Binder composition for electrochemical device, conductive material dispersion liquid for electrochemical device, slurry for electrochemical device electrode, electrode for electrochemical device, and electrochemical device

A binder composition for an electrochemical device comprising a first polymer, a second polymer, an organic solvent, and a non-ionic surfactant wherein

• the first polymer includes a nitrile group-containing monomer unit and includes either or both of an aliphatic conjugated diene monomer unit and an alkylene structural unit,
• the second polymer includes, in a proportion of not less than 70 mass % and not more than 95 mass % when all structural units in the second polymer are taken to be 100 mass %, a structural unit indicated by formula (I), shown below,
• where, in formula (I), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom, a phenyl group, an alkyl group having a carbon number of not less than 1 and not more than 6, or a phenyl group including not fewer than one and not more than three alkyl groups having a carbon number of not less than 1 and not more than 6, and n represents an integer of 3 or more, and
• the non-ionic surfactant is at least one selected from the group consisting of polyoxyethylene monolaurate, polyoxyethylene monostearate and polyoxyethylene monooleate.