CPC C08G 73/1042 (2013.01) [C08G 73/105 (2013.01); C08G 73/1039 (2013.01); C08G 73/1064 (2013.01); C08G 73/1067 (2013.01); C08G 73/1071 (2013.01); C08G 73/1078 (2013.01); C08G 73/1082 (2013.01); C09D 179/08 (2013.01); H01M 50/414 (2021.01); H01M 50/443 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/489 (2021.01); H01M 10/052 (2013.01); H01M 2220/30 (2013.01)] | 18 Claims |
1. A separator, comprising:
a polyolefin-based substrate film, and
a coating layer positioned on at least one of surface of the polyolefin-based substrate film,
wherein the coating layer is formed from a composition comprising an organic binder including a polyamic acid represented by any one of the following Chemical Formulae 5 to 9, a low boiling point solvent having a boiling point less than 150° C., and a high boiling point solvent having a boiling point of 150° C. or more:
wherein, in Chemical Formula 5, x is an integer of 15 to 5000,
wherein, in Chemical Formula 6, x is an integer of 15 to 5000,
wherein, in Chemical Formula 7, x is an integer of 15 to 5000,
wherein, in Chemical Formula 8, x is an integer of 15 to 5000, y is an integer of 15 to 5000, and a ratio x:y is 5:5 to 1:9, and
wherein, in Chemical Formula 9:
x is an integer of 15 to 5000, and y is an integer of 15 to 5000, and
a ratio of repeating units x to y is 9:1 to 7:3.
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