Electrode for Electrolysis

Patent metadata

Field	Value
Publication number	US-2022349075-A1
Application number	US-202017621532-A
Country	US
Kind code	A1
Filing date	Dec 16, 2020
Priority date	Dec 19, 2019
Publication date	Nov 3, 2022
Grant date	—

Abstract

The present technology relates to an electrode for electrolysis which has a coating layer containing an ytterbium oxide, wherein the electrode for electrolysis of the present technology is characterized by exhibiting excellent durability and improved overvoltage. Further, the present technology relates to a method of preparing an electrode for electrolysis which includes: 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 includes a ruthenium precursor and an ytterbium precursor.

First claim

1 . An electrode for electrolysis, the electrode comprising:
a metal base layer; and a coating layer containing a ruthenium oxide and an ytterbium 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 ruthenium element to an ytterbium element, which are contained in the coating layer, is in a range of 100:5 to 100:30.

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

4 . The electrode for electrolysis of claim 3 , 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.

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

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

7 . 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 forming 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 ytterbium precursor.

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

9 . The method of claim 7 , wherein the coating composition further comprises a cerium precursor.

10 . The method of claim 7 , 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.

11 . The method of claim 7 , wherein the ytterbium precursor is at least one selected from the group consisting of ytterbium carboxylate, ytterbium nitrate, ytterbium carbonate, ytterbium chloride, ytterbium fluoride, ytterbium oxide, ytterbium sulfonate, and hydrates thereof.

12 . The method of claim 8 , 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 ).

13 . The method of claim 9 , 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).

14 . The method of claim 7 , 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.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• C25B11/061

  Metal or alloy · CPC title

• C25B11/052 Primary

  Electrodes comprising one or more electrocatalytic coatings on a substrate · CPC title

• C25B1/46

  in diaphragm cells · CPC title

• C25B11/093 Primary

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

• C23C18/1225

  Deposition of multilayers of inorganic material · CPC title