Electrode for electric storage device, electric storage device and manufacturing method of electrode for electric storage device

Patent metadata

Field	Value
Publication number	US-9048025-B2
Application number	US-201213675545-A
Country	US
Kind code	B2
Filing date	Nov 13, 2012
Priority date	Nov 14, 2011
Publication date	Jun 2, 2015
Grant date	Jun 2, 2015

Abstract

An electrode for an electric storage device includes at least an active material selected from the group consisting of a carbon nanotube, activated carbon, hard carbon, graphite, graphene and a carbon nanohorn; an ionic liquid; and a three-dimensional network metal porous body.

First claim

What is claimed is:

1. An electrode for an electric storage device comprising:
a three-dimensional network metal porous body having an average pore diameter of 50 μm or more and 1000 μm or less,
an active material containing carbon nanotube, and optionally at least one selected from the group consisting of activated carbon, hard carbon, graphite, graphene and a carbon nanohorn; and
an ionic liquid,
wherein said active material and said ionic liquid are kneaded to obtain a kneaded substance and said kneaded substance is contained in a pore of said three-dimensional network metal porous body.

2. The electrode for an electric storage device according to claim 1 , wherein said active material contains carbon nanotube and at least one selected from the group consisting of activated carbon, hard carbon, graphite, graphene and a carbon nanohorn.

3. The electrode for an electric storage device according to claim 1 , wherein said active material is a carbon nanotube.

4. The electrode for an electric storage device according to claim 1 , wherein a metal of said three-dimensional network metal porous body contains at least one selected from the group consisting of aluminum, nickel, copper, an aluminum alloy and a nickel alloy.

5. The electrode for an electric storage device according to claim 1 , wherein the metal of said three-dimensional network metal porous body is aluminum.

6. The electrode for an electric storage device according to claim 1 , wherein said electrode for an electric storage device does not contain a binder component.

7. The electrode for an electric storage device according to claim 1 , wherein said ionic liquid contains an organic solvent.

8. The electrode for an electric storage device according to claim 1 , wherein said carbon nanotube has a shape in which both ends of the carbon nanotube are opened.

9. The electrode for an electric storage device according to claim 1 , wherein said carbon nanotube has an average length in a range of 100 nm or more and 2000 μm or less.

10. The electrode for an electric storage device according to claim 1 , wherein said carbon nanotube has an average diameter in a range of 0.1 nm or more and 50 nm or less.

11. The electrode for an electric storage device according to claim 1 , wherein said carbon nanotube has a purity of 70% by mass or more.

12. An electric storage device comprising the electrode for an electric storage device according to claim 1 .

13. The electric storage device according to claim 12 , wherein said electric storage device is an electric double layer capacitor or a lithium-ion capacitor.

14. A manufacturing method of an electrode for an electric storage device comprising the step of:
kneading an active material containing a carbon nanotube and optionally at least one selected from the group consisting of activated carbon, hard carbon, graphite, graphene and a carbon nanohorn with an ionic liquid to produce a kneaded substance; and
allowing said kneaded substance to be contained in a pore of a three-dimensional network metal porous body having an average pore diameter of 50 μm or more and 1000 μm or less.

Assignees

• Sumitomo Electric Industries
• Meidensha Electric Mfg Co Ltd

Inventors

• Okuno Kazuki
• Hosoe Akihisa
• Majima Masatoshi
• Nakai Yoshihiro
• Noguchi Takayuki
• Komatsu Daisuke
• Iida Daisuke
• Yamamoto Masashi
• Kuramoto Masamichi

Classifications

• Y10S977/948

  Energy storage/generating using nanostructure, e.g. fuel cell, battery · CPC title

• B82Y99/00

  Subject matter not provided for in other groups of this subclass · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• H01G9/048 Primary

  characterised by their structure (H01G11/22 takes precedence) · CPC title