US 11,658,365 B2
Separator for electrochemical device and method for manufacturing the same
Seung-Hyun Lee, Daejeon (KR); Dong-Wook Sung, Daejeon (KR); and Hyun-Kyung Shin, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/628,499
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 30, 2019, PCT No. PCT/KR2019/001311
§ 371(c)(1), (2) Date Jan. 3, 2020,
PCT Pub. No. WO2019/151780, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 10-2018-0011649 (KR), filed on Jan. 30, 2018.
Prior Publication US 2020/0185676 A1, Jun. 11, 2020
Int. Cl. H01M 50/409 (2021.01); H01M 50/411 (2021.01); H01M 50/426 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/403 (2021.01); H01M 4/62 (2006.01); H01M 50/431 (2021.01); H01M 50/491 (2021.01); H01M 50/417 (2021.01); H01M 50/489 (2021.01)
CPC H01M 50/446 (2021.01) [H01M 4/623 (2013.01); H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/431 (2021.01); H01M 50/449 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A separator for an electrochemical device comprising:
a porous substrate;
a heat resistant layer formed on at least one surface of the porous substrate; and
an adhesive layer formed on a surface of the heat resistant layer opposite the porous substrate,
wherein the heat resistant layer comprises inorganic particles and a heat resistant binder resin,
the heat resistant binder resin has a melting point (Tm) of 150° C. or higher,
the adhesive layer consists of a fluorinated binder resin and a non-fluorinated binder resin as adhesive binder resins, and
the non-fluorinated binder resin comprises at least one cyano group-containing copolymer selected from the group consisting of cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyanoethyl cellulose, and cyanoethyl sucrose.