Oxygen electrode comprising dual plating catalyst, water electrolysis device and regenerative fuel cell comprising the same, and method for preparing the oxygen electrode

Patent metadata

Field	Value
Publication number	US-2020131657-A1
Application number	US-201916590857-A
Country	US
Kind code	A1
Filing date	Oct 2, 2019
Priority date	Oct 26, 2018
Publication date	Apr 30, 2020
Grant date	—

Abstract

The present disclosure relates to an oxygen electrode comprising a dual plating catalyst, a water electrolysis device and a regenerative fuel cell comprising the same, and a method for preparing the oxygen electrode.

First claim

1 . An oxygen electrode, comprising:
a substrate; a platinum (Pt) layer formed on the substrate by electroplating; and an iridium oxide layer formed on the Pt layer by electroplating.

2 . The oxygen electrode of claim 1 , wherein the oxygen electrode is for a water electrolysis device.

3 . The oxygen electrode of claim 1 , wherein the oxygen electrode is for regenerative fuel cells.

4 . The oxygen electrode of claim 1 , wherein the Pt layer comprises Pt particles adhered to the substrate.

5 . The oxygen electrode of claim 1 , wherein the iridium oxide layer comprises iridium oxide particles surrounding the Pt layer or Pt particles.

6 . The oxygen electrode of claim 1 , wherein the Pt layer has a weight of 0.05 mg/cm 2 to 0.7 mg/cm 2 .

7 . The oxygen electrode of claim 1 , wherein the Pt layer and iridium oxide layer have a total weight of 0.1 mg/cm 2 to 1.0 mg/cm 2 .

8 . The oxygen electrode of claim 1 , wherein the substrate is a titanium paper composed of titanium fibers.

9 . The oxygen electrode of claim 1 , wherein the oxygen electrode is used for a regenerative fuel cell operated at a current density of 0.1 A/cm 2 .

10 . A water electrolysis device comprising the oxygen electrode according to claim 1 .

11 . A regenerative fuel cell comprising the oxygen electrode according to claim 1 .

12 . The regenerative fuel cell of claim 11 , wherein the regenerative fuel cell is a unitized regenerative fuel cell (URFC).

13 . A method for preparing the oxygen electrode according to claim 1 , comprising:
forming a platinum (Pt) layer on a substrate by electroplating; and forming an iridium oxide layer on the Pt layer by electroplating.

14 . The method for preparing the oxygen electrode of claim 13 , wherein forming a Pt layer on the substrate by electroplating involves controlling at least one of a plating current and a plating time.

15 . The method for preparing the oxygen electrode of claim 14 , wherein the plating current is −100 mA cm′ to −5 A cm −2 .

16 . The method for preparing the oxygen electrode of claim 14 , wherein the plating time is 30 seconds to 10 minutes.

Assignees

• Korea Inst Sci & Tech

Inventors

• Park Hyun Seo
• Jang Jong Hyun
• Park Hee-Young
• Kim Jin Young
• Lee So Young
• Yoo Sung Jong
• Henkensmeier Dirk
• Kim Hyoung-Juhn
• Lim Ahyoun
• Kim Junyoung
• Lee Hye Jin

Classifications

• C25B1/04 Primary

  by electrolysis of water · CPC title

• H01M4/8657

  layered · CPC title

• C25D9/08

  by cathodic processes · CPC title

• H01M8/18

  Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title

• C25D3/50

  of platinum group metals · CPC title