Electrode and battery, and methods of producing the same

A method of producing an electrode including:

• an electrode sheet having a collector, an active material layer formed on the collector, and a lead connecting portion which is configured as an exposed extension of the collector, on both surfaces of which the active material layer is not formed;
• and a lead, said method comprising:
• a metal piece joining step of overlapping and joining the lead connecting portion, the lead, and a metal piece to each other.

A method of producing an electrode including:

• an electrode sheet set including a plurality of electrode sheets, each of said electrode sheets having a collector, an active material layer formed on said collector, and a lead connecting portion which is configured as an exposed extension of said collector, on both surfaces of which said active material layer is not formed;
• and a lead, said method comprising:
• a metal piece joining step of overlapping and joining the lead connecting portion, the lead, and a metal piece to each other.

A method of producing a battery including a negative electrode, a positive electrode, and an electrolyte, at least one of the negative electrode and the positive electrode including:

• an electrode sheet having a collector, an active material layer formed on the collector, and a lead connecting portion which is configured as an exposed extension of the collector, on both surfaces of which the active material layer is not formed;
• and a lead, said method comprising:
• a metal piece joining step of overlapping and joining the lead connecting portion, the lead, and a metal piece to each other.

A method of producing a battery including a negative electrode, a positive electrode, and an electrolyte, at least one of the negative electrode and the positive electrode including:

• an electrode sheet set including a plurality of electrode sheets, each of the electrode sheets having a collector, an active material layer formed on the collector, and a lead connecting portion which is configured as an exposed extension of the collector, on both surfaces of which the active material layer is not formed;
• and a lead, said method comprising:
• a metal piece joining step of overlapping and joining the lead connecting portion, the lead, and a metal piece to each other.