	US 12,315,906 B2
	Method of preparing negative electrode
Oh Byong Chae, Daejeon (KR); Ye Ri Kim, Daejeon (KR); Su Yeon Lee, Daejeon (KR); and Seung Hae Hwang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/770,239
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 30, 2020, PCT No. PCT/KR2020/015078 § 371(c)(1), (2) Date Apr. 19, 2022, PCT Pub. No. WO2021/086132, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10-2019-0138873 (KR), filed on Nov. 1, 2019.
Prior Publication US 2022/0359855 A1, Nov. 10, 2022
Int. Cl. H01M 8/04 (2016.01); H01M 4/04 (2006.01); H01M 4/66 (2006.01); H01M 8/04007 (2016.01); H01M 8/04014 (2016.01); H01M 8/04089 (2016.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/0416 (2013.01) [H01M 4/0404 (2013.01); H01M 4/667 (2013.01); H01M 8/04014 (2013.01); H01M 8/04074 (2013.01); H01M 8/04089 (2013.01); H01M 10/0569 (2013.01); H01M 2004/027 (2013.01)]

15 Claims

1. A method of preparing a negative electrode, the method comprising steps of:

forming a cell by sequentially stacking a preliminary negative electrode, a separator, and a lithium metal;

immersing the cell in an electrolyte solution comprising a lithium salt and a solvent;

applying a current after the cell is immersed in the electrolyte solution comprising the lithium salt and the solvent;

separating the preliminary negative electrode from the cell after removing the cell immersed in the electrolyte solution from the electrolyte solution;

washing the separated preliminary negative electrode;

performing a first drying on the washed preliminary negative electrode at room temperature; and

performing a second drying on the first dried preliminary negative electrode at a temperature ranging from 30° C. to 70° C. in a vacuum state.