US 12,255,351 B2
Separator for electrochemical device and method for manufacturing the same
Dae-Sung Jang, Daejeon (KR); Dong-Wook Sung, Daejeon (KR); and So-Mi Jeong, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/251,413
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 29, 2019, PCT No. PCT/KR2019/014401
§ 371(c)(1), (2) Date Dec. 11, 2020,
PCT Pub. No. WO2020/091396, PCT Pub. Date May 7, 2020.
Claims priority of application No. 10-2018-0130072 (KR), filed on Oct. 29, 2018.
Prior Publication US 2021/0280944 A1, Sep. 9, 2021
Int. Cl. H01M 50/46 (2021.01); C08F 214/22 (2006.01); H01M 10/0525 (2010.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01)
CPC H01M 50/449 (2021.01) [C08F 214/22 (2013.01); H01M 10/0525 (2013.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/461 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A separator for an electrochemical device, comprising:
a porous polymer substrate; and
an inorganic coating layer formed on at least one surface of the porous polymer substrate,
wherein the inorganic coating layer comprises inorganic particles and a binder resin,
wherein the binder resin comprises a polyvinylidene fluoride (PVdF)-based polymer having a main chain,
wherein at least one hydrogen atom in the main chain of the PVdF-based polymer is substituted with an acrylic compound-derived functional group, and
wherein the polyvinylidene fluoride (PVdF)-based polymer comprises a polymer represented by the following Chemical Formula 1, wherein each of R1 and R2 independently represents a group represented by the following Chemical Formula 2, and each of R3, R4 and R5 is independently substituted with a functional group having at least one hydrogen bound to each carbon atom, and the functional group is at least one selected from the group consisting of ester, ketone, hydroxyl, ether, carboxyl and carbonyl groups,

OG Complex Work Unit Chemistry