| abstract |
Provided is an exterior material for a power storage device that maintains high adhesion between a barrier layer having a corrosion-resistant film and an adhesive layer even when moisture invades the inside of the power storage device. It is composed of a laminate having at least a base material layer, a barrier layer, an adhesive layer, and a heat-sealing resin layer in this order. The adhesive layer is a cured product of a resin composition containing a compound having an isocyanate group. A corrosion-resistant film is provided on at least the surface of the barrier layer on the adhesive layer side. For the corrosion resistant coating, flight when analyzed with time-of secondary ion mass spectrometry, CrPO 4 - PO 3 to the peak intensity P CrPO4 derived from - the ratio of the peak intensity P PO3 derived from P PO3 / CrPO4 is in the range of 6-120, Analysis by X-ray photoelectron spectroscopy of the corrosion resistant coating, a peak derived from the peak P OCO derived from the C1s of O-C = O bond in the range of 290eV from 287 eV, the C1s of C-C bond to 285 eV P CC is detected, The peak P OCO height the peak P peak obtained by dividing the height of the CC height ratio values P OCO / CC is in the range of 0.10 to 0.50, exterior storage device Material. |