Exterior material for power storage device, method for manufacturing same, and power storage device

Patent metadata

Field	Value
Publication number	US-12548826-B2
Application number	US-202118026931-A
Country	US
Kind code	B2
Filing date	Sep 8, 2021
Priority date	Sep 25, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

This exterior material for a power storage device is constituted of at least an outside layer, a barrier layer, and an inside layer, in that order from the outer side. The inside layer includes a compound represented by general formula (A). (In general formula (A), R11 and R12 each independently represent an alkyl group having 1 to 18 carbons, or a phenyl group that optionally has a substituent).

First claim

The invention claimed is:

1 . An exterior material for electrical storage devices comprising a laminate including at least a base material layer, a barrier layer and an inner layer in this order from the outside, the inner layer containing a compound represented by the following general formula (A):

wherein R 11 and R 12 each independently represent an alkyl group having 1 to 18 carbon atoms, or a phenyl group optionally having a substituent.

2 . The exterior material for electrical storage devices according to claim 1 , wherein in general formula (A), the phenyl group has, as a substituent, at least one group selected from the group consisting of an alkyl group having 1 to 9 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, and an aralkyl group having 7 to 12 carbon atoms.

3 . The exterior material for electrical storage devices according to claim 1 , wherein the compound represented by general formula (A) is at least one of a compound represented by the following formula (A′) and a compound represented by the following formula (A″):

wherein in general formula (A′), R n1 and R n2 each independently represent a substituent other than a hydrogen atom, each p independently represents an integer of 0 to 3, and each q independently represents an integer of 0 to 5; and in general formula (A″), each R n3 independently represents an alkyl group having 1 to 9 carbon atoms, and each s independently represents an integer of 0 to 3.

4 . The exterior material for electrical storage devices according to claim 1 , wherein the compound represented by general formula (A) is at least one of a compound represented by the following formula (A1) and a compound represented by the following formula (A2):

5 . The exterior material for electrical storage devices according to claim 1 , wherein the inner layer includes an adhesive layer and a heat-sealable resin layer in this order from the barrier layer side, and at least one of the adhesive layer and the heat-sealable resin layer contains a compound represented by general formula (A).

6 . The exterior material for electrical storage devices according to claim 1 , wherein the inner layer further contains at least one selected from the group consisting of the phosphorus-based antioxidant different from a compound represented by general formula (A), a phenol-based antioxidant, and a bifunctional processing stabilizer.

7 . The exterior material for electrical storage devices according to claim 1 , wherein the bifunctional processing stabilizer contains a compound having an acrylate group and a phenolic hydroxyl group in one molecule.

8 . The exterior material for electrical storage devices according to claim 1 , wherein the bifunctional processing stabilizer contains a compound represented by the following general formula (B):

wherein R 13 and R 14 each independently represent an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; R 15 represents a hydrogen atom, or an alkyl group having 1 to 3 carbon atoms;
and R 16 represents a hydrogen atom or a methyl group.

9 . A method for manufacturing an exterior material for electrical storage devices, the method comprising the step of laminating a base material layer, a barrier layer and an inner layer in this order from the outside to the inner side to obtain a laminate, the inner layer containing a compound represented by the following general formula (A):

wherein R 11 and R 12 each independently represent an alkyl group having 1 to 18 carbon atoms, or a phenyl group optionally having a substituent.

10 . An electrical storage device in which an electrical storage device element comprising at least a positive electrode, a negative electrode and an electrolyte is stored in a packaging formed of the exterior material for electrical storage devices according to claim 1 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Kiyohara Yoshiko
• Takahagi Atsuko
• Kodani Kazufumi
• Yasuda Daisuke

Classifications

• H01M50/129

  with two or more layers of only organic material · CPC title

• H01M50/1243

  characterised by the internal coating on the casing · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01G11/78 Primary

  Cases; Housings; Encapsulations; Mountings · CPC title

• H01M50/10

  Primary casings; Jackets or wrappings · CPC title