US 11,929,520 B2
Porous separator without polyolefin substrate including inorganic particles and polymer binder
Kyoung Ho Ahn, Daejeon (KR); Kwan Woo Nam, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); Young Duk Kim, Daejeon (KR); and Je An Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/976,859
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Apr. 17, 2019, PCT No. PCT/KR2019/004646
§ 371(c)(1), (2) Date Aug. 31, 2020,
PCT Pub. No. WO2019/221401, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 10-2018-0055138 (KR), filed on May 14, 2018.
Prior Publication US 2021/0005859 A1, Jan. 7, 2021
Int. Cl. H01M 50/446 (2021.01); C08K 3/22 (2006.01); H01M 10/0525 (2010.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01)
CPC H01M 50/446 (2021.01) [C08K 3/22 (2013.01); H01M 50/443 (2021.01); H01M 50/489 (2021.01); C08K 2003/2227 (2013.01); H01M 10/0525 (2013.01)] 14 Claims
 
1. A porous separator for electrochemical devices, which provides electrical insulation between a positive electrode and a negative electrode, wherein
the porous separator does not include a polyolefin substrate, and comprises a composition comprising inorganic particles, a polymer binder for coupling between the inorganic particles, and a crosslinking agent that has undergone a crosslinking reaction,
wherein the crosslinking agent is represented by Chemical Formula 4,

OG Complex Work Unit Chemistry
in Chemical Formula 4, m4 is an integer of 1 to 100, n4 is an integer of 0 to 30, o4 is an integer of 1 to 1,000, a weight average molecular weight of Chemical Formula 4 is 1,000 to 100,000, and p is a variable dependent thereon.