POWER STORAGE DEVICE

摘要

An objective of the present invention is to provide a power storage device such that a layering shift of an electrode in the layered electrode body can be prevented, and concentration of stresses caused by the variation in the electrode volume accompanying charging and discharging does not occur readily. This battery serving as the power storage device comprises: a layered electrode body wherein a plurality of electrode pairs have been layered; and a fixing tape provided to extend over both end portions of the layered electrode body in the electrode layering direction, and having a pair of adhesive portions where each is adhered to each of the two end portions and a middle portion connecting each of the adhesive portions to one another. The middle portion of the fixing tape comprises a base portion along the side surface of the layered electrode body and an extra portion overhanging in a direction separating from the side portion. The tape surfaces facing each other in the extra portion are adhered in a peelable manner.