦0.55, 0.15≦y≦0.25 and 0.25≦z≦0.35; c) 0.60≦x≦0.70, 0.10≦y≦0.20 and 0.20≦z≦0.30; and d) 0.20≦x≦0.30, 0.05≦y≦0.15 and 0.60≦z≦0.70.