US 12,454,465 B2
Nickel manganese cobalt composite hydroxide, method for producing nickel manganese cobalt composite hydroxide, lithium nickel manganese cobalt composite oxide, and lithium ion secondary battery
Hiroko Oshita, Ehime (JP); and Kazuomi Ryoshi, Ehime (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Appl. No. 17/425,152
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
PCT Filed Dec. 26, 2019, PCT No. PCT/JP2019/051178
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/153096, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. PCT/JP2019/001797 (WO), filed on Jan. 22, 2019; and application No. PCT/JP2019/016269 (WO), filed on Apr. 16, 2019.
Prior Publication US 2022/0119274 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C01G 53/04 (2025.01); H01M 10/0525 (2010.01)
CPC C01G 53/04 (2013.01) [H01M 10/0525 (2013.01); C01P 2004/51 (2013.01); C01P 2004/60 (2013.01); C01P 2006/12 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A lithium nickel manganese cobalt composite oxide composed of secondary particles to which primary particles containing a lithium, a nickel, a manganese, and a cobalt are aggregated, or composed of the primary particles and the secondary particles,
wherein a sodium content contained in the lithium nickel manganese cobalt composite oxide is less than 0.0005% by mass and a chloride radical content contained in the lithium nickel manganese cobalt composite oxide is 0.005% by mass or less, and
wherein when observing 100 or more particles of the lithium nickel manganese cobalt composite oxide selected randomly by a scanning electron microscope, a number that an aggregation of secondary particles is observed is 5% or less with respect to a total number of observed secondary particles.