| 摘要 |
A composition containing an electrode active material, a water-insoluble polymer (A), and a water-soluble polymer (B), wherein: the water-insoluble polymer (A) contains 20 wt% to 60 wt% of an aliphatic conjugated diene monomer unit (a1), 0.5 wt% to 10 wt% of an ethylenically unsaturated carboxylic acid monomer unit (a2), and 30 wt% to 79.5 wt% of a unit (a3) of a monomer that is copolymerizable therewith; the water-soluble polymer (B) contains 20 wt% to 60 wt% of an ethylenically unsaturated carboxylic acid monomer unit (b1), 25 wt% to 78 wt% of a (meth)acrylic acid ester monomer unit (b2), and 2 wt% to 15 wt% of a unit (b3) of a sulfonic acid group-containing monomer that is copolymerizable therewith; and a ratio (A)/(B) of the water-insoluble polymer (A) relative to the water-soluble polymer (B) is 80/20 to 95/5. |
