US 11,811,052 B2
Positive electrode active material for non-aqueous electrolyte secondary battery
Jiro Okada, Chiba (JP); Tetsufumi Komukai, Ehime (JP); Jun Yokoyama, Ehime (JP); Takahiro Ogawa, Ehime (JP); and Tomoko Nakayama, Ehime (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Appl. No. 17/042,431
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
PCT Filed Mar. 28, 2019, PCT No. PCT/JP2019/013843
§ 371(c)(1), (2) Date Sep. 28, 2020,
PCT Pub. No. WO2019/189679, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 2018-065969 (JP), filed on Mar. 29, 2018.
Prior Publication US 2021/0119201 A1, Apr. 22, 2021
Int. Cl. H01M 4/134 (2010.01); C01G 53/00 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/134 (2013.01) [C01G 53/50 (2013.01); H01M 4/131 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2002/74 (2013.01); H01M 2004/028 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A positive electrode active material for a non-aqueous electrolyte secondary battery comprising:
a lithium metal composite oxide powder represented by a general formula:
LizNi1−x−yCoxMyO2−α,
wherein 0<x≤0.35, 0≤y≤0.35, 0.95≤z≤1.30, −0.15≤α≤0.15, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti and Al; and
a coating layer placed on particle surfaces of the lithium metal composite oxide powder;
wherein the coating layer is a mixed-phase of a crystalline phase and an amorphous phase.