Electrochemical device and method for producing same

A method for producing an electrochemical device, the electrochemical device comprising:

• a first electrode, a second electrode, a separator interposed between the first electrode and the second electrode, and an electrolyte, the method including:
• preparing an electrode including a current collecting foil and a mixture layer provided on the current collecting foil, as at least one electrode of the first electrode and the second electrode, wherein the current collecting foil of the at least one electrode has a first region covered with the mixture layer and a second region not covered with the mixture layer and exposing a surface of the current collecting foil,
• electrically connecting a lead terminal to the second region of the current collecting foil,
• disposing a protection tape so as to cover at least a portion of the lead terminal, and allowing the protection tape to adhere to the one electrode at at least a portion of a surface of the lead terminal, and at at least a portion of a third region, third region being a part of the second region not covered with the lead terminal, and
• pressing the third region of the one electrode through the protection tape at the time of or after the adhesion of the protection tape.