Electric storage device, method for manufacturing the same, exterior material for electric storage device, and method for manufacturing the same

Abstract

A storage device, an electrode body, and an exterior body that seals the electrode body, wherein the exterior body has an exterior film that wraps the electrode body, and a lid body that seals the electrode body together with the exterior film, the exterior film is composed of a laminate including at least a barrier layer and a heat-sealable resin layer, the barrier layer is in a direction perpendicular to the rolling direction of the barrier layer at a position where the heat-sealable resin layer of the exterior film is heat-sealed to the lid body, and for a cross-section obtained by cutting the barrier layer perpendicularly from the surface of the barrier layer, when the grain boundary is defined as 5°, the area average angular difference of GOS (grain orientation spread) obtained by performing crystal analysis by the EBSD method is 2.50° or less, a storage device.

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