Patent ID: 8795896
Filing Date: 2014-08-05
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A lithium/nickel/cobalt/manganese-containing composite oxide powder represented by the formula Li p Ni x Co y Mn z M q O 2-a F a wherein M is at least one element selected from the group consisting of A1, Ge, Sn, alkaline earth metal elements and transition metal elements other than Co, Mn and Ni, 0.9≦p≦1.1, 0.2≦x≦0.5, 0.2≦y≦0.5, 0.1≦z≦0.4, 0≦q≦0.5, 1.9≦a≦2.1, p+x+y+z+q=2, and 0≦a≦0.02, characterized in that when the powder is classified into small particle size-classified particles with an average particle size of 2 μm≦D a ratio of % by weight of the small particle size-classified particles compared to a % by weight of the large particle size-classified particles is from 15/85 to 40/60, a molar ratio ps of lithium to the total of nickel, cobalt, manganese and the M element contained in the small particle size-classified particles is smaller than a molar ratio pl of lithium to the total of nickel, cobalt, manganese and the M element contained in the large particle size-classified particles and wherein 0.95≦ps≦1.04, 1.03≦pl≦1.12, 0.85<ps/pl<1.