	US 12,155,072 B2
	Precursor particle for preparation of cathode active material for secondary battery and novel precursor powder containing same
Sung Kyun Chang, Daegu (KR); Sang Hoon Jeon, Daegu (KR); Sunhong Park, Daejeon (KR); and Doe Hyoung Kim, Daegu (KR)
Assigned to L&F CO., LTD., Daegu (KR)
Filed by L&F CO., LTD., Daegu (KR)
Filed on Oct. 27, 2023, as Appl. No. 18/384,434.
Application 18/384,434 is a continuation of application No. 17/606,819, granted, now 12,002,956, previously published as PCT/KR2019/012434, filed on Sep. 25, 2019.
Claims priority of application No. 10-2019-0050190 (KR), filed on Apr. 30, 2019.
Prior Publication US 2024/0063386 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/50 (2013.01); C01P 2002/85 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/84 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)]

15 Claims

1. A novel precursor particle for preparing a cathode active material comprising:

a transition metal precursor particle containing one or more transition metals; and

one or more of an alkali metal and an alkaline earth metal,

wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particle,

wherein the novel precursor particle has a composition represented by the following Formula 1:

[(1-x-Y)A₂CO₃*xAOH*yA₂O]/[(1-a-b)M(OH)₂*aMOOH*bM(OH_1-c)₂] (1)

wherein

0≤x≤1, 0≤y≤1, 0≤a≤1, 0≤b≤1, 0≤c≤1;

A is at least one alkali metal and/or alkaline earth metal; and

M comprises one or more transition metals stable in a tetracoordinate or hexacoordinate structure, and

wherein the molar ratio (A/M) of total alkali metal and/or alkaline earth metal (A) to total transition metal (M) is more than 0 and is not more than 1.5.