Power storage device

A power storage device, comprising:

• a first electrode including a first collector having a first surface with a central portion on which a first active material layer is arranged;
• a second electrode including a second collector having a first surface with a central portion on which a second active material layer is arranged, with the second active material layer facing the first active material layer on the first electrode;
• a separator located between the first active material layer and the second active material layer;
• a seal arranged between the first electrode and the second electrode so as to surround the first active material layer and the second active material layer, the seal being adhered to the first surface of each of the first collector and the second collector so to form a sealed space between the first electrode and the second electrode for accommodating liquid electrolyte, wherein
• the seal is composed of an acid-modified polyolefin resin,
• the first electrode includes a carbon coating layer applied to a part adhered to the seal in the first surface of the first collector,
• the carbon coating layer contains carbon particles and a coating layer binder, and
• the coating layer binder has, in an IR absorption spectrum measured by an infrared spectrophotometer, a strength ratio (PCOO/PCH) from 0.5 to 3.3, inclusive, with respect to a peak (PCOO) in a range from 1680 cm−1 to 1720 cm−1, inclusive, to a peak (PCH) in a range from 1400 cm−1 to 1600 cm−1, inclusive.