US 12,261,282 B2
Electrode for secondary battery and method of manufacturing electrode for secondary battery
Ki Hoon Paeng, Daejeon (KR); Hyungkyun Yu, Daejeon (KR); Sang Myeon Lee, Daejeon (KR); Hyung Seok Han, Daejeon (KR); and Jaewon Moon, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/609,642
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 5, 2020, PCT No. PCT/KR2020/015433
§ 371(c)(1), (2) Date Nov. 8, 2021,
PCT Pub. No. WO2021/112418, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. 10-2019-0160898 (KR), filed on Dec. 5, 2019; and application No. 10-2020-0143369 (KR), filed on Oct. 30, 2020.
Prior Publication US 2022/0216455 A1, Jul. 7, 2022
Int. Cl. H01M 4/04 (2006.01); C21D 7/06 (2006.01)
CPC H01M 4/0435 (2013.01) [C21D 7/06 (2013.01); H01M 4/0404 (2013.01); H01M 4/0471 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of manufacturing an electrode for a secondary battery, comprising the steps of:
coating an active material onto an electrode current collector to form a coated portion and an uncoated portion, and applying a compressive residual stress to a surface of the uncoated portion, wherein the step of applying the compressive residual stress to the surface of the uncoated portion comprises a step of performing a shot peening process on the surface of the uncoated portion; wherein the step of performing the shot peening process comprises a step of forming a dimple portion on the surface of the uncoated portion; wherein a plastic deformation layer is formed on a surface of the dimple portion, so that the plastic deformation layer has a residual compressive stress, and the inside of the uncoated portion located outside the plastic deformation layer has a tensile residual stress.