Electrochemical reaction device

Patent metadata

Field	Value
Publication number	US-2017130342-A1
Application number	US-201715412416-A
Country	US
Kind code	A1
Filing date	Jan 23, 2017
Priority date	Nov 28, 2014
Publication date	May 11, 2017
Grant date	—

Abstract

An electrochemical reaction device comprises: an electrolytic solution tank including a first region, a second region, and a path; a reduction electrode disposed in the first region; an oxidation electrode disposed in the second region; and a power source connected to the reduction electrode and oxidation electrode; and a plurality of ion exchange membranes separating the first region and the second region.

First claim

What is claimed is:

1 . An electrochemical reaction device, comprising:
an electrolytic solution tank including a first region to store a first electrolytic solution containing a first substance, a second region to store a second electrolytic solution containing a second substance, and a path connecting between the first region and the second region; a reduction electrode disposed in the first region; an oxidation electrode disposed in the second region; a power source connected to the reduction and oxidation electrodes; and a plurality of ion exchange membranes separating the first region and the second region.

2 . The device according to claim 1 ,
wherein a plurality of the ion exchange membranes include: a first ion exchange membrane to hinder one kind or more of anions in the first electrolytic solution from passing therethrough; and a second ion exchange membrane to hinder one kind or more of cations in the second electrolytic solution from passing therethrough.

3 . The device according to claim 2 , further comprising
a bipolar membrane including a laminate, the laminate having the first ion exchange membrane composed of a cation exchange membrane and the second ion exchange membrane composed of an anion exchange membrane.

4 . The device according to claim 2 ,
wherein the electrolytic solution tank further includes a third region between the first ion exchange membrane and the second ion exchange membrane, the third region configured to store a third electrolytic solution, and the third electrolytic solution contains ions for no reduction reaction of the first substance or no oxidation reaction of the second substance.

5 . The device according to claim 4 , the device is configured to desalt the third electrolytic solution.

6 . The device according to claim 4 , further comprising:
a second path connecting between the first region or the second region and the third region.

7 . The device according to claim 1 ,
wherein the first substance includes carbon dioxide, and the second substance includes water.

8 . The device according to claim 1 ,
wherein the second electrolytic solution has a pH higher than a pH of the first electrolytic solution.

9 . The device according to claim 1 ,
Wherein the power source has a photoelectric conversion body having a first surface connected to the reduction electrode and a second surface connected to the oxidation electrode.

10 . The device according to claim 9 ,
wherein the path is composed of a hole disposed through the reduction electrode, the oxidation electrode, and the photoelectric conversion body.

11 . The device according to 10 ,
wherein the through hole has a slit shape.

12 . The device according to claim 1 ,
wherein the electrolytic solution tank has a pipe-shaped structure, and one of the first and second regions is surrounded by the other of the first and second regions along an inner periphery of the electrolytic solution tank.

13 . The device according to claim 1 ,
wherein the reduction electrode contains a reduction catalyst, and the oxidation electrode contains an oxidation catalyst.

14 . The device according to claim 1 , further comprising
a circulating pump provided at the path.

Assignees

• Toshiba Kk

Inventors

• Ono Akihiko
• Mikoshiba Satoshi
• Tamura Jun
• Yoshinaga Norihiro
• Sugano Yoshitsune

Classifications

• C25B15/08

  Supplying or removing reactants or electrolytes; Regeneration of electrolytes · CPC title

• C25B13/08

  based on organic materials · CPC title

• C25B1/10

  Chemistry & Metallurgy · mapped topic

• H01G9/2013

  the electrolyte comprising ionic liquids, e.g. alkyl imidazolium iodide · CPC title

• C25B1/003 Primary

  Chemistry & Metallurgy · mapped topic