Lithium ion battery exterior material

摘要

A lithium ion battery exterior material, includes: a base material layer, and a sequentially laminated adhesive layer, aluminum foil layer provided with a corrosion prevention treated layer, and an adhesive resin layer on one surface of the base material layer; wherein, the adhesive resin layer contains an acid-modified polyolefin resin and a miscible elastomer dispersed in the acid-modified polyolefin at a dispersed phase size of 1 nm to less than 1 μm.

主权项

1. A lithium ion battery exterior material, comprising:
a base material layer; and an adhesive layer, an aluminum foil layer provided with a corrosion prevention treated layer, an adhesive resin layer, and a sealant layer, which are sequentially laminated on one surface of the base material layer, the adhesive resin layer containing an acid-modified polyolefin resin and a miscible elastomer dispersed in the acid-modified polyolefin at a dispersed phase size of 1 nm to less than 1 μm, wherein the acid-modified polyolefin resin is a resin that has been graft-modified with one or more compounds of unsaturated carboxylic acid derivative components selected from the group consisting of unsaturated carboxylic acids, acid anhydrides of unsaturated carboxylic acids and esters of unsaturated carboxylic acids, and an absolute value of birefringence following a heat treatment of a thermoplastic resin layer is 0.002 or less and a degree of crystallization is 60% or less, the thermoplastic resin layer being composed of the adhesive resin layer and the sealant layer.