CPC H01M 4/622 (2013.01) [C08G 73/1067 (2013.01); C08K 3/04 (2013.01); C08K 3/11 (2018.01); C08K 3/22 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C08K 2003/2203 (2013.01); C08K 2003/2262 (2013.01); C08K 2003/2289 (2013.01); C08K 2003/2293 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01); H01M 2004/028 (2013.01)] | 11 Claims |
1. A binder for a lithium secondary battery, the binder containing a polyimide copolymer containing a repeating unit represented by a following Chemical Formula 1 and a repeating unit represented by a following Chemical Formula 2:
wherein in the Chemical Formula 1 and the Chemical Formula 2, each of R1 to R6 independently represents one functional group selected from a group consisting of H, —CH3-xFx and —F, R7 represents at least one functional group selected from a group consisting of a carboxyl group, a hydroxy group, a sulfonic acid group, a phosphoric acid group, and an acid anhydride group, x denotes an integer from 1 to 3, and each of a and b independently denotes an integer of 2 to 200.
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