US 12,119,490 B2
Positive electrode active material and secondary battery
Kosuke Kuroda, Kyoto (JP); Hiroshi Kawada, Hyogo (JP); and Atsushi Fukui, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/263,670
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 21, 2019, PCT No. PCT/JP2019/006652
§ 371(c)(1), (2) Date Jan. 27, 2021,
PCT Pub. No. WO2020/026487, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-144196 (JP), filed on Jul. 31, 2018.
Prior Publication US 2021/0296646 A1, Sep. 23, 2021
Int. Cl. H01M 4/505 (2010.01); C01G 53/00 (2006.01); H01M 4/36 (2006.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/42 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/582 (2013.01); H01M 10/0525 (2013.01); C01P 2002/54 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positive electrode active material for secondary batteries, the positive electrode active material comprising:
a first lithium oxide represented by a composition formula (1): Li2+xNi1−yA1yO2−zA2z, where −0.5≤x≤0.3, 0≤y≤0.1, and 0≤z≤0.3,
at least one of y and z being not 0,
A1 including at least one selected from the group consisting of Ba, Ca, W, and Ta,
A2 including at least one selected from the group consisting of halogen elements and S.