| 摘要 |
A binder composition comprising a polymer dispersed in a liquid dispersion medium, wherein the polymer comprises structural units represented by the following formula: <CHEM> wherein R<1> is hydrogen, C1-4 alkyl group, or halogen, R<2> is C1-20 alkyl group or C6-30 aryl group, R<3> and R<4> are hydrogen or methyl group, provided that R<3> and R<4> are not simultaneously methyl group, and n is an integer of 1 - 50. A lithium ion secondary battery having an electrode made by using this binder composition exhibits excellent characteristics at repetition of a charge-discharge cycle. |
