US 12,155,087 B2
Separator for electrochemical device and electrochemical device comprising the same
Hyun-Woong Yun, Daejeon (KR); Jong-Keon Yoon, Daejeon (KR); and Hoe-Jin Hah, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/414,498
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed May 14, 2020, PCT No. PCT/KR2020/006359
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/235863, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10-2019-0057654 (KR), filed on May 17, 2019.
Prior Publication US 2022/0069416 A1, Mar. 3, 2022
Int. Cl. H01M 50/446 (2021.01); C08F 214/26 (2006.01); C08F 216/14 (2006.01); C08J 7/04 (2020.01); C08J 7/044 (2020.01); C08J 9/36 (2006.01); C08K 3/22 (2006.01); C09D 5/24 (2006.01); C09D 7/61 (2018.01); C09D 127/18 (2006.01); C09D 127/22 (2006.01); C09D 129/10 (2006.01); H01M 10/052 (2010.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/449 (2021.01); H01M 50/451 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/497 (2021.01)
CPC H01M 50/446 (2021.01) [C08J 9/365 (2013.01); C09D 5/24 (2013.01); C09D 7/61 (2018.01); C09D 127/22 (2013.01); H01M 10/052 (2013.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/449 (2021.01); H01M 50/491 (2021.01); C08J 2323/06 (2013.01); C08J 2327/22 (2013.01); H01M 50/489 (2021.01)] 13 Claims
 
1. A separator for an electrochemical device, comprising:
a porous polymer substrate; and
a porous coating layer on at least one surface of the porous polymer substrate,
wherein the porous coating layer comprises Inorganic particles and an ion conducting polymer, and
wherein the ion conducting polymer comprises a fluorine-based copolymer comprising fluoroolefin-based segments with anionic functional groups present in side chains or terminals of the copolymer,
wherein a volume ratio of the inorganic particles to the ion conducting polymer is 50:50 to 1:99,
wherein the separator has an ionic conductivity of 12×10−4 S/cm to 99×10−4 S/cm, and
the porous coating layer has a thickness of 1.5 to 6 μm, a porosity of 2 to 10%, and a pore size of 10 to 25 nm.