Electric storage device and method for producing the same

A method for producing an electrode composite sheet, the method comprising:

• forming a plurality of electric storage units, each unit including:
• a positive electrode including a positive-electrode collector electrode and a positive-electrode active-material layer disposed on the positive-electrode collector electrode,
• a negative electrode including a negative-electrode collector electrode and a negative-electrode active-material layer disposed on the negative-electrode collector electrode, such that the negative-electrode active-material layer faces the positive-electrode active-material layer,
• a first insulating layer bonded to both the positive-electrode active-material layer of the positive electrode and to the negative-electrode active-material layer of the negative electrode to insulate the positive electrode from the negative electrode, the first insulating layer formed from a resin permeable to an electrolyte such that an air permeability P satisfies:
• 1250 s/100 cc<P<95000 s/100 cc,
• wherein s=seconds and cc=cubic centimeters, and
• at least one closed region defined by the first insulating layer and disposed between the positive-electrode active-material layer of the positive electrode and the negative-electrode active-material layer of the negative electrode, the at least one closed region being surrounded by the first insulating layer in a plan view of the electric storage device,
• wherein the at least one closed region holds the electrolyte between the positive electrode and the negative electrode;
• and
• producing the electrode composite sheet by integrating a plurality of the positive-electrode collector electrodes or a plurality of the negative-electrode collector electrodes using the first insulating layer.

A method for producing an electric storage device, the method comprising:

• forming a positive electrode including a positive-electrode collector electrode and a positive-electrode active-material layer disposed on the positive-electrode collector electrode;
• forming a negative electrode including a negative-electrode collector electrode and a negative-electrode active-material layer disposed on the negative-electrode collector electrode, such that the negative-electrode active-material layer faces the positive-electrode active-material layer;
• and
• forming a first insulating layer bonded to both the positive-electrode active-material layer of the positive electrode and to the negative-electrode active-material layer of the negative electrode to insulate the positive electrode from the negative electrode, the first insulating layer formed from a resin permeable to an electrolyte such that an air permeability P satisfies:
• 1250 s/100 cc<P<95000 s/100 cc,
• wherein s=seconds and cc=cubic centimeters,
• wherein the first insulating layer defines at least one closed region between the positive-electrode active-material layer of the positive electrode and the negative-electrode active-material layer of the negative electrode, the at least one closed region being surrounded by the first insulating layer in a plan view of the electric storage device and holding the electrolyte between the positive electrode and the negative electrode.