US 12,469,853 B2
Sacrificial positive electrode material with reduced gas generation and method of preparing thereof
Tae Gu Yoo, Daejeon (KR); Wang Mo Jung, Daejeon (KR); Chi Ho Jo, Daejeon (KR); Ji Hye Kim, Daejeon (KR); Hae Jung Jung, Daejeon (KR); and Jong Wook Heo, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/915,607
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Feb. 9, 2022, PCT No. PCT/KR2022/001998
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2022/182019, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 10-2021-0024248 (KR), filed on Feb. 23, 2021; and application No. 10-2022-0007852 (KR), filed on Jan. 19, 2022.
Prior Publication US 2023/0128140 A1, Apr. 27, 2023
Int. Cl. H01M 4/62 (2006.01); H01M 4/02 (2006.01)
CPC H01M 4/628 (2013.01) [H01M 2004/028 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of preparing a sacrificial positive electrode material, comprising:
calcining a raw material mixture of lithium oxide (Li2O) and cobalt oxide (CoO) under atmosphere containing an inert gas and oxygen gas, wherein the oxygen gas is at a partial pressure of 1% or less to prepare a lithium cobalt metal oxide represented by the following Chemical Formula (1),
wherein the atmosphere has a relative humidity (RH) of 0.1% to 15%:
LixCo(1−y)MyO4−zAz  [Chemical Formula 1]
wherein,
M is at least one selected from the group consisting of Ti, Al, Zn, Zr, Mn and Ni,
A is an oxygen-substituted halogen,
x, y and z are 5≤x≤7, 0≤y≤0.4, and 0≤z≤0.001.