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 |
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.
|