Collector, electrode structure, non-aqueous electrolyte cell, and electrical storage device

Patent metadata

Field	Value
Publication number	US-9336959-B2
Application number	US-201214235782-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Jul 29, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An object of the present invention is to provide a current collector which can decrease the internal resistance of a non-aqueous electrolyte battery, be used suitably for a non-aqueous electrolyte battery such as a lithium ion secondary battery and the like or for an electrical storage device such as a lithium ion capacitor and the like, and improve high rate characteristics. According to the present invention, a current collector which is structured by forming a resin layer possessing conductivity on at least one side of a conductive substrate is provided. The resin layer contains a chitosan-based resin and a conductive material, and the water contact angle of the surface of the resin layer measured by θ/2 method in a thermostatic chamber at 23° C. is 5 degrees or more and 60 degrees or less. In addition, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device which use the current collector are provided.

First claim

The invention claimed is:

1. A current collector comprising a resin layer possessing conductivity formed on at least one side of a conductive substrate, wherein
the resin layer contains a chitosan-based resin and a conductive material, and has a surface having a water contact angle of 5 degrees or more and 60 degrees or less, the water contact angle being measured by θ/2 method in a thermostatic chamber at 23° C.

2. The current collector of claim 1 , wherein the water contact angle is 15 degrees or more and 40 degrees or less.

3. The current collector of claim 1 , wherein the content of the conductive material is 30 to 100 parts by mass with respect to 100 parts by mass of the chitosan-based resin.

4. The current collector of claim 3 , wherein the content of the conductive material is 50 to 80 parts by mass with respect to 100 parts by mass of the chitosan-based resin.

5. The current collector of claim 1 , wherein
the chitosan-based resin comprises a chitosan derivative and an organic acid, and
the content of the organic acid is 20 to 300 parts by mass with respect to 100 parts by mass of the chitosan derivative.

6. The current collector of claim 5 , wherein the content of the organic acid is 50 to 150 parts by mass with respect to 100 parts by mass of the chitosan derivative.

7. The current collector of claim 1 , wherein the chitosan derivative has a weight average molecular weight of 30,000 to 500,000.

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

9. A non-aqueous electrolyte battery or an electrical storage device, comprising the electrode structure of claim 8 .

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

• H01G11/68 Primary

  characterised by their material · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01M4/667

  in the form of layers, e.g. coatings · CPC title