US 11,916,238 B2
Electrode and method for manufacturing the same
Il-Hong Kim, Daejeon (KR); O-Jong Kwon, Daejeon (KR); Hee-Chang Youn, Daejeon (KR); Yo-Han Kwon, Daejeon (KR); and Min-Chul Jang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 18/033,555
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Mar. 10, 2022, PCT No. PCT/KR2022/003385
§ 371(c)(1), (2) Date Apr. 25, 2023,
PCT Pub. No. WO2022/191645, PCT Pub. Date Sep. 15, 2022.
Claims priority of application No. 10-2021-0032998 (KR), filed on Mar. 12, 2021.
Prior Publication US 2024/0021830 A1, Jan. 18, 2024
Int. Cl. H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/58 (2010.01); H01M 10/052 (2010.01)
CPC H01M 4/623 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/5825 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01)] 13 Claims
 
1. An electrode comprising:
a current collector; and
an electrode active material layer disposed on at least one surface of the current collector,
wherein the electrode active material layer comprises:
a lower layer region facing the current collector, and
an upper layer region facing the lower layer region and extended to a surface of the electrode active material layer,
the lower layer region comprises a first active material and a first non-rubbery binder, and is free from a rubbery binder,
the upper layer region comprises a second active material, a second non-rubbery binder, and the rubbery binder,
the rubbery binder is a hydrogenated nitrile butadiene rubber (H-NBR),
each of the first non-rubbery binder and the second non-rubbery binder comprises a polyvinylidene fluoride (PVDF)-based polymer, and
a weight ratio of the second non-rubbery binder to the rubbery binder in the upper layer region is 1:0.03 to 1:0.07.