Power storage device exterior material, method for manufacturing power storage device exterior material, and power storage device

摘要

PROBLEM TO BE SOLVED: To provide a packaging material for an electricity storage device in which high adhesion of a barrier layer provided with a corrosion resistant film is maintained even when an electrolytic solution is attached. At least a base layer, a barrier layer, and a heat-fusible resin layer are formed in this order from a laminate, and the base layer is formed of a single-layer polyester film. The surface of at least one side of the barrier layer is provided with a corrosion-resistant coating, and when the corrosion-resistant coating is analyzed using time-of-flight secondary ion mass spectrometry, it is derived from CePO4-. The ratio PPO3/PCePO4 of the peak intensity PPO3 derived from PO3 to the peak intensity PCePO4 is within the range of 80 or more and 120 or less. [Selection diagram] None