Power storage device and manufacturing method thereof

A power storage device comprising a power storage element and an electrolytic solution, the power storage element being impregnated with the electrolytic solution,

• the power storage element includes:
• an anode body;
• a cathode body opposed to the anode body;
• and
• a separator having a separator base material and a conductive polymer deposited on the separator base material, the separator being interposed between the anode body and the cathode body,
• wherein the separator has a first surface layer including a first surface opposed to the anode body and a second surface layer including a second surface opposed to the cathode body,
• the separator base material includes paper or an unwoven fabric each containing a non-conductive fiber,
• the conductive polymer is deposited on the non-conductive fiber, and
• a density of the non-conductive fiber in the first surface layer is different from a density of the non-conductive fiber in the second surface layer.

A power storage device comprising a power storage element and an electrolytic solution, the power storage element being impregnated with the electrolytic solution,

• the power storage element includes:
• an anode body;
• a cathode body opposed to the anode body;
• and
• a separator having a separator base material and a conductive polymer deposited on the separator base material, the separator being interposed between the anode body and the cathode body,
• wherein the separator has a first surface layer including a first surface opposed to the anode body and a second surface layer including a second surface opposed to the cathode body, and
• a deposition amount of the conductive polymer, which is deposited on the separator base material on the first surface, per unit area of the separator base material is greater than a deposition amount of the conductive polymer, which is deposited on the separator base material on the second surface, per unit area of the separator base material.