	US 12,002,990 B2
	Porous separator and lithium secondary battery comprising same
Woongchul Choi, Daejeon (KR); Junghun Choi, Daejeon (KR); Yonghee Kang, Daejeon (KR); Minchul Jang, Daejeon (KR); Suk Il Youn, Daejeon (KR); and Byoungkuk Son, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/279,070
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 11, 2019, PCT No. PCT/KR2019/013361 § 371(c)(1), (2) Date Mar. 23, 2021, PCT Pub. No. WO2020/076121, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 10-2018-0122101 (KR), filed on Oct. 12, 2018.
Prior Publication US 2022/0052421 A1, Feb. 17, 2022
Int. Cl. H01M 50/457 (2021.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 4/40 (2006.01); H01M 10/052 (2010.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)

CPC H01M 50/457 (2021.01) [H01M 4/382 (2013.01); H01M 4/405 (2013.01); H01M 10/052 (2013.01); H01M 50/434 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 2004/027 (2013.01)]

15 Claims

1. A porous separator comprising:

a porous layer containing a plurality of plate-shaped inorganic particles and a first binder polymer positioned on a part or all of a surface of the plate-shaped inorganic particles to connect and fix between the plate-shaped inorganic particles;

a metal layer disposed on a surface of the porous layer; and

a ceramic coating layer disposed on another surface of the porous layer which is opposite to the surface on which the metal layer is disposed,

wherein the porous separator does not include a polymer other than the first binder polymer, and

the ceramic coating layer includes BaSrTiO₃or PbLaZrTiO₃.