An adhesive film for a metal terminal being interposed between a metal terminal electrically connected to an electrode of a power storage device element, and a power storage device external member that seals the power storage device element. The adhesive film is configured from a laminate provided with: a first polyolefin layer disposed on the metal terminal side; a base material; and a second polyolefin layer disposed on the power storage device external member side. Under the following measurement conditions, the restoration rate measured when an indenter is pressed in a vertical direction with respect to a cross section in a thickness direction of the first polyolefin layer is 46.0% or greater. Restoration rate measurement conditions are a load of 10 mN, a load application speed of 1 mN/10 seconds, retention time of 10 seconds, a load releasing speed of 1 mN/10 seconds, and measurement temperature of 25° C.

Provided herein are energy storage devices. In some cases, the energy storage devices are capable of being transported on a vehicle and storing a large amount of energy. An energy storage device is provided comprising at least one liquid metal electrode, an energy storage capacity of at least about 1 MWh and a response time less than or equal to about 100 milliseconds (ms).

A flexible printed circuit board with a multi-layer all solid-state lithium ion battery printed thereon is described. A flexible printed circuit board comprises at least one electrically insulating liquid crystal polymer or polyimide layer and at least one electrically conductive metal layer. The multi-layer all solid-state lithium ion battery comprises at least one anode, at least one cathode, and at least one UV curable solid electrolyte therebetween. The battery is encapsulated between the flexible printed circuit board and a layer of laminated aluminum foil on top of the multi-layer all solid-state lithium ion battery and adhered directly to the flexible printed circuit board.

A flexible printed circuit board with a multi-layer all solid-state lithium ion battery printed thereon is described. A flexible printed circuit board comprises at least one electrically insulating liquid crystal polymer or polyimide layer and at least one electrically conductive metal layer. The multi-layer all solid-state lithium ion battery comprises at least one anode, at least one cathode, and at least one UV curable solid electrolyte therebetween. The battery is encapsulated between the flexible printed circuit board and a layer of laminated aluminum foil on top of the multi-layer all solid-state lithium ion battery and adhered directly to the flexible printed circuit board.

A terminal-coating resin film according to one aspect of the present disclosure is so disposed in a power storage device including a power storage device body and a terminal electrically connected to the power storage device body as to cover an outer peripheral surface of part of the terminal. The terminal-coating resin film has a single-layer structure or a multilayer structure and includes a resin layer having at least one secondary dispersion peak γ within a range of −130° C. to −50° C. in a profile of a loss tangent tan δ obtained by dynamic viscoelastic measurement under a condition of 1.0 Hz. The terminal-coating film is comprised of a resin composition including a first resin including polyolefin and a second resin including at least one resin selected from polyester, polyamide, polycarbonate, and polyphenylene ether.

A terminal-coating resin film according to one aspect of the present disclosure is so disposed in a power storage device including a power storage device body and a terminal electrically connected to the power storage device body as to cover an outer peripheral surface of part of the terminal. The terminal-coating resin film has a single-layer structure or a multilayer structure and includes a resin layer having at least one secondary dispersion peak γ within a range of −130° C. to −50° C. in a profile of a loss tangent tan δ obtained by dynamic viscoelastic measurement under a condition of 1.0 Hz. The terminal-coating film is comprised of a resin composition including a first resin including polyolefin and a second resin including at least one resin selected from polyester, polyamide, polycarbonate, and polyphenylene ether.

A terminal-equipped case member having an external terminal for electrically connecting an external device, which is fixed to a case body for housing an electronic component or a case member constituting a case lid attached to the case body, includes a base material made of metal that forms the case member; the external terminal inserted into a through hole formed through the base material; a sealing material formed of a first resin material that seals a gap between the external terminal and the base material; and a terminal adhesion layer. The external terminal and the sealing member are bonded to each other through the terminal adhesion layer formed of a second resin material with a higher adhesion to the external terminal than that of the first resin material.

A terminal-equipped case member having an external terminal for electrically connecting an external device, which is fixed to a case body for housing an electronic component or a case member constituting a case lid attached to the case body, includes a base material made of metal that forms the case member; the external terminal inserted into a through hole formed through the base material; a sealing material formed of a first resin material that seals a gap between the external terminal and the base material; and a terminal adhesion layer. The external terminal and the sealing member are bonded to each other through the terminal adhesion layer formed of a second resin material with a higher adhesion to the external terminal than that of the first resin material.

An adhesive film for a metal terminal, interposed between a metal terminal electrically connected to an electrode of a power storage device element and a power storage device packaging material for sealing the power storage device element, wherein the adhesive film for a metal terminal includes a laminate sequentially including a first polyolefin layer on the metal terminal side, a base material, and a second polyolefin layer on the power storage device packaging material side, the laminate has a first adhesive layer between the first polyolefin layer and the base material, a second adhesive layer between the second polyolefin layer and the base material, or both the first adhesive layer and the second adhesive layer, the base material has a melting peak temperature of 135° C. or more, and at least one of the first adhesive layer and the second adhesive layer has a melting peak temperature of 100° C. or less.

An adhesive film for a metal terminal, interposed between a metal terminal electrically connected to an electrode of a power storage device element and a power storage device packaging material for sealing the power storage device element, wherein the adhesive film for a metal terminal includes a laminate sequentially including a first polyolefin layer on the metal terminal side, a base material, and a second polyolefin layer on the power storage device packaging material side, the laminate has a first adhesive layer between the first polyolefin layer and the base material, a second adhesive layer between the second polyolefin layer and the base material, or both the first adhesive layer and the second adhesive layer, the base material has a melting peak temperature of 135° C. or more, and at least one of the first adhesive layer and the second adhesive layer has a melting peak temperature of 100° C. or less.