US 12,237,512 B2
Binder composition for negative electrode, negative electrode, and secondary battery
Yo Han Kwon, Daejeon (KR); Joonwon Lim, Daejeon (KR); Min Chul Jang, Daejeon (KR); and Sun Kyu Kim, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/608,073
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Dec. 22, 2020, PCT No. PCT/KR2020/018877
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2021/133027, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 10-2019-0176460 (KR), filed on Dec. 27, 2019.
Prior Publication US 2022/0320517 A1, Oct. 6, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/1395 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01)
CPC H01M 4/622 (2013.01) [H01M 4/0404 (2013.01); H01M 4/48 (2013.01); H01M 2004/027 (2013.01); H01M 4/134 (2013.01); H01M 4/1395 (2013.01); H01M 4/386 (2013.01); H01M 4/621 (2013.01); H01M 4/623 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A binder composition for a negative electrode, the binder composition comprising:
a binder polymer comprising at least one first functional group selected from the group consisting of a hydroxy group and a carboxyl group; and
a crosslinked polymer comprising at least one second functional group,
wherein the crosslinked polymer is present in an amount of 2 parts by weight to 5 parts by weight based on 100 parts by weight of the binder polymer,
wherein the crosslinked polymer is poly(propylene glycol), tolylene 2,4-diisocyanate terminated, and
wherein the binder polymer is polyacrylic acid.