Electrode for Electrolysis

Patent metadata

Field	Value
Publication number	US-2022235477-A1
Application number	US-202117621966-A
Country	US
Kind code	A1
Filing date	Jan 8, 2021
Priority date	Jan 9, 2020
Publication date	Jul 28, 2022
Grant date	—

Abstract

The present disclosure relates to an electrode for electrolysis which includes a metal base layer, and a coating layer containing a ruthenium oxide, a cerium oxide, and a nickel oxide, wherein the coating layer is formed on at least one surface of the base layer. The electrode for electrolysis of the present disclosure is characterized by exhibiting excellent durability and improved overvoltage.

First claim

1 . An electrode for electrolysis, the electrode comprising:
a metal base layer; and a coating layer containing a ruthenium oxide, a cerium oxide, and a nickel oxide, wherein the coating layer is formed on at least one surface of the base layer.

2 . The electrode for electrolysis of claim 1 , wherein a molar ratio of a cerium element to a nickel element, which are contained in the coating layer, is in a range of 10:90 to 90:10.

3 . The electrode for electrolysis of claim 1 , wherein a molar ratio of a ruthenium element to a nickel element, which are contained in the coating layer, is in a range of 100:2 to 100:20.

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

5 . The electrode for electrolysis of claim 4 , wherein a molar ratio of a ruthenium element to a platinum group element, which are contained in the coating layer, is in a range of 100:2 to 100:20.

6 . A method of preparing an electrode for electrolysis, the method comprising:
applying a coating composition on at least one surface of a metal base; 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, a cerium precursor, and a nickel precursor.

7 . The method of claim 6 , wherein the coating composition further comprises a platinum group precursor.

8 . The method of claim 6 , wherein the ruthenium precursor is at least one selected from the group consisting of ruthenium hexafluoride (RuF 6 ), ruthenium(III) chloride (RuCl 3 ), ruthenium(III) chloride hydrate (RuCl 3 .xH 2 O), ruthenium(III) bromide (RuBr 3 ), ruthenium(III) bromide hydrate (RuBr 3 .xH 2 O), ruthenium iodide (RuI 3 ), and ruthenium acetate.

9 . The method of claim 6 , wherein the cerium precursor is at least one selected from the group consisting of cerium(III) nitrate hexahydrate (Ce(NO 3 ) 3 .6H 2 O), cerium (IV) sulfate tetrahydrate (Ce(SO 4 ) 2 .4H 2 O), and cerium(III) chloride heptahydrate (CeCl 3 .7H 2 O).

10 . The method of claim 6 , wherein the nickel precursor is at least one selected from the group consisting of nickel(II) chloride, nickel(II) nitrate, nickel(II) sulfate, nickel(II) acetate, and nickel(II) hydroxide.

11 . The method of claim 7 , wherein the platinum group precursor is at least one selected from the group consisting of chloroplatinic acid hexahydrate (H 2 PtCl 6 .6H 2 O), diamine dinitro platinum (Pt(NH 3 ) 2 (NO) 2 ), platinum(IV) chloride (PtCl 4 ), platinum(II) chloride (PtCl 2 ), potassium tetrachloroplatinate (K 2 PtCl 4 ), and potassium hexachloroplatinate (K 2 PtCl 6 ).

12 . The method of claim 6 , wherein the coating composition further comprises at least one amine-based additive selected from the group consisting of melamine, ammonia, urea, 1-propylamine, 1-butylamine, 1-pentylamine, 1-heptylamine, 1-octylamine, 1-nonylamine, and 1-dodecylamine.

13 . The method of claim 12 , wherein a ruthenium element of the ruthenium precursor and the amine-based additive, which are included in the coating layer, are included in a molar ratio of 100:30 to 100:90.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• C23C18/1283

  Control of temperature, e.g. gradual temperature increase, modulation of temperature · CPC title

• C23C18/1225

  Deposition of multilayers of inorganic material · CPC title

• C25B11/061

  Metal or alloy · CPC title

• C23C18/1241

  Metallic substrates · CPC title

• C23C18/1216

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