US 12,456,724 B2
Irreversible additive, positive electrode material including irreversible additive, and lithium secondary battery including positive electrode material
Sung Chul Lim, Daejeon (KR); Min Chul Jang, Daejeon (KR); and In Sung Uhm, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/774,070
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 11, 2020, PCT No. PCT/KR2020/015729
§ 371(c)(1), (2) Date May 3, 2022,
PCT Pub. No. WO2021/096204, PCT Pub. Date May 20, 2021.
Claims priority of application No. 10-2019-0143768 (KR), filed on Nov. 11, 2019.
Prior Publication US 2022/0393156 A1, Dec. 8, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/134 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/582 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An additive comprising:
a lithium nickel oxide having a trigonal crystal structure and represented by Formula 1 below; and
a coating layer positioned on a surface of the lithium nickel oxide represented by Formula 1 and including a compound represented by Formula 2 below:
Li2+aNi1−bM1bO2+c,  [Formula 1]
wherein in Formula 1 above,
0≤a≤0.2, 0≤b≤0.5, and 0≤c≤0.2, and M1 is one or more selected from the group consisting of Cu, Mg, Pt, Al, Co, P, and B,
Li5+cFeO4−dAd,  [Formula 2]
wherein in Formula 2 above,
0≤c≤0.2 and 0≤d≤0.5, and A is one or more selected from the group consisting of F, Cl, Br, I, At, and S.