Li-Ni composite oxide particles for non-aqueous electrolyte secondary battery, process for producing the same, and non-aqueous electrolyte secondary battery

Li—Ni composite oxide particles for a non-aqueous electrolyte secondary battery, comprising a Li—Ni composite oxide whose secondary particles form core particles thereof and have a composition represented by the formula:

• Lix1Ni1-y1-z1-w1Coy1Mnz1Mw1O2-v1Kv1
• in which 0.9≦x1≦1.3;
• 0.1≦y1≦0.3;
• 0.0≦z1≦0.3;
• 0.05≦w1<0.1;
• 0≦v1≦0.05;
• M is Al;
• and K is at least one anion selected from the group consisting of F− and PO43−,
• wherein a Li—Ni composite oxide having a composition represented by the formula:
• Lix2Ni1-y2-z2-w2Coy2Mnz2Mw2O2-v2Kv2
• in which 0.9≦x2≦1+z2;
• 0≦y2≦0.33;
• 0≦z2≦0.5;
• 0≦w2≦0.1;
• and 0≦v2≦0.05, with the proviso that 0.5≦(1−y2−z2−w2)/(y2+z2+w2), 0.3≦(z1+z2) and 0<(z2−z1)≦0.5);
• M is at least one metal selected from the group consisting of Al, Fe, Mg, Zr and Ti;
• and K is at least one anion selected from the group consisting of F− and PO43−,
• is coated or present on a surface of the respective secondary particles.

Li—Ni composite oxide particles for a non-aqueous electrolyte secondary battery, comprising a Li—Ni composite oxide whose secondary particles form core particles thereof and have a composition represented by the formula:

• Lix1Ni1-y1-z1-w1Coy1Mnz1Mw1O2-v1Kv1
• (in which 1.0<x1≦1.3;
• 0.1≦y1≦0.3;
• 0.0≦z1≦0.3;
• 0≦w1<0.1;
• 0<v1≦0.05;
• M is at least one metal selected from the group consisting of Al and Fe;
• and K is at least one anion selected from the group consisting of F− and PO43−),
• wherein a Li—Ni composite oxide having a metal mol number of (x1−1) and a composition represented by the formula:
• Lix2Ni1-y2-z2-w2Coy2Mnz2Mw2O2-v2Kv2
• in which 0≦y2≦0.33;
• 0≦z2≦0.5;
• 0≦w2≦0.1;
• and 0≦v2≦0.05, with the proviso that 0.5≦(1−y2−z2−w2)/(y2+z2+w2), 0.3≦(z1+z2) and 0<(z2−z1)≦0.5;
• M is A;
• and K is at least one anion selected from the group consisting of F− and PO43−,
• is coated or present on a surface of the respective secondary particles.