US 11,990,617 B2
Lithium metal composite oxide powder, positive electrode active substance for lithium secondary battery, positive electrode, and lithium secondary battery
Tomoya Kuroda, Fukui (JP); and Yuichiro Imanari, Niihama (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 16/979,415
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Mar. 13, 2019, PCT No. PCT/JP2019/010297
§ 371(c)(1), (2) Date Sep. 9, 2020,
PCT Pub. No. WO2019/177032, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 2018-045955 (JP), filed on Mar. 13, 2018.
Prior Publication US 2021/0083286 A1, Mar. 18, 2021
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2004/03 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A lithium metal composite oxide powder comprising:
secondary particles that are aggregates of primary particles; and
single particles that are different from the secondary particles and the primary particles,
wherein the lithium metal composite oxide is represented by composition formula (I), and the single particles have an average crushing strength exceeding 80 MPa:
Li[Lix(Ni(1-y-z-w)CoyMnzMw)1-x]O2  (I)
wherein M is one or more metal elements selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, B, Mo, Nb, Zn, Sn, Zr, Ga, La and V, −0.1≤x≤0.2, 0≤y≤0.4, 0≤z≤0.4, and 0≤w≤0.1.