US 12,308,417 B2
Electrode for secondary battery and lithium secondary battery comprising the same
In Young Song, Daejeon (KR); Joo Yul Baek, Daejeon (KR); Jeong Kyu Lee, Daejeon (KR); Sung Joon Oh, Daejeon (KR); and Jong Chan Lee, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Aug. 18, 2020, as Appl. No. 16/996,216.
Claims priority of application No. 10-2019-0101343 (KR), filed on Aug. 19, 2019; and application No. 10-2020-0098150 (KR), filed on Aug. 5, 2020.
Prior Publication US 2021/0057719 A1, Feb. 25, 2021
Int. Cl. H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/133 (2013.01) [H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrode for a secondary battery, comprising:
a current collector; and
at least one electrode material mixture layer present on a surface of the current collector, the at least one electrode material mixture layer comprising a negative electrode active material, a conductive agent, and a binder,
wherein, the electrode has a property such that in a regression curve obtained by regression analysis of shear strength data according to a cutting depth which are measured while obliquely cutting the electrode material mixture layer from a surface thereof until reaching the current collector using a surface and interfacial cutting analysis system (SAICAS), a ratio of a maximum value (σmax) to a minimum value (σmin) of shear strength is greater than 1 and equal to or less than 1.7.