US 12,218,319 B2
Method of preparing secondary battery
Dong Jun Lee, Daejeon (KR); Sa Rah Kim, Daejeon (KR); Dong Hui Kim, Daejeon (KR); and Kwang Ho Yoo, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/773,690
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 19, 2021, PCT No. PCT/KR2021/000728
§ 371(c)(1), (2) Date May 2, 2022,
PCT Pub. No. WO2021/149994, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 10-2020-0007192 (KR), filed on Jan. 20, 2020.
Prior Publication US 2022/0384775 A1, Dec. 1, 2022
Int. Cl. H01M 10/44 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/139 (2010.01); H01M 4/1395 (2010.01); H01M 4/38 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0585 (2010.01)
CPC H01M 10/446 (2013.01) [H01M 4/044 (2013.01); H01M 4/0447 (2013.01); H01M 4/0459 (2013.01); H01M 4/134 (2013.01); H01M 4/139 (2013.01); H01M 4/1395 (2013.01); H01M 4/386 (2013.01); H01M 4/661 (2013.01); H01M 4/667 (2013.01); H01M 10/0525 (2013.01); H01M 10/0585 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of preparing a secondary battery, the method comprising:
pre-lithiating an electrode assembly comprising an electrode structure comprising a plurality of electrodes and a plurality of separators; and a metal substrate,
wherein the plurality of electrodes and the plurality of separators are alternatingly stacked,
wherein the metal substrate is present on an outermost surface of the electrode structure in a direction in which the electrodes and the separators are stacked,
wherein the plurality of electrodes comprises negative electrodes, each comprising negative electrode active material layer, and positive electrodes, each comprising positive electrode active material layer, wherein each positive electrode and negative electrode are spaced apart from each other with one separator of the plurality of separators disposed therebetween,
wherein the pre-lithiating comprises:
applying a first current by electrically connecting one of the plurality of positive electrodes one of the plurality of negative electrodes; and
applying a second current by electrically connecting the metal substrate and one of the plurality of positive electrodes, after applying the first current.