Packaging material for power storage device and power storage device including packaging material

Abstract

A packing material for a power storage device includes a laminated structure including a substrate layer, a first adhesive layer, a metal foil layer, a second adhesive layer, and a sealant layer in this order, the second adhesive layer including a reaction product of at least acid-modified polyolefin and a multifunctional isocyanate compound, and the second adhesive layer satisfies a condition expressed by an inequality of the following Formula (1): 0.01≤{(C+D)−B}/A≤0.60 . . . (1) [where A to D represent intensities in infrared absorption spectra of the second adhesive layer measured by infrared spectroscopy, A represents a maximum intensity between wavenumbers 3040 and 2760 cm-1, B represents a maximum intensity between wavenumbers 1850 and 1780 cm-1, C represents a maximum intensity between wavenumbers 1760 and 1600 cm-1, and D represents a maximum intensity between wavenumbers 2150 and 2090 cm-1.]

Dependencies are inferred from the claim text.