Binder for non-aqueous electrolyte secondary battery electrodes

Abstract

A binder for non-aqueous electrolyte secondary battery electrodes which minimizes the degree of electrode expansion of the non-aqueous electrolyte secondary battery includes; the binder for non-aqueous electrolyte secondary battery electrode, a crosslinked polymer that contains a carboxyl group or a salt of this crosslinked polymer. The crosslinked polymer or a salt thereof has a volume-based median diameter of 0.60 μm or more and 1.0 μm or less as measured in an acetonitrile medium, while having a degree of swelling water of 25 or more to 40 or less in a pH of 8.

Dependencies are inferred from the claim text.