Method of manufacturing electrode including folding portion and electrode sheet including folding portion

An electrode manufacturing method comprising:

• coating an electrode mixture coated portion on an electrode sheet, leaving an uncoated portion of the electrode sheet having no electrode mixture formed thereon;
• slitting the electrode sheet into a plurality of unit electrode sheets along a slitting line;
• and
• then notching the electrode sheet along a notching line,
• wherein the uncoated portion comprises:
• first and second electrode tab formation portions;
• and
• first and second folding portions each extending parallel to a direction in which the slitting line extends,
• wherein the slitting line is formed on the electrode mixture coated portion and is located between the first and second folding portions at a location that divides the electrode mixture coated portion into two equal parts,
• wherein the notching line is a straight line passing through the electrode mixture coated portion and one of the first folding portion or the second folding portion, the notching line extending perpendicular to the slitting line.