US 12,431,585 B2
Separator with organic/inorganic porous coating layer for electrochemical device, and electrochemical device including same
Min Ji Kim, Daejeon (KR); Seung Hyun Lee, Daejeon (KR); Hye Won Kim, Daejeon (KR); and Kyung Ryun Ka, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Oct. 28, 2022, as Appl. No. 17/976,136.
Claims priority of application No. 10-2021-0147362 (KR), filed on Oct. 29, 2021; application No. 10-2022-0134358 (KR), filed on Oct. 18, 2022; and application No. PCT/KR2022/015890 (WO), filed on Oct. 18, 2022.
Prior Publication US 2023/0138132 A1, May 4, 2023
Int. Cl. H01M 50/414 (2021.01); H01M 50/431 (2021.01)
CPC H01M 50/414 (2021.01) [H01M 50/431 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A separator for an electrochemical device, comprising:
a separator substrate; and
an organic-inorganic composite porous coating layer on at least one surface of the separator substrate,
wherein the separator substrate is a porous film comprising a polyolefin-containing polymer,
wherein the organic-inorganic composite porous coating layer comprises a polymer resin particles and inorganic particles, and
wherein each particle of the polymer resin particles comprises a polyvinylidene fluoride (PVDF)-containing polymer and an acrylic polymer, and the PVDF-containing polymer has a Hansen solubility parameter (HSP) value of 13 or less and 1 or more.