abstract |
The object of the present invention is to provide a binder composition for a secondary battery porous membrane comprising polycarboxylic acid and water, wherein the polycarboxylic acid contains 20% by mass or more and 50% by mass or less of a carboxylic acid group-containing monomer unit, The polycarboxylic acid is water-insoluble below pH 6.5 and water-soluble above pH 8, and the pH of the binder composition for the porous membrane of the secondary battery is below 6.5; and using the binder composition A slurry for a porous membrane of a secondary battery, a porous membrane for a secondary battery, and a secondary battery. |