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Electrode for electrolysis and preparation method thereof

An electrode and a technology for preparing electrodes are applied in the direction of electrodes, electrolytic components, and electrolytic processes. It can solve problems such as complex manufacturing process results, insufficient electrode durability, and difficulty in setting conditions, and achieve excellent durability, reduce detachment, and reduce overheating. Effect of Voltage Requirement

Active Publication Date: 2021-02-23
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, these methods are disadvantageous in that they require additional raw materials, or it is difficult to set conditions and complicated manufacturing process results, and there is a problem that the durability of the electrode is insufficient

Method used

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  • Electrode for electrolysis and preparation method thereof
  • Electrode for electrolysis and preparation method thereof
  • Electrode for electrolysis and preparation method thereof

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preparation example Construction

[0054] In addition, the present invention provides a method for preparing an electrode for electrolysis, comprising the following steps:

[0055] preparing a coating solution for preparing an electrode, the coating solution containing a platinum group metal precursor, a rare earth metal precursor, an organic solvent and an amine solvent;

[0056] coating the coating solution for preparing an electrode on a metal substrate to form a catalyst layer;

[0057] drying the catalyst layer; and

[0058] The catalyst layer is heat-treated.

[0059] The electrode for electrolysis prepared according to the present invention significantly improves the overvoltage during battery operation and exhibits the effect of increasing the needle-like structure of the rare earth metal on the surface of the electrode. Therefore, the electrode has significantly improved durability, so that stable overvoltage efficiency can be ensured even after the reverse current phenomenon occurs.

[0060] In the...

Embodiment 1

[0094] By adding RuCl with a molar ratio of 6:1 3 ·nH 2 O and Ce(NO 3 ) 2 ·6H 2 The metal precursor of O was dissolved in a mixed solvent of isopropanol (IPA) and 2-butoxyethanol at a volume ratio of 1:1 to prepare the precursor solution. Subsequently, the precursor solution and the amine solvent (oleylamine) were mixed at a volume ratio of 2:1 to prepare a coating solution with a concentration of 100 g / L for preparing electrodes. The coating solution was brush-coated on a nickel mesh, dried at 200° C. for 10 minutes, and heat-treated at 500° C. for 10 minutes. This process was repeated ten times in total, and then heat-treated at 500° C. for 1 hour to obtain an electrode for electrolysis.

Embodiment 2

[0096] An electrode for electrolysis was prepared in the same manner as in Example 1 except that octylamine was used instead of oleylamine as the amine solvent.

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Abstract

The invention provides an electrode for electrolysis and a preparation method thereof. Compared with conventional electrodes, the electrode for electrolysis has an increased needle-like structure of rare earth metals, thus reducing detachment of catalytic materials, making the electrode excellent in durability, such as exhibiting stable performance even in reverse current. Furthermore, since the electrodes for electrolysis have a low overvoltage value, the overvoltage requirement of the electrolytic cell can be significantly reduced. In addition, an electrode for electrolysis having the above effects can be prepared without introducing additional precursors or changing manufacturing equipment.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No.10-2017-0102524 filed at the Korean Intellectual Property Office on August 11, 2017 and Korean Patent Application No.10-2018- filed at the Korean Intellectual Property Office on July 27, 2018 0087750, the disclosures of these two applications are fully incorporated into this specification by reference. [0003] The invention relates to an electrode for electrolysis and a preparation method thereof. More particularly, the present invention relates to an electrode for electrolysis capable of stabilizing an overvoltage value of the electrode for electrolysis and improving durability by adding a needle-like structure and a method for preparing the same. Background technique [0004] The chlor-alkali process is the production of chlorine gas (Cl 2 ) and sodium hydroxide (NaOH), which is industrially useful because it can mass-produce two substances wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/061C25B11/091C25B11/02C25B11/031C25B1/34
CPCC25B1/46C25B11/093
Inventor 郑钟郁黄教贤方晸业方龙珠李东哲金练伊严熙骏金明勋
Owner LG CHEM LTD