| 摘要 |
PROBLEM TO BE SOLVED: To provide a binder composition for a negative electrode, capable of providing a power storage device high in charge/discharge capacity and less in the degree of capacity deterioration due to the repetition of charge/discharge cycles.SOLUTION: The binder composition for a negative electrode is a binder composition for a negative electrode of a power storage device, containing at least a polymer (A), water (B) and a liquid medium (C). The polymer (A) is at least one selected from the group consisting of a polyamic acid and an imidized polymer thereof, the polyamic acid being obtained by the reaction between (a) mol of tetracarboxylic dianhydride and b mol of diamine while a ratio a/b is more than 0.95 and 0.99 or less. |
