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Electrochemical anode preparation method and electrochemical anode

An electrochemical and anode technology, applied in the field of electrolysis of electrolytic cells, can solve the problems of active coating shedding, electrochemical corrosion of titanium substrates, and impact on the service life of titanium anodes, and achieve the effect of avoiding shedding.

Active Publication Date: 2019-09-20
HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And, especially for the active coating containing pores or cracks, in the environment containing hydrochloric acid and sulfuric acid, when the active coating is affected by the acidic environment, it will also cause the titanium substrate to be susceptible to electrochemical corrosion by hydrochloric acid and sulfuric acid. The titanium substrate is subjected to electrochemical corrosion, and the active coating and the titanium substrate are peeled off
Due to the disadvantages of easy chemical dissolution and abnormal shedding of the active coating, the service life of titanium anodes is greatly affected

Method used

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  • Electrochemical anode preparation method and electrochemical anode
  • Electrochemical anode preparation method and electrochemical anode
  • Electrochemical anode preparation method and electrochemical anode

Examples

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Embodiment 1

[0018] This embodiment provides a method for preparing an electrochemical anode, which includes using a porous metal material as a substrate, preparing an intermediate layer containing metal oxide on the surface of the substrate, and preparing a non-metallic conductive electrode on the surface of the intermediate layer containing metal oxide. The surface layer forms the finished electrochemical anode.

[0019] In the electrochemical anode of this embodiment, the non-metal conductive surface layer is located on the surface layer of the electrochemical anode. Since the chemical dissolution rate of the material mainly depends on the metallicity of the material, for metals, metal oxides and non-metallic materials, the metallicity decreases in turn, and the lower the metallicity, the slower the chemical dissolution rate. Therefore, in order to avoid hydrochloric acid or Sulfuric acid and other acid-containing environments are chemically dissolved. In this embodiment, non-metallic m...

experiment example 1

[0025] In this experimental example, a sandblasted titanium plate is used as the substrate, lead dioxide with different thicknesses is used as the middle layer containing metal oxides, and graphene layers with different thicknesses are used as the non-metallic conductive surface layer. 2 The life situation in the accelerated environment, analysis results. details as follows:

[0026] A sandblasting titanium plate with a thickness of 2 mm is selected, that is, the titanium plate is subjected to sandblasting treatment, and the surface of the titanium plate is cleaned after the sandblasting treatment as a base material. Combine lead dioxide and an appropriate amount of organic particles with the substrate through composite electroplating or composite coating or electroplating and coating. The middle layer of the structure to increase the specific surface area and reduce the current density to reduce energy consumption. Finally, 0 μm, 2 μm, and 5 μm graphene were sprayed on the ...

experiment example 2

[0031] In this experimental example, the porous titanium plate is used as the base material, the lead dioxide of different thickness is used as the intermediate layer containing metal oxide, and the graphene layer of different thickness is used as the non-metallic conductive surface layer. 2 The life situation in the accelerated environment, analysis results. details as follows:

[0032] A porous titanium plate with a thickness of 2 mm was selected as the substrate. Combine lead dioxide and an appropriate amount of organic particles with the substrate through composite electroplating or composite coating or electroplating and coating. The middle layer of the structure to increase the specific surface area and reduce the current density to reduce energy consumption. Finally, 0 μm, 2 μm, and 5 μm graphene were sprayed on the middle layer of lead dioxide and heated and cured to form a non-metallic conductive surface layer. In 1m sulfuric acid, 2A / cm 2 Test in an accelerated e...

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Abstract

The invention discloses an electrochemical anode preparation method and an electrochemical anode. The preparation method includes the steps: taking a porous metal material as a base material; preparing a middle layer containing metallic oxide on the surface of the base material; preparing a non-metallic conductive surface layer on the surface of the middle layer. The electrochemical anode comprises the porous metal material serving as the base material, the middle layer containing the metallic oxide and the non-metallic conductive surface layer. According to the electrochemical anode, the non-metallic conductive surface layer is used as the surface layer of the electrochemical anode, falling of the non-metallic conductive surface layer due to chemical dissolution in acid-containing environments with hydrochloric acid or sulfuric acid and the like is avoided, and the performance of the electrochemical anode cannot be affected. Besides, the electrochemical anode comprises the porous metal material serving as the base material, the middle layer containing the metallic oxide and the non-metallic conductive surface layer from inside to outside and gradually changes from metallicity to metalloid characters. Compared with direct recombination of the porous metal material serving as the base material and the non-metallic conductive surface layer, connection is closer, and falling of the non-metallic conductive surface layer is avoided.

Description

technical field [0001] The present application relates to the technical field of electrolysis of an electrolytic cell, and in particular, relates to a method for preparing an electrochemical anode and the electrochemical anode. Background technique [0002] At present, the titanium anode used in the electrolysis of the electrolytic cell is generally composed of two parts: a titanium substrate and an active coating. In traditional titanium anodes, the active coating generally has two major disadvantages: easy chemical dissolution and easy to fall off abnormally. Among them, the active coating is easy to chemically dissolve mainly because the chemical dissolution depends on the chemical characteristics of the active coating and the environment in which it is used. In traditional titanium anodes, the active coating is mainly composed of metal oxides. For environments containing hydrochloric acid and sulfuric acid, it is well known that , the active coating containing metal oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/10C25C7/02
CPCC25C7/02C25B11/031C25B11/091
Inventor 刘碧华夏敏冯伟李祁明罗国华刘剑锋
Owner HUIZHOU ZHENDING ENVIRONMENTAL PROTECTION TECH CO LTD
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