US 12,230,833 B2
Separator having silane-modified polyolefin and polyethylene, and method for producing the same
Xun Zhang, Tokyo (JP); Ryo Kuroki, Tokyo (JP); Yuki Fukunaga, Tokyo (JP); and Hiromi Kobayashi, Tokyo (JP)
Assigned to Asahi Kasei Battery Separator Corporation, Tokyo (JP)
Filed by Asahi Kasei Battery Separator Corporation, Tokyo (JP)
Filed on Jun. 24, 2022, as Appl. No. 17/849,149.
Application 17/849,149 is a division of application No. 16/957,908, granted, now 11,670,822, previously published as PCT/JP2019/040342, filed on Oct. 11, 2019.
Claims priority of application No. 2018-192964 (JP), filed on Oct. 11, 2018; application No. 2018-206944 (JP), filed on Nov. 1, 2018; application No. 2019-141639 (JP), filed on Jul. 31, 2019; and application No. 2019-141651 (JP), filed on Jul. 31, 2019.
Prior Publication US 2023/0006306 A1, Jan. 5, 2023
Int. Cl. H01M 50/411 (2021.01); H01M 10/0525 (2010.01); H01M 10/0587 (2010.01); H01M 50/403 (2021.01); H01M 50/443 (2021.01); H01M 50/46 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)
CPC H01M 50/411 (2021.01) [H01M 10/0525 (2013.01); H01M 10/0587 (2013.01); H01M 50/403 (2021.01); H01M 50/443 (2021.01); H01M 50/46 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A separator for an electricity storage device comprising a first porous layer (layer A) with a crosslinked structure that includes a silane-modified polyethylene, and a second porous layer (layer B) that includes inorganic particles,
wherein:
a ratio of a thickness (TA) of the first porous layer (layer A) with respect to a thickness (TB) of layer B the second porous layer (layer B) (TA/TB) is 0.22 to 14,
a shutdown temperature of the separator is 130° C. to 160° C., and
a meltdown temperature of the separator is 200° C. or higher, as measured based on electrical resistance under pressure of 10.0 MPa.