BINDER COMPOSITION FOR ELECTROCHEMICAL DEVICE, CONDUCTIVE MATERIAL DISPERSION LIQUID FOR ELECTROCHEMICAL DEVICE, SLURRY FOR ELECTROCHEMICAL DEVICE ELECTRODE, ELECTRODE FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE

Provided is a binder composition for an electrochemical device that has excellent viscosity stability and is capable of forming an electrode having excellent peel strength. The binder composition contains a polymer including a nitrile group-containing monomer unit, N-methyl-2-pyrrolidone, and a halogenated hydrocarbon. The content of the halogenated hydrocarbon is not less than 2 mass ppm and not more than 400 mass ppm relative to the content of the polymer.