US 12,347,851 B2
Method for manufacturing anode for lithium secondary battery
Suk Il Youn, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/612,030
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Aug. 25, 2020, PCT No. PCT/KR2020/011344
§ 371(c)(1), (2) Date Nov. 17, 2021,
PCT Pub. No. WO2021/045431, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10-2019-0110716 (KR), filed on Sep. 6, 2019.
Prior Publication US 2022/0223847 A1, Jul. 14, 2022
Int. Cl. H01M 4/38 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/382 (2013.01) [H01M 4/0423 (2013.01); H01M 4/0435 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of manufacturing a negative electrode for a lithium secondary battery, the method comprising:
preparing a lithium transfer film by forming a lithium layer on a protective layer of a transfer film, wherein the transfer film comprises a substrate and the protective layer;
preparing a negative electrode having a negative electrode active material layer formed on a current collector; and
transferring the lithium transfer film by contacting and rolling the lithium transfer film onto a surface of the negative electrode active material layer so that the lithium layer faces the negative electrode active material layer,
wherein the protective layer comprises an acrylic resin,
when transferring the lithium transfer film, the lithium layer and the protective layer are transferred onto the negative electrode active material layer,
wherein the substrate is one or more selected from the group consisting of polyethylene terephthalate (PET), polyimide (PI), polymethylmethacrylate (PMMA), polypropylene, polyethylene and polycarbonate,
wherein a thickness of the lithium layer is 0.01 to 20 μm,
wherein when preparing the lithium transfer film, the lithium layer is deposited and formed by one method selected from the group consisting of thermal evaporation deposition, evaporation deposition, chemical deposition, chemical vapor deposition (CVD), and physical vapor deposition, and
wherein the lithium layer has a pattern by depositing the lithium layer using a pattern mask.