Collector and electrode structure, non-aqueous electrolyte cell, electrical double layer capacitor, lithium ion capacitor, or electrical storage device using same

Patent metadata

Field	Value
Publication number	US-9659716-B2
Application number	US-201214235785-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Jul 29, 2011
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

Provided is a technique to confirm the performance of the conductive resin layer of a current collector without actually preparing an electrode structure, a non-aqueous electrolyte battery, an electrical double layer capacitor, a lithium ion capacitor, or an electrical storage device, and to confirm the performance of the conductive resin layer easily with high accuracy by a non-destructive test. A current collector includes a conductive substrate and a resin layer possessing conductivity, the resin layer being formed on at least one side of the conductive substrate. The resin layer possessing conductivity contains a resin and a conductive material containing carbon as a main component. When the color tone of the surface of the resin layer possessing conductivity is specified with L*a*b* color system, L* is 60 or lower, a* is −1.0 to 1.0, and b* is −1.0 to 3.0.

First claim

The invention claimed is:

1. A current collector comprising:
a conductive substrate, and
a resin layer possessing conductivity provided on at least one side of the conductive substrate; wherein
the resin layer possessing conductivity includes a conductive particle and a resin;
an amount of the conductive particle is 60 to 80 parts by mass with respect to 100 parts by mass of the resin;
the resin contains a soluble nitrocellulose-based resin; and
a color tone of a surface of the resin layer possessing conductivity specified with L*a*b* color system, satisfies the following conditions of:
L*≦ 60
1.0≦ a*≦ 1.0

−1.0≦ b*≦ 3.0.

2. The current collector of claim 1 , wherein the color tone satisfies the following conditions, with respect to a thickness t (μm) of the resin layer possessing conductivity:
−5 t+ 25≦ L*≦− 5 t+ 70

−0.01 t− 0.3≦ a*≦− 0.01 t+ 0.7

0.01 t≦b*≦ 0.01 t+ 1.

3. The current collector of claim 1 , wherein the conductive particle contains carbon.

4. The current collector of claim 1 , wherein the surface of the resin layer possessing conductivity is exposed.

5. An electrode structure comprising:
the current collector of claim 1 , and
an active material layer or an electrode material layer formed on the resin layer possessing conductivity.

6. A non-aqueous electrolyte battery, an electrical double layer capacitor, a lithium ion capacitor, or an electrical storage device, comprising the electrode structure of claim 5 .

Assignees

• Kato Osamu
• Saito Sohei
• HONKAWA Yukiou
• Wasamoto Mitsuyuki
• Kadowaki Kenichi
• Yamabe Satoshi
• Uacj Corp
• Uacj Foil Corp

Inventors

• Kato Osamu
• Saito Sohei
• HONKAWA Yukiou
• Wasamoto Mitsuyuki
• Kadowaki Kenichi
• Yamabe Satoshi

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/662

  Alloys (collectors of lead alloys H01M4/685) · CPC title

• H01G11/48 Primary

  Conductive polymers · CPC title

• H01M4/668 Primary

  Composites of electroconductive material and synthetic resins · CPC title

• H01G11/28 Primary

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title