US 11,718,723 B2
Crosslinked polyolefin separator and manufacturing method therefor
Joo-Sung Lee, Daejeon (KR); Bi-Oh Ryu, Daejeon (KR); Won-Sik Bae, Daejeon (KR); A-Young Lee, Daejeon (KR); and Heon-Sik Song, Daejeon (KR)
Assigned to LG Chem, Ltd.
Appl. No. 16/648,562
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 26, 2019, PCT No. PCT/KR2019/009361
§ 371(c)(1), (2) Date Mar. 18, 2020,
PCT Pub. No. WO2020/022848, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 10-2018-0087450 (KR), filed on Jul. 26, 2018; application No. 10-2018-0087451 (KR), filed on Jul. 26, 2018; and application No. 10-2018-0108560 (KR), filed on Sep. 11, 2018.
Prior Publication US 2020/0220139 A1, Jul. 9, 2020
Int. Cl. H01M 50/00 (2021.01); C08J 7/16 (2006.01); H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/489 (2021.01); H01M 50/406 (2021.01)
CPC C08J 7/16 (2013.01) [H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/417 (2021.01); H01M 50/489 (2021.01); C08J 2323/06 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A crosslinked polyolefin separator, comprising:
silane-crosslinked polyolefin, wherein the separator has gels with a longer side length of 50 μm or more in a number ranging from 0 to 3 per 1 m2 of the separator, and the separator shows a standard deviation of absorbance ratio between a center of the separator and a side thereof ranging from 0.01 to 0.5,
wherein the absorbance ratio is determined by I1090/I2920 (×1000), I1090 means an absorbance at 1090 cm−1 where a functional group of —Si—OCH3 derived from crosslinking is detected, and I2920 means an absorbance at 2920 cm−1 where a characteristic peak of polyolefin is expressed before crosslinking occurs.