Adhesive Film, Method For Manufacturing Adhesive Film, Power Storage Device, And Method For Manufacturing Power Storage Device

Abstract: Provided is an adhesive film that is used in a power storage device. The power storage device comprises a structure in which a power storage device element is accommodated in a package formed by a power storage device exterior material. The power storage device exterior material is constituted of a laminate including at least a base material layer, a barrier layer, and thermally-fusible resin layers in this order from the outside. The thermally-fusible resin layers of the power storage device exterior material are thermally fused together so as to accommodate the power storage device element in the package. The adhesive film is used so as to be interposed between the thermally-fusible resin layers at a position where the thermally-fusible resin layers are thermally fused together. The adhesive film has a multilayer structure, and the adhesive film includes at least one layer having a cross-sectional hardness, as measured in an environment at a temperature of 110°C, of 15 N/mm2 or greater. In addition, the adhesive film includes at least one resin layer L having a melting peak temperature of 100-135°C.

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