| abstract |
Provided is a packaging material for a battery, said packaging material having superior formability. A packaging material for a battery, said packaging material being composed from a layered body that comprises at least a substrate layer, a barrier layer, and a thermally fusible resin layer, in this order, wherein the substrate layer has at least a polyester film layer and a polyamide film layer, and when the fusion peak temperature of the polyester film layer is measured twice using differential scanning calorimetry, the difference between the fusion peak temperature P (°C) measured during a first temperature increase and the fusion peak temperature Q (°C) measured during a second temperature increase is within 5°C. |