| abstract |
An object of the present invention is to provide an exterior material for a lithium ion battery, which has high adhesion to a base material layer and an aluminum foil layer without undergoing a conversion treatment such as chromate treatment, and has excellent deep drawability.nThe solution of the present invention is that the exterior material 1 for a lithium ion battery is sequentially laminated with an adhesive layer 12, an underlayer treatment layer 13, an aluminum foil layer 14, an anti-corrosion treatment layer 15, and an adhesive layer on one surface of the base material layer 11. The resin layer 16 and the sealant layer 17 are laminated, and the undercoat layer 13 contains the following component (A) and the following component (B) and the following component (C), and the mass of the component (A) is 100. The total amount of the component (B) and the component (C) is 200 to 12,000 parts by mass. (A) A crosslinked resin composed of a resin (A1) having two or more nitrogen-containing functional groups and a resin (A2) having a reactive functional group reactive with the nitrogen-containing functional group. (B) Rare earth element oxide. (C) Phosphoric acid or phosphate. |