Electrode, redox flow battery, and method for producing electrode

Patent metadata

Field	Value
Publication number	US-2019260033-A1
Application number	US-201716346792-A
Country	US
Kind code	A1
Filing date	Dec 11, 2017
Priority date	Dec 13, 2016
Publication date	Aug 22, 2019
Grant date	—

Abstract

An object of the present invention is to provide an electrode which is used for a liquid flow-through device and in which liquid flow-through resistance is reduced and the utilization efficiency of the surface of carbon fiber is enhanced. Another object of the present invention is to provide a redox flow battery having excellent charge-discharge performance by use of the electrode which is used for the liquid flow-through device. The present invention provides an electrode to be used for a liquid flow-through device, the electrode including a plurality of sheets of carbon fiber nonwoven fabric each having irregularities on a surface of the sheet of carbon fiber nonwoven fabric being stacked or each having a through-hole on the carbon fiber sheet being stacked, and having inside of the electrode a plurality of gaps which is formed by recesses of the irregularities or the through-hole and is not opened in a thickness direction.

First claim

1 . An electrode to be used for a liquid flow-through device, the electrode comprising a plurality of carbon fiber sheets each having irregularities on a surface of the carbon fiber sheet being stacked or each having a through-hole on the carbon fiber sheet being stacked, and having inside of the electrode a plurality of gaps which is formed by recesses of the irregularities or the through-hole and is not opened in a thickness direction.

2 . The electrode according to claim 1 , which is used for a redox flow battery.

3 . The electrode according to claim 1 , wherein three or more of the carbon fiber sheets are stacked.

4 . The electrode according to claim 1 , wherein the plurality of carbon fiber sheets stacked are fixed together.

5 . The electrode according to claim 1 , wherein the irregularities of each of the carbon fiber sheets are a plurality of non-through-holes formed on a surface of each of the carbon fiber sheets.

6 . The electrode according to claim 1 , wherein each of the carbon fiber sheets has a plurality of through-holes.

7 . The electrode according to claim 1 , wherein the irregularities of each of the carbon fiber sheets are a plurality of grooves formed on a surface of each of the carbon fiber sheets.

8 . A redox flow battery comprising a cell formed including the electrode according to claim 1 .

9 . The redox flow battery according to claim 8 , wherein the cell is a flow-through type cell.

10 . The redox flow battery according to claim 8 , wherein the cell is a flow-by type cell.

11 . A method for producing an electrode to be used for a liquid flow-through device, the method comprising stacking a plurality of carbon fiber sheets each having irregularities on a surface of the carbon fiber sheet or each having a through-hole on the carbon fiber sheet such that a plurality of gaps which is formed by recesses of the irregularities or the through-hole and is not opened in a thickness direction is formed inside the electrode.

12 . The method for producing an electrode to be used for a liquid flow-through device according to claim 11 , wherein the plurality of carbon fiber sheets stacked is fixed together.

Assignees

• Toray Industries

Inventors

• Kajiwara Kentaro
• Utsunomiya Masamichi
• Watanabe Fumitaka
• Tanimura Yasuaki

Classifications

• H01M4/8657

  layered · CPC title

• H01M4/8885

  Sintering or firing · CPC title

• H01M4/8668

  Binders · CPC title

• H01M4/8896

  Pressing, rolling, calendering (membrane electrode assemblies H01M8/1004) · CPC title

• H01M8/188

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title