Electrode for Electrolysis

Patent metadata

Field	Value
Publication number	US-2022364250-A1
Application number	US-202017621358-A
Country	US
Kind code	A1
Filing date	Dec 14, 2020
Priority date	Dec 19, 2019
Publication date	Nov 17, 2022
Grant date	—

Abstract

The present disclosure relates to an electrode for electrolysis, in which a structure of a metal base layer is optimized, and a preparation method thereof, wherein the electrode for electrolysis of the present invention exhibits an overvoltage improved in comparison to a conventional electrode while having excellent durability due to a small loss of a coating layer.

First claim

1 . An electrode for electrolysis, the electrode comprising:
a metal base layer; and a coating layer containing a ruthenium oxide and nitrogen, wherein the metal base layer has a mesh structure with a mesh size of 45 mesh to 60 mesh, an individual wire thickness of the mesh structure is in a range of 100 μm to 160 μm, and a nitrogen content in the coating layer is in a range of 30 mol % to 70 mol % based on the ruthenium oxide.

2 . The electrode for electrolysis of claim 1 , wherein the mesh size of the metal base layer is in a range of 50 mesh to 60 mesh.

3 . The electrode for electrolysis of claim 1 , wherein the individual wire thickness of the mesh structure is in a range of 120 μm to 150 μm.

4 . The electrode for electrolysis of claim 1 , wherein the coating layer further contains a cerium oxide.

5 . The electrode for electrolysis of claim 4 , wherein a molar ratio of a ruthenium element to a cerium element in the coating layer is in a range of 100:5 to 100:30.

6 . The electrode for electrolysis of claim 1 , wherein the coating layer further contains a platinum oxide.

7 . The electrode for electrolysis of claim 6 , wherein a molar ratio of a ruthenium element to a platinum element in the coating layer is in a range of 100:2 to 100:20.

8 . A method of preparing an electrode for electrolysis, the method comprising:
applying a coating composition on at least one surface of a metal base having a mesh structure in which a mesh size is in a range of 45 mesh to 60 mesh and an individual wire thickness of the mesh structure is in a range of 100 μm to 160 μm; and coating by drying and heat-treating the metal base on which the coating composition has been applied, wherein the coating composition comprises a ruthenium precursor and an amine-based additive in a molar ratio of 100:20 to 100:40.

9 . The method of claim 8 , wherein the amine-based additive is at least one selected from the group consisting of melamine, ammonia, urea, 1-propylamine, 1-butylamine, 1-pentylamine, 1-heptylamine, 1-octylamine, 1-nonylamine, and 1-dodecylamine.

10 . The method of claim 8 , wherein the coating composition further comprises a cerium precursor and a platinum precursor.

Assignees

• Lg Chemical Ltd

Inventors

• Eom Hee Jun
• Lee Dong Chul
• Kim Yeon Yi
• Kim Myung Hun

Classifications

• C23C18/1241

  Metallic substrates · CPC title

• C25B1/34

  Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis · CPC title

• C23C18/1216

  Metal oxides (C23C18/1212 takes precedence) · CPC title

• C25B11/061

  Metal or alloy · CPC title

• C25B11/093 Primary

  at least one noble metal or noble metal oxide and at least one non-noble metal oxide · CPC title