	US 12,381,205 B2
	Positive electrode active material for lithium secondary battery
Joo Hyeong Woo, Busan (KR); Sung Kyun Chang, Daegu (KR); Sang Hoon Jeon, Daegu (KR); Chang Min Choi, Daegu (KR); Sung Woo Cho, Daegu (KR); and Ji Sun An, Daegu (KR)
Assigned to L&F CO., LTD., Daegu (KR)
Appl. No. 17/620,205
Filed by L&F CO., LTD., Daegu (KR)
PCT Filed Jun. 15, 2020, PCT No. PCT/KR2020/007682 § 371(c)(1), (2) Date Apr. 29, 2022, PCT Pub. No. WO2020/256359, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 10-2019-0071246 (KR), filed on Jun. 17, 2019.
Prior Publication US 2022/0263074 A1, Aug. 18, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 4/52 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/05 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/366 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

10 Claims

1. A cathode active material for a lithium secondary battery comprising:

a core containing lithium composite metal oxide; and

a coating layer disposed on the core and having an amorphous phase,

wherein the amorphous phase comprises lithium oxide, tungsten oxide, and boron oxide in a form of mixture, and

wherein the coating layer comprises a substance having the composition represented by the following Formula 2:

αW_xO_y-βB_mO_n-γLi₂O (2)

wherein the conditions α+β+γ=1, 0.25≤x/y≤0.5, and 0.5≤m/n≤0.75 are satisfied.