US 11,876,222 B2
Nickel composite hydroxide and manufacturing method thereof, cathode active material for nonaqueos-electrolyte secondary battery and manufacturing method thereof, and nonaqueous-electrolyte secondary battery
Atsushi Fukui, Ehime (JP); Katsuya Inoue, Ehime (JP); Shuhei Oda, Ehime (JP); and Hiroyuki Toya, Ehime (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Filed on Aug. 29, 2022, as Appl. No. 17/898,027.
Application 17/898,027 is a division of application No. 17/318,692, filed on May 12, 2021, granted, now 11,545,663.
Application 17/318,692 is a division of application No. 15/892,681, filed on Feb. 9, 2018, granted, now 11,038,168, issued on Jun. 15, 2021.
Application 15/892,681 is a division of application No. 14/124,418, granted, now 10,128,501, issued on Nov. 13, 2018, previously published as PCT/JP2012/059101, filed on Apr. 3, 2012.
Claims priority of application No. 2011-127343 (JP), filed on Jun. 7, 2011.
Prior Publication US 2022/0407065 A1, Dec. 22, 2022
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/006 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/34 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A cathode active material for a nonaqueous-electrolyte secondary battery that is essentially composed of a lithium nickel composite oxide that is expressed by the general expression:
Li1+uNixMnyCozMtO2 (x+y+z+t=1, 0.3≤x, 0≤y≤0.55, 0≤z≤0.4, 0≤t≤0.1, wherein 0.7≤x, −0.05≤u≤0.50, or 0.3≤x≤0.7, 0.10≤u≤0.50, and M as an additive element is selected from one or more of among Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W, and has a hexagonal crystal structure with a layered structure;
the lithium nickel composite oxide composed of substantially spherical secondary particles that are formed of sintered primary particles that clump together, wherein Li, Ni, Mn, and Co are uniformly dispersed throughout the primary particles,
wherein
an average particle size thereof is greater than 8 μm and less than or equal to 16 μm, and a value [(d90−d10)/average particle size], which is an index that indicates the extent of the particle size distribution, being 0.60 or less,
the tap density is 2.0 g/cm3 or more, and
wherein the secondary particles respectively have a solid structure that is dense from the outside to the inside by the sintered primary particles that clump together, and the specific surface area is preferably 0.2 m2/g or greater and 1.5 m2/g or less.