Electrolytic solution for electric double-layer capacitor, and electric double-layer capacitor

Patent metadata

Field	Value
Publication number	US-2015340168-A1
Application number	US-201314410253-A
Country	US
Kind code	A1
Filing date	Jun 24, 2013
Priority date	Jun 22, 2012
Publication date	Nov 26, 2015
Grant date	—

Abstract

An electric double-layer capacitor is provided which is larger in electrostatic capacitance, and can be much higher in rated voltage, than that in the prior art using a liquid electrolyte solely composed of an ionic liquid. Having an electrolyte and electrodes, the capacitor incorporates an atom encapsulated fullerene or an atom encapsulated fullerene salt in the electrolyte. The electrolyte can either be a liquid solution or a solid. With the electrolyte being a solid, cations of the atom encapsulated fullerene or atom encapsulated fullerene salt may either be made movable or static in the electrolyte.

First claim

1 . An electric double-layer capacitor having an electrolyte and electrodes, wherein the capacitor incorporates an atom encapsulated fullerene or a salt thereof in said electrolyte.

2 . An electric double-layer capacitor as set forth in claim 1 wherein said electrolyte is had in the form of a liquid solution thereof.

3 . An electric double-layer capacitor as set forth in claim 1 wherein said electrolyte is had in the form of a solid thereof.

4 . An electric double-layer capacitor as set forth in claim 3 wherein cations of the atom encapsulated fullerene or salt thereof are movable in said electrolyte.

5 . An electric double-layer capacitor as set forth in claim 3 wherein cations of the atom encapsulated fullerene or salt thereof are static in said electrolyte.

6 . An electric double-layer capacitor as set forth in claim 5 wherein the atom encapsulated fullerene is crystallographically configured.

7 . An electric double-layer capacitor as set forth in claim 1 wherein said atom is of a metal.

8 . An electric double-layer capacitor as set forth in claim 7 wherein said metal is an alkali metal.

9 . An electric double-layer capacitor as set forth in claim 1 .

10 . An electric double-layer capacitor as set forth in claim 1 wherein counterpart ions of the atom encapsulated fullerene are ones selected from the class which consists of Cl − , Br − , F − , I − , ClO 3 − , ClO 4 − , BF 4 − , AlCl 4 − , PF 6 − , SbCl 6 − and SbF 6 − .

11 . An electric double-layer capacitor as set forth in claim 6 wherein counterpart ions of the atom encapsulated fullerene are of a diameter smaller than a minimum distance across a spacing formed of the atom encapsulated fullerene that is crystallographically configured.

12 . An electric double-layer capacitor as set forth in claim 2 wherein said liquid solution is one of an ionic liquid and an organic solvent.

13 . An electric double-layer capacitor as set forth in claim 1 wherein said atom encapsulated fullerene salt is Li@C 60 .PF 6 .

14 . An electric double-layer capacitor as set forth in claim 1 wherein a said electrode is formed of a porous material.

15 . An electric double-layer capacitor as set forth in claim 1 wherein a said electrode is composed of silver.

16 . An electrolyte for an electric double-layer capacitor, wherein the electrolyte contains an atom encapsulated fullerene therein.

17 . An electric double-layer capacitor as set forth in claim 2 wherein said atom is of a metal.

18 . An electric double-layer capacitor as set forth in claim 3 wherein said atom is of a metal.

19 . An electric double-layer capacitor as set forth in claim 4 wherein said atom is of a metal.

20 . An electric double-layer capacitor as set forth in claim 5 wherein said atom is of a metal.

Assignees

• Idea Internat Inc
• Univ Tohoku

Inventors

• Kwon Eunsang
• Kasama Yasuhiko
• Kawachi Kazuhiko
• Komatsu Kenichiro

Classifications

• H01G11/54 Primary

  Electrolytes · CPC title

• H01G11/30

  characterised by their material · CPC title

• H01G11/62

  characterised by the solute, e.g. salts, anions or cations therein · CPC title

• H01G11/24

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title

• H01G11/64

  characterised by additives · CPC title