Pressure sensitive adhesive composition, pressure sensitive adhesive sheet for batteries, and lithium-ion battery

Patent metadata

Field	Value
Publication number	US-2018159166-A1
Application number	US-201715830382-A
Country	US
Kind code	A1
Filing date	Dec 4, 2017
Priority date	Dec 7, 2016
Publication date	Jun 7, 2018
Grant date	—

Abstract

[Problems] An object is to provide a pressure sensitive adhesive composition, a pressure sensitive adhesive sheet for batteries, and a lithium-ion battery in which the pressure sensitive adhesive is less likely to dissolve into an electrolyte solution even when the pressure sensitive adhesive sheet is in contact with the electrolyte solution.
[Solution] A battery ( 2 ) comprising a pressure sensitive adhesive sheet ( 1 ), wherein: the pressure sensitive adhesive sheet is used at a site in the battery at which there is a possibility of contact with an electrolyte solution; the pressure sensitive adhesive sheet comprises a base material ( 11 ) and a pressure sensitive adhesive layer ( 13 ) laminated at one side of the base material; and the pressure sensitive adhesive layer is formed of a pressure sensitive adhesive composition comprising: a (meth)acrylic ester polymer containing a monomer having a carboxy group in a molecule as a monomer unit that constitutes the polymer; and a metal chelate-based crosslinker.

First claim

1 . A battery comprising a pressure sensitive adhesive sheet, wherein:
the pressure sensitive adhesive sheet is used at a site in the battery at which there is a possibility of contact with an electrolyte solution; the pressure sensitive adhesive sheet comprises a base material and a pressure sensitive adhesive layer laminated at one side of the base material; and the pressure sensitive adhesive layer is formed of a pressure sensitive adhesive composition comprising: a (meth)acrylic ester polymer containing a monomer having a carboxy group in a molecule as a monomer unit that constitutes the polymer; and a metal chelate-based crosslinker.

2 . The battery as recited in claim 1 , wherein the pressure sensitive adhesive composition further comprises a silane coupling agent.

3 . The battery as recited in claim 1 , wherein, after a pressure sensitive adhesive that constitutes the pressure sensitive adhesive layer is immersed in a solvent of a nonaqueous electrolyte solution at 80° C. for 72 hours, the pressure sensitive adhesive has a gel fraction of 60% or more and 100% or less.

4 . The battery as recited in claim 1 , wherein the base material is a film of polymer having a nitrogen-containing ring structure at a main chain.

5 . The battery as recited in claim 1 , wherein a surface of the base material at the pressure sensitive adhesive layer side is formed with a hard coat layer.

6 . The battery as recited in claim 1 , wherein two or more conductors are fixed in a state in which the two or more conductors are in contact with each other in the battery using the pressure sensitive adhesive sheet.

7 . The battery as recited in claim 1 , wherein the battery is a lithium-ion battery.

8 . A method of manufacturing a battery, comprising:
preparing a pressure sensitive adhesive sheet comprising a base material and a pressure sensitive adhesive layer laminated at one side of the base material; and fixing two or more conductors in a state in which the two or more conductors are in contact with each other in the battery using the pressure sensitive adhesive sheet, wherein the pressure sensitive adhesive layer is formed of a pressure sensitive adhesive composition comprising: a (meth)acrylic ester polymer containing a monomer having a carboxy group in a molecule as a monomer unit that constitutes the polymer; and a metal chelate-based crosslinker.

Assignees

• Lintec Corp

Inventors

• Ansai Takeshi
• Kurata Yuichi
• Takada Kousuke
• Arazoe Tetsuya

Classifications

• C09J11/06

  organic · CPC title

• C09J2479/086

  in the substrate · CPC title

• H01M10/0525

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

• C08K3/36

  Silica · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title