US 12,230,842 B2
Electrode for lithium secondary battery and method of manufacturing the same
Yong Hee Kang, Daejeon (KR); Byung Chan Kang, Daejeon (KR); Sung Jun Park, Daejeon (KR); and Byung Wook Jo, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR)
Filed on Oct. 25, 2021, as Appl. No. 17/509,793.
Claims priority of application No. 10-2020-0147990 (KR), filed on Nov. 6, 2020; and application No. 10-2021-0134755 (KR), filed on Oct. 12, 2021.
Prior Publication US 2022/0149491 A1, May 12, 2022
Int. Cl. H01M 50/534 (2021.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 50/534 (2021.01) [H01M 4/0402 (2013.01); H01M 4/0435 (2013.01); H01M 4/0471 (2013.01); H01M 10/0525 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An electrode for lithium secondary battery comprised of an electric collector formed of a metal and a slurry coated on a portion of the electric collector, the electrode for lithium secondary battery comprising:
a coated part including the portion of the electric collector, on which the slurry is coated, and the slurry; and
an uncoated part including a remaining portion of the electric collector on which the slurry is not coated, the uncoated part extending from the coated part,
wherein the uncoated part includes:
a first uncoated part extended from the coated part; and
a second uncoated part extended from the first uncoated part, the second uncoated part including a tab connection portion coupled to an electrode tab,
wherein a tensile strength of the first uncoated part is greater than a tensile strength of the tab connection portion, and
wherein a ratio of the tensile strength of the first uncoated part to a tensile strength of the portion of the electric collector on which the slurry is coated is 0.65 to 0.85,
wherein a length of the first uncoated part in a direction in which the first uncoated part extends is less than a length of the tab connection portion in a direction in which the second uncoated part extends,
wherein the first uncoated part and the second uncoated part form an integrated body with the coated part.