Lithium battery packaging material

Patent metadata

Field	Value
Publication number	US-10468639-B2
Application number	US-201615277585-A
Country	US
Kind code	B2
Filing date	Sep 27, 2016
Priority date	Apr 3, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A lithium battery packaging material is provided with a laminate formed by sequentially laminating an adhesive layer, an aluminum foil layer provided with a corrosion prevention treatment layer on at least one surface thereof, an adhesive resin layer and a sealant layer on one surface of a substrate layer. The adhesive resin layer contains an adhesive resin composition, and a polypropylene or propylene-α-olefin copolymer having an atactic structure.

First claim

What is claimed is:

1. A lithium battery packaging material comprising:
a laminate configured by laminating an adhesive layer,
an aluminum foil layer provided with a corrosion prevention treatment layer on at least one surface thereof, an adhesive resin layer,
and a sealant layer in this order on one surface of a substrate layer,
wherein the adhesive resin layer contains an adhesive resin composition; (A) a polypropylene having an atactic structure or a propylene-α-olefin copolymer having an atactic structure and (B) a propylene-α-olefin copolymer having an isotactic structure,
a weight content of the adhesive resin composition in the adhesive resin layer is 40 to 95 wt %,
a weight content of a total (A)+(B) of (A) the polypropylene having the atactic structure or propylene-α-olefin copolymer having the atactic structure and (B) the propylene-α-olefin copolymer having the isotactic structure in the adhesive resin layer is 5 to 60 wt %,
a weight content of (A) the polypropylene having the atactic structure or propylene-α-olefin copolymer having the atactic structure in the adhesive resin layer is from 5 to 60 wt %, and,
a weight content of (B) the propylene-α-olefin copolymer having the isotactic structure in the adhesive resin layer is 5 to 60 wt %.

2. The lithium battery packaging material of claim 1 , wherein
the corrosion prevention treatment layer is provided on a surface of the aluminum foil layer, the surface of the aluminum foil layer being in contact with the adhesive resin layer; and
the corrosion prevention treatment layer contains a cationic polymer and a cross-linking agent for cross-linking the cationic polymer.

3. The lithium battery packaging material of claim 2 , wherein the cationic polymer is at least one member selected from the group consisting of a polyethyleneimine, an ionic polymer complex made of a polyethyleneimine and a polymer having carboxylic acid, a primary amine-grafted acrylic resin obtained by grafting a primary amine onto a main acrylic backbone, a polyallylamine and a derivative thereof, and an aminophenol.

4. The lithium battery packaging material of claim 1 , wherein the corrosion prevention treatment layer is a layer containing a rare earth element oxide.

5. The lithium battery packaging material of claim 1 , wherein the corrosion prevention treatment layer includes a layer formed by subjecting the aluminum foil layer to one or more of a degreasing treatment, a hydrothermal modification treatment, an anodic oxidation treatment, and a chemical conversion treatment.

6. The lithium battery packaging material of claim 1 , wherein the weight content of (A) the polypropylene having the atactic structure or propylene-α-olefin copolymer having the atactic structure in the adhesive resin layer is from 5 to 30 wt % and wherein the weight content of (B) the propylene-α-olefin copolymer having the isotactic structure in the adhesive resin layer is 5 to 30 wt %.

7. The lithium battery packaging material of claim 1 , wherein the weight content of (A) the polypropylene having the atactic structure or propylene-α-olefin copolymer having the atactic structure in the adhesive resin layer is from 20 to 30 wt % and wherein the weight content of (B) the propylene-α-olefin copolymer having the isotactic structure in the adhesive resin layer is 20 to 30 wt %.

Assignees

• Toppan Printing Co Ltd

Inventors

• OGIHARA Yu
• Suzuta Masayoshi

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• B32B2457/00

  Electrical equipment · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2220/10

  Batteries in stationary systems, e.g. emergency power source in plant · CPC title