Separator-integrated electrode plate and capacitor element

Patent metadata

Field	Value
Publication number	US-2018097218-A1
Application number	US-201715675886-A
Country	US
Kind code	A1
Filing date	Aug 14, 2017
Priority date	Oct 3, 2016
Publication date	Apr 5, 2018
Grant date	—

Abstract

A separator-integrated electrode plate includes a current collecting sheet; an active material layer provided on the current collecting sheet, and a separator layer provided on the active material layer and configured to allow ions in electrolyte to pass through. The separator layer includes a polyimide layer provided on the active material layer and made of polyimide that has been melted in a solvent and then deposited as a film, and a polyolefin particle layer provided on the polyimide layer and made of polyolefin resin particles accumulated on the polyimide layer, the polyolefin resin particles having a melting point of 140° C. or less.

First claim

What is claimed is:

1 . A separator-integrated electrode plate comprising:
a current collecting sheet; an active material layer provided on the current collecting sheet; and a separator layer provided on the active material layer and configured to allow ions contained in electrolyte to permeate through the separator layer, wherein the separator layer is formed of:
a polyimide layer provided made of a film of polyimide deposited on the active material layer after the polyimide is melted in a solvent; and
a polyolefin particle layer made of polyolefin resin particles accumulated on the polyimide layer, the polyolefin resin particles having a melting point of 140° C. or less.

2 . The separator-integrated electrode plate according to claim 1 , wherein the polyimide layer has a thickness of 10.0 μm or less.

3 . The separator-integrated electrode plate according to claim 2 , wherein the polyimide layer has a thickness of 6.0 μm or less.

4 . The separator-integrated electrode plate according to claim 1 , wherein the polyimide layer has a thickness of 0.5 μm or more.

5 . The separator-integrated electrode plate according to claim 1 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

6 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 1 ; and an electrolyte impregnated in the electrode body.

7 . The separator-integrated electrode plate according to claim 2 , wherein the polyimide layer has a thickness of 0.5 μm or more.

8 . The separator-integrated electrode plate according to claim 3 , wherein the polyimide layer has a thickness of 0.5 μm or more.

9 . The separator-integrated electrode plate according to claim 2 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

10 . The separator-integrated electrode plate according to claim 3 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

11 . The separator-integrated electrode plate according to claim 4 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

12 . The separator-integrated electrode plate according to claim 7 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

13 . The separator-integrated electrode plate according to claim 8 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.

14 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 2 ; and an electrolyte impregnated in the electrode body.

15 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 3 ; and an electrolyte impregnated in the electrode body.

16 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 4 ; and an electrolyte impregnated in the electrode body.

17 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 5 ; and an electrolyte impregnated in the electrode body.

18 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 7 ; and an electrolyte impregnated in the electrode body.

19 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 8 ; and an electrolyte impregnated in the electrode body.

20 . A capacitor device comprising:
a battery case; an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 9 ; and an electrolyte impregnated in the electrode body.

Assignees

• Toyota Motor Co Ltd

Inventors

• Komura Shingo

Classifications

• H01G9/02

  Diaphragms; Separators · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title

• H01G11/52 Primary

  Separators · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0525 Primary

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