Electrode for electrolysis

An electrode and coating technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve problems such as overvoltage and reverse current deterioration, and achieve the effects of excellent overvoltage, excellent alkaline durability, and excellent conductivity

Pending Publication Date: 2022-02-01
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an overvoltage phenomenon occurs, and a problem of deterioration due to reverse current occurs

Method used

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  • Electrode for electrolysis
  • Electrode for electrolysis

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preparation example Construction

[0041] In the method for producing an electrode for electrolysis of the present invention, the metal base may be the same as that of the electrode for electrolysis described previously.

[0042] In the method of preparing an electrode for electrolysis of the present invention, the coating composition may contain a ruthenium precursor, a cerium precursor, and a nickel precursor. After coating, the precursors are converted to oxides by being oxidized in a heat treatment step.

[0043] The use of the ruthenium precursor may not be particularly limited as long as it is a compound capable of forming a ruthenium oxide, which may be, for example, a hydrate, hydroxide, halide or oxide of ruthenium, and may be specifically selected from 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 at least one o...

Embodiment 1

[0068] Mix 1g of ruthenium precursor, 0.3135g of cerium precursor, 0.057g of nickel precursor and 0.1625g of platinum group precursor in 10ml of the mixed solvent of the above materials at a molar ratio of 5:0.75:0.25:0.5, so that the concentration of ruthenium is 100g After / L, 0.181 g of urea was added at a molar ratio of 3.13 as an amine additive. The mixed solution was stirred overnight at 50° C. to prepare a coating composition. The coating composition is coated on the pretreated nickel substrate, and the coated nickel substrate is placed in a convection drying oven at 180°C for 10 minutes to dry, and then placed in an electric heating furnace at 500°C for heat treatment for 10 minutes. After the above coating, drying and heat treatment process was repeated 9 times, the final electrode for electrolysis was finally prepared by performing heat treatment at 500° C. for 1 hour in an electric heating furnace.

Embodiment 2

[0070] An electrode for electrolysis was prepared in the same manner except that the molar ratio of the ruthenium precursor, the cerium precursor, the nickel precursor and the platinum group precursor in Example 1 was 5:0.5:0.5:0.5.

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Abstract

The present invention relates to an electrode for electrolysis comprising a coating layer containing nickel oxide, the electrode for electrolysis according to the present invention exhibiting excellent durability and improvement against overvoltage.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims priority from Korean Patent Application No. 10-2020-0003208 filed on Jan. 9, 2020, the disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to an electrode for electrolysis capable of improving overvoltage and a method for preparing the electrode for electrolysis. Background technique [0004] The production of hydroxides, hydrogen and chlorine by low-cost electrolysis of brines such as seawater is well known. This electrolytic process is also known as the chlor-alkali process and can be considered a method that has proven its performance and technical reliability in commercial operation for decades. [0005] For the electrolysis of brine, the most widely used method at present is the ion exchange membrane method, in which an ion exchange membrane is installed in the electrolytic cell to divide the electrolytic cell ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/052C25B11/093C25B11/061C25B1/34
CPCC25B11/052C25B11/093C25B11/061C25B1/34C25B1/46C23C18/1241C23C18/1216C23C18/1283C23C18/1225C25B11/095C25B11/063C25B1/04C25B1/26
Inventor 金明勋金缘伊严熙骏李东哲
Owner LG CHEM LTD
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