Composite electrode for desalination comprising ion-exchange membrane, manufacturing method thereof, and desalination apparatus using same

• US 10,301,201 B2
• Filed: 03/30/2016
• Issued: 05/28/2019
• Est. Priority Date: 10/23/2013
• Status: Active Grant

• Current Assignee: Amogreentech Co., Ltd.
• Original Assignee: Amogreentech Co., Ltd.
• Inventors: Seo, In Yong, Hwang, Jun Sik
• Primary Examiner(s): Jain, Salil
• Application Number:
  US15/084,988
• Publication Number:
  US 20160207800A1
• Time in Patent Office: 1,154 Days
• CPC Class Codes: B01D 2313/345 Electrodes
• CPC Class Codes: B01D 2323/26 Spraying processes
• CPC Class Codes: B01D 2325/42 Ion-exchange membranes
• CPC Class Codes: B01D 69/02 characterised by their properties
• CPC Class Codes: B01D 69/10 Supported membranes; Membrane supports
• CPC Class Codes: B01D 69/1071 Woven, non-woven or net mesh
• CPC Class Codes: C02F 1/46114 Electrodes in particulate form or with conductive and/or non conductive particles between them
• CPC Class Codes: C02F 1/4691 Capacitive deionisation
• CPC Class Codes: C02F 1/4695 electrodeionisation
• CPC Class Codes: C02F 2001/46138 Electrodes comprising a substrate and a coating
• CPC Class Codes: C02F 2001/46161 Porous electrodes
• CPC Class Codes: C02F 2001/46171 Cylindrical or tubular shaped
• CPC Class Codes: C02F 2103/08 Seawater, e.g. for desalination
• CPC Class Codes: C02F 2201/46 Apparatus for electrochemical processes

Abstract

Provided are a deionization composite electrode, a method of manufacturing the deionization composite electrode, and a deionization apparatus using the same. The deionization composite electrode includes: a porous substrate having fine pores; an ion exchange membrane that is formed by electrospraying an ion exchange solution on one surface of the porous substrate; and a conductive film that is formed on the other surface of the porous substrate.

Claims

1. A deionization composite electrode comprising:

a porous ion exchange substrate formed of a nanofiber web, the nanofiber web being formed of accumulated nanofibers and having pores, wherein the nanofibers are formed by electro spinning a first ion exchange solution;

an electrically conductive film formed on both surfaces of the porous ion exchange substrate, the electrically conductive film being formed of a conductive material, a portion of which is penetrated into the pores of the porous ion exchange substrate, wherein the electrically conductive film is formed by depositing the conductive material; and

a non-porous ion exchange membrane formed on a surface of one of the electrically conductive films, wherein the non-porous ion exchange membrane is formed by electrospraying a second ion exchange solution on the surface of the one of the electrically conductive films.

2. The deionization composite electrode of claim 1, wherein the porous ion exchange substrate includes a nonwoven fabric.

3. The deionization composite electrode of claim 1, further comprising a coat layer coated on a surface of the other one of the electrically conductive films.

4. The deionization composite electrode of claim 1, wherein the nanofibers have a diameter of 50 nm to 1500 nm.

5. The deionization composite electrode of claim 1, wherein the pores have a size of 0.1 μ

m to 10 μ

m.

6. A deionization apparatus comprising:

a first deionization composite electrode and a second deionization composite electrode facing and spaced apart from the first deionization composite electrode, wherein each of the first deionization composite electrode and the second deionization composite electrode comprises a deionization composite electrode according to claim 1.

7. The deionization apparatus of claim 6, further comprising a spacer between the first deionization composite electrode and the second deionization composite electrode, wherein a flow path through which water to be treated passes is formed in the spacer.

8. The deionization apparatus of claim 7, wherein the first deionization composite electrode, the spacer, and the second deionization composite electrode are sequentially laminated and spirally rolled.

9. The deionization apparatus of claim 7, further comprising a filter module capable of filtering heavy metal ions and bacterial materials from purified water.

10. The deionization apparatus of claim 9, wherein the filter module comprises:

a silver (Ag) mesh module for removing the heavy metal ions from the purified water; and

a nanofiber web fixed to the Ag mesh module thereby filtering the bacterial materials from the purified water from which the heavy metal ions have been removed.

11. The deionization apparatus of claim 10 wherein the filter module comprises a repeatedly laminated structure of the silver mesh module and the nanofiber web fixed to the Ag mesh module.

12. The deionization apparatus of claim 10, wherein the nanofiber web fixed to the Ag mesh module comprises a nanofiber web in which nanofibers containing silver nano-materials are laminated.