Electrode for electrochemical device, electrochemical device, and method of producing electrode for electrochemical device

A positive electrode for an electrochemical device comprising a current collector and a positive electrode mixed material layer on the current collector, wherein

• the positive electrode mixed material layer contains a positive electrode active material, a binder, and a foaming agent,
• the binder is a polymer including a nitrile group-containing monomer unit, and in which a proportion constituted by a diene monomer unit and a proportion constituted by the nitrile group-containing monomer unit are, in total, not less than 55 mass % and not more than 80 mass %, and in which a proportion constituted by the nitrile group-containing monomer unit is 55 mass % or more, when the amount of all repeating units included in the polymer is taken to be 100 mass %, and
• volume resistivity RA of a laminate of the positive electrode mixed material layer and the current collector at 25° C. is not less than 0.1 Ω·cm and not more than 200 Ω·cm, and a ratio of volume resistivity RB of the laminate at 350° C. relative to the volume resistivity RA of the laminate at 25° C. is 10 or more.