ELECTRODE SHEET, METHOD OF MANUFACTURING THE SAME AND POWER STORAGE DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an electrode sheet capable of realizing both productivity and development of an excellent property without using a special collector and to provide a power storage device using the electrode sheet.

SOLUTION: A plurality of cuts 8 penetrating through both a collector and an active material layer are provided in a positive electrode sheet 9 and a negative electrode sheet 10. A length of a diameter of a circle surrounding the cuts 8 is set to be half of a longitudinal dimension or less of a rectangle which is the smallest area accommodating the widest face of the active material layer and the largest diameter of a circle inscribed with an opening of the cuts 8 is set to 1 mm or less resulting in improving electric property without reducing a mechanical strength of the electrode sheet.

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