Adhesive Film, Electricity Storage Device, And Method For Producing Electricity Storage Device

Abstract: An adhesive film used for an electricity storage device, wherein the electricity storage device has a structure in which an electricity storage device element is accommodated in a package formed by an electricity storage device exterior material, the electricity storage device exterior material is constituted by at least a laminate including a base material layer, a barrier layer, and a heat-fusible resin layer in this order from the outside, the electrical storage device element is accommodated in the package by heat fusing the heat-fusible resin layers of the electricity storage device exterior material to each other, the adhesive film is used by being interposed between the heat-fusible resin layers at a position where the heat-fusible resin layers are heat-fused to each other, and the adhesive film has a multilayer structure and includes at least one resin layer L having a melting peak temperature lower by 5°C or more than that of the heat-fusible resin layers of the electricity storage device exterior material.

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