Lithium battery packaging material

Patent metadata

Field	Value
Publication number	US-2016372720-A1
Application number	US-201615254558-A
Country	US
Kind code	A1
Filing date	Sep 1, 2016
Priority date	Mar 6, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

A lithium battery packaging material of the present invention includes a laminate in which a substrate layer, a first adhesive layer, a metal foil layer, a corrosion prevention treatment layer, a second adhesive layer, and a sealant layer are laminated in this order. In the packaging material, the corrosion prevention treatment layer contains an rare-earth oxide, and 1 to 100 parts by mass of phosphoric acid or phosphate relative to 100 parts by mass of the rare-earth oxide, the second adhesive layer includes an adhesive composition containing an acid modified polyolefin resin and a polyfunctional isocyanate compound, and, in an infrared absorption spectrum of the second adhesive layer, a ratio (Y/X) between absorption (X) derived from C—H bending vibration of CH 3 and absorption (Y) derived from N—H bending vibration of a biuret bond is 0.3 or less.

First claim

What is claimed is:

1 . A lithium battery packaging material, comprising a laminate in which a substrate layer, a first adhesive layer, a metal foil layer, a corrosion prevention treatment layer, a second adhesive layer, and a sealant layer are laminated in this order, wherein:
the corrosion prevention treatment layer contains a rare-earth oxide and 1 to 100 parts by mass of phosphoric acid or phosphate, relative to 100 parts by mass of the rare-earth oxide; the second adhesive layer is made of an adhesive composition containing an acid-modified polyolefin resin and a polyfunctional isocyanate compound; and in an infrared absorption spectrum of the second adhesive layer, a ratio (Y/X) between absorption (X) derived from C—H bending vibration of CH 3 and absorption (Y) derived from N—H bending vibration of a biuret bond is 0.3 or less.

2 . A lithium battery packaging material comprising a laminate in which a substrate layer, a first adhesive layer, a metal foil layer, a corrosion prevention treatment layer, a second adhesive layer, and a sealant layer are laminated in this order, wherein:
the corrosion prevention treatment layer is formed by applying at least one treatment selected from the group consisting of degreasing treatment, hydrothermal synthesis treatment, anodic oxidation treatment, and chemical conversion treatment, to the metal foil layer; the second adhesive layer is made of an adhesive composition containing an acid-modified polyolefin resin and a polyfunctional isocyanate compound; and in an infrared absorption spectrum of the second adhesive layer, a ratio (Y/X) between absorption (X) derived from C—H bending vibration of CH 3 and absorption (Y) derived from N—H bending vibration of a biuret bond is 0.3 or less.

3 . The lithium battery packaging material of claim 1 , wherein the polyfunctional isocyanate compound has an isocyanurate structure.

4 . The lithium battery packaging material of claim 1 , wherein the acid-modified polyolefin resin is made of an acid-modified polyolefin resin obtained by graft-polymerizing at least one member selected from the group consisting of an unsaturated carboxylic acid, an unsaturated carboxylic acid anhydride, an unsaturated carboxylic acid ester, and an unsaturated carboxylic acid anhydride ester, onto a homopolymer of propylene or a copolymer of propylene and ethylene.

5 . The lithium battery packaging material of claim 1 , wherein the rare-earth oxide is cerium oxide.

6 . The lithium battery packaging material of claim 1 , wherein the corrosion prevention treatment layer further contains a cationic polymer.

7 . The lithium battery packaging material of claim 6 , wherein the cationic polymer is at least one member selected from the group consisting of polyethyleneimine, an ion polymer complex composed of polyethyleneimine and a polymer having carboxylic acid, a primary amine-grafted acrylic resin obtained by graft-polymerizing a primary amine onto a main acrylic skeleton, polyallylamine or a derivative thereof, and aminophenol.

8 . The lithium battery packaging material of claim 1 , wherein the adhesive composition further contains an organic metal catalyst containing at least one metal selected from the group consisting of tin, titanium, and zirconium.

Assignees

• Toppan Printing Co Ltd

Inventors

• Muraki Takuya
• Yamazaki Tomohiko
• Suzuta Masayoshi

Classifications

• H01M10/052

  Li-accumulators · CPC title

• B32B15/08

  of synthetic resin · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• B32B2307/714

  Inert, i.e. inert to chemical degradation, corrosion · CPC title

• B32B27/34

  comprising polyamides · CPC title