Li-Ni COMPLEX OXIDE PARTICLE POWDER AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

The present invention relates to Li-Ni composite oxide particles having a composition of Li x (Ni y Co 2(1-y)/5 Mn 3(1-y)/5 ) 1-z M z O 2 wherein x, y and z represent 1.00 ‰¤ x ‰¤ 1.10; 0.65 < y < 0.82; and 0 ‰¤ z < 0.05, respectively; and M is at least one element selected from the group consisting of Al, Zr and Mg. The Li-Ni composite oxide particles of the present invention exhibit a high initial discharge capacity and are excellent in first-cycle charge/discharge efficiency when used as a positive electrode active substance for non-aqueous electrolyte secondary batteries.