US 12,009,519 B2
Cathode active material, preparation method thereof, cathode including the same, and secondary battery
Joonhee Kim, Seoul (KR); Sangbok Ma, Suwon-si (KR); and Jonghoon Ka, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 23, 2021, as Appl. No. 17/482,684.
Claims priority of application No. 10-2021-0051350 (KR), filed on Apr. 20, 2021.
Prior Publication US 2022/0336803 A1, Oct. 20, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 10/0562 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/0471 (2013.01); H01M 4/366 (2013.01); H01M 10/0562 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A cathode active material comprising a compound
represented by Formulas 2a to 2r:
Lix(Co1−yNby)z(P2O7)4  Formula 2a
wherein in Formula 2a, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yMoy)z(P2O7)4  Formula 2b
wherein in Formula 2b, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yTay)z(P2O7)4  Formula 2c
wherein in Formula 2c, 5.5≤x≤6.5, 0.01≤00.05, and 4.8≤z≤5.2,
Lix(Co1−yWy)z(P2O7)4  Formula 2d
wherein in Formula 2d, 5.5≤x≤6.5, 0.01≤00.05, and 4.8≤z≤5.2,
Lix(Co1−yYy)z(P2O7)4  Formula 2e
wherein in Formula 2e, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yLay)z(P2O7)4  Formula 2f
wherein in Formula 2f, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yZry)z(P2O7)4  Formula 2g
wherein in Formula 2g, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yHfy)z(P2O7)4  Formula 2h
wherein in Formula 2h, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yTCy)z(P2O7)4  Formula 2i
wherein in Formula 2i, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yRey)z(P2O7)4  Formula 2j
wherein in Formula 2j, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yRuy)z(P2O7)4  Formula 2k
wherein in Formula 2k, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yOs)z(P2O7)4  Formula 2l
wherein in Formula 2l, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yRhy)z(P2O7)4  Formula 2m
wherein in Formula 2m, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yIry)z(P2O7)4  Formula 2n
wherein in Formula 2n, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yPdy)z(P2O7)4  Formula 2o
wherein in Formula 2o, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yPty)z(P2O7)4  Formula 2p
wherein in Formula 2p, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2,
Lix(Co1−yAgy)z(P2O7)4  Formula 2q
wherein in Formula 2q, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2, or
Lix(Co1−yAuy)z(P2O7)4  Formula 2r
wherein in Formula 2r, 5.5≤x≤6.5, 0.01≤y≤0.05, and 4.8≤z≤5.2.