US 8,795,896 B2Granted

Lithium-containing composite oxide and its production method

AssigneeAGC Seimi Chemical Co., Ltd.

InventorsTakeshi Kawasato, Takuya Mihara, Koichiro Ueda, Yukimitsu Wakasugi, Nozomi Honda

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Abstract

A lithium/nickel/cobalt/manganese-containing composite oxide powder represented by the formula LipNixCoyMnzMqO2-aFa (wherein M is at least one element selected from the group consisting of Al, 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 2 μm≦D50≦8 μm and large particle size-classified particles with an average particle size of 10 μm≦D50≦75 μm, the ratio of (% by weight of the small particle size-classified particles)/(% by weight of the large particle size-classified particles) is from 15/85 to 40/60.

Claims21

Dependent claims

A lithium/nickel/cobalt/manganese-containing composite oxide powder represented by the formula LipNixCoyMnzMqO2-aFa 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≦D50≦8 μm and large particle size-classified particles with an average particle size of 10 μm≦D50≦75 μm,
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.

A lithium/nickel/cobalt/manganese composite oxide powder having the formula LipNixCoyMnzMqO2-aFa, wherein M is at least one element selected from the group consisting of Al, Ge, Sn, an alkaline earth metal element and a transition metal element other than Co, Mn and Ni,

wherein 0.9≦p≦1.1, 0.2≦x≦0.5, 0.2≦y≦0.5, 0.1≦z≦0.4, 0≦q≦0.05, 1.9≦2-a≦2.1, p+x+y+z+q=2,and 0≦a≦0.02,
wherein the composite oxide powder comprises a small particle size particle having an average particle size of 2 μm≦D50≦8 μm and a large particle size particle having an average particle size of 10 μm≦D50≦25 μm,
wherein the weight percent ratio of the small particle size particle to the large particle size particle is from 15/85 to 40/60, and
wherein the molar ratio of Li to the total molar amount of Ni, Co, Mn and the M element in the small size particle is less than the molar ratio of Li to the total molar amount of Ni, Co, Mn and the M element in the large particle.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/486,799Filed 18 Jun 2009 · continuation
Priority: JP 2007-16410721 Jun 2007
Published: US 2009/0258296 A115 Oct 2009
Granted: 5 Aug 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification25 codes

H01M 4/36
Electrodes composed of, or comprising, active material: selection of substances as active materials, active masses, active liquids
C01G 45/1228
Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof: of the type -, e.g. LiMnO2 or LiO2
C01G 51/50
Containing manganese: of the type n-, e.g. LiO2 or LiO2
C01G 53/502
Of the type n-, e.g. LiO2 or LiO2: containing lithium and cobalt