US 12,322,798 B2
Positive electrode active material for secondary battery, and secondary battery
Ryuichi Natsui, Osaka (JP); and Mitsuhiro Hibino, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/773,435
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Oct. 13, 2020, PCT No. PCT/JP2020/038575
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/085113, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-197818 (JP), filed on Oct. 30, 2019.
Prior Publication US 2022/0407061 A1, Dec. 22, 2022
Int. Cl. H01M 4/505 (2010.01); C01G 53/50 (2025.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/505 (2013.01) [C01G 53/50 (2013.01); H01M 4/525 (2013.01); C01P 2002/52 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01); H01M 10/0525 (2013.01)] 2 Claims
 
1. A positive electrode active material for a secondary battery, the positive electrode active material comprising a lithium-transition metal composite oxide,
the lithium-transition metal composite oxide represented by the general formula LixMnyNizSbaObFc wherein x+y+z+a≤b+c=2, 1≤≤1.2, 0.4≤y≤0.8, 0≤z≤0.4, 0<a<0.01, and 1.8<b<2 are satisfied, the lithium-transition metal composite oxide including no Co,
wherein the general formula satisfies 0.002≤a≤0.005.