Binder composition for power storage devices, slurry for power storage device electrodes, power storage device electrode, and power storage device

Abstract

Provided is a binder composition for an electrical storage device, which enables the production of an electrical storage device electrode excellent in repeated charge-discharge characteristic through a reduction in internal resistance and also excellent in charge-discharge durability characteristic under high temperature through an improvement in adhesiveness. The binder composition for an electrical storage device according to the present disclosure includes: a polymer (A); and a liquid medium (B), wherein, with respect to 100 mass % in total of repeating units contained in the polymer (A), the polymer (A) contains: 15 mass % to 60 mass % of a repeating unit (a1) derived from a conjugated diene compound; and 1 mass % to 30 mass % of a repeating unit (a2) derived from an unsaturated carboxylic acid, and wherein tan δ (loss elastic modulus/storage elastic modulus) in dynamic viscoelasticity of the polymer (A) has one peak top in a range of from −50° C. or more to less than 15° C. (tan δ1), one peak top in a range of from 15° C. or more to less than 85° C. (tan δ2), and one peak top in a range of from 85° C. or more to 150° C. or less (tan δ3).

Dependencies are inferred from the claim text.