Binder for secondary battery electrodes, use of same, and method for producing binder for secondary battery electrodes

Abstract

The present invention provides a binder for secondary battery electrodes capable of exhibiting excellent binding property with an active material even in an electrolytic solution and exhibiting a high capacity retention rate by having good electrolytic solution swelling resistance while maintaining flexibility as compared with a conventional case. In addition, provided are a composition for a secondary battery electrode mixture layer containing the binder, and a secondary battery electrode and a secondary battery obtained using the composition. A binder for secondary battery electrodes containing an emulsion containing a block polymer having a polymer block (A) and a polymer block (B), in which the polymer block (A) contains a structural unit derived from an ethylenically unsaturated carboxylic acid monomer, and the polymer block (B) contains a structural unit derived from a (meth)acrylic acid ester monomer having a solubility of less than 1 g in 100 g of water at 20° C.

Dependencies are inferred from the claim text.