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CN-118621392-B - Electrolytic water anode plate net, preparation method thereof and electrolytic device

CN118621392BCN 118621392 BCN118621392 BCN 118621392BCN-118621392-B

Abstract

The invention discloses an electrolytic water anode plate net, a preparation method thereof and an electrolysis device, and relates to the technical field of hydrogen production by water electrolysis. By adopting a collision embedding method, electrolytic nickel powder is deposited on the surface of the preheated nickel plate net, and a catalytic working layer with a micro-nano structure can be stably prepared in a large area by regulating and controlling deposition conditions, so that the electrolytic catalytic performance of electrolysis is improved. Compared with the plasma spraying deposition of Raney nickel, the method provided by the invention has the advantages that the step of activating alkaline liquor in the later period can be omitted, the preparation efficiency is greatly improved, the equipment, maintenance and manufacturing costs are greatly reduced, the environment pollution caused by an alkaline dealumination activator is avoided, and compared with the plasma spraying deposition of Raney nickel, the micro-nano double-scale structure working layer prepared by the method is controllable in micrometer and nanometer scale and three-dimensional in structure, the electrolytic catalysis performance of an electrode can be further improved, and the method has a very good application prospect.

Inventors

  • ZHANG YANG
  • ZHANG SHUANGLONG
  • ZHAO YAHU

Assignees

  • 邯郸市科领新材料有限公司

Dates

Publication Date
20260505
Application Date
20240627

Claims (12)

  1. 1. The preparation method of the electrolytic water anode plate net is characterized by comprising the steps of preheating a nickel plate net, and depositing electrolytic nickel powder on the surface of the nickel plate net by adopting a collision embedding method; the collision embedding is to accelerate the electrolytic nickel powder by utilizing high-pressure inert gas through a spray pipe, and the accelerated powder is collided and embedded into the nickel plate net; The surface of the electrolytic nickel powder is provided with bulges smaller than 5 mu m, and the electrolytic nickel powder is dendritic, wherein the average size of the powder of the electrolytic nickel powder is 5 mu m-120 mu m, and the temperature of the powder is smaller than 100 ℃; The gas pressure of the high-pressure inert gas is 3MPa-10MPa, the gas temperature is less than 100 ℃, and the powder embedding speed is controlled to be 100m/s-500m/s; the nickel plate mesh is pretreated before the electrolytic nickel powder is deposited, so that the roughness of the nickel plate mesh is more than 5 mu m.
  2. 2. The method of claim 1, wherein the high pressure inert gas is unheated argon.
  3. 3. The production method according to claim 1, wherein the preheating is heating the nickel plate mesh to 500 ℃ or higher.
  4. 4. A method of preparation according to claim 3, wherein the preheating temperature is 500 ℃ to 600 ℃.
  5. 5. The method of claim 4, wherein the nickel screen is preheated using a high frequency electromagnetic induction heating system, and the operating frequency is controlled to be greater than 200Hz.
  6. 6. The method according to claim 1, wherein the mesh number of the nickel plate mesh is 40 mesh to 60 mesh.
  7. 7. The method according to claim 1, wherein the pretreatment comprises blasting the nickel plate net to meet the roughness requirement, and then washing and drying.
  8. 8. The method of claim 7, wherein the plate work is protected prior to depositing the electrolytic nickel powder.
  9. 9. An electrolyzed water anode web prepared by the preparation method of any one of claims 1 to 8.
  10. 10. The electrolyzed water anode screen according to claim 9, wherein the deposited powder particles have a longitudinal deformation compression of <20% and a depth of embedding into the surface of the nickel screen of >0.5 μm.
  11. 11. The electrolyzed water anode screen according to claim 9, wherein the coating on the nickel screen has a bonding strength with the screen of more than 5MPa and a coating thickness of 40 μm to 100 μm.
  12. 12. An electrolysis apparatus comprising an electrolyzed water anode web according to any one of claims 9 to 11.

Description

Electrolytic water anode plate net, preparation method thereof and electrolytic device Technical Field The invention relates to the technical field of hydrogen production by water electrolysis, in particular to an anode plate net for water electrolysis, a preparation method thereof and an electrolysis device. Background With the gradual implementation of green low-carbon energy development strategy and the actual requirements of environmental pollution treatment and carbon emission reduction, the development of renewable energy is more and more powerful, but serious electricity rejection is generated. The hydrogen is produced by utilizing the electrolyzed water, the waste electricity is used for producing the hydrogen, the hydrogen is an effective way for realizing the conversion, the storage and the reutilization of renewable energy sources, and the development of the renewable energy sources can be effectively promoted. The alkaline water electrolysis hydrogen production is a mature and safe hydrogen production method, but the method has higher energy consumption and limits the application of the method in the field of electric hydrogen production. Compared with pure nickel, the nickel-based alloy has better catalytic hydrogen evolution activity, such as nickel-molybdenum alloy, nickel-molybdenum-sulfur alloy, nickel-cobalt alloy and the like, but the alloy is unstable in a strong alkaline electrolytic solution, and the appearance of dissolution of metal elements exists, so that the catalytic hydrogen evolution performance of the electrode is gradually reduced, and the catalytic performance of the electrode is gradually deteriorated after long-term use. The electrode is prepared by directly spraying micron-sized nickel-aluminum mixed powder, taking Al as a pore-forming agent, and activating the coating by alkali liquor before installation. However, the electrolysis has the problems of long production period, serious environmental pollution, limited pore-forming capability and the like. In summary, the existing mainstream plasma spraying method preliminarily meets the technical requirement of pore-forming on the surface of a pure nickel plate net, but still has the problem of lower catalytic performance. This is probably due to the limited pore-forming capacity of the existing preparation method, poor interfacial bonding and poor activation stability of the product. At present, a pure nickel plate net with a micro-nano structure surface is needed to be prepared, the process of activating later alkali liquor is omitted, and meanwhile, the electrolytic catalysis performance of an electrode is further improved. In view of this, the present invention has been made. Disclosure of Invention The invention aims to provide an electrolyzed water anode plate net, a preparation method thereof and an electrolysis device, and aims to remarkably improve the electrolysis catalytic performance of an electrode. The invention is realized in the following way: In a first aspect, the invention provides a method for preparing an electrolytic water anode plate net, which comprises the steps of preheating a nickel plate net, and depositing electrolytic nickel powder on the surface of the nickel plate net by adopting a collision embedding method; The collision embedding is to accelerate electrolytic nickel powder by using high-pressure inert gas through a spray pipe, and the accelerated powder is embedded into the nickel plate net. In an alternative embodiment, the surface of the electrolytic nickel powder has protrusions smaller than 5 μm, and the electrolytic nickel powder is dendritic; preferably, the electrolytic nickel powder has a powder average size of 5 μm to 120 μm; preferably, the powder temperature is less than 100 ℃. In an alternative embodiment, the gas pressure of the high-pressure inert gas is 3MPa-10MPa, the gas temperature is less than 100 ℃, and the powder embedding speed is controlled to be 100m/s-500m/s; Preferably, the high pressure inert gas is unheated argon. In an alternative embodiment, the preheating is heating the nickel plate mesh to 500 ℃ or higher; Preferably, the preheating temperature is 500 ℃ to 600 ℃. In an alternative embodiment, a high-frequency electromagnetic induction heating system is used for preheating the nickel plate net, and the working frequency is controlled to be larger than 200Hz. In an alternative embodiment, the mesh number of the nickel plate mesh is 40 mesh to 60 mesh. In an alternative embodiment, the nickel plate mesh is pre-treated to a roughness of greater than 5 μm prior to depositing the electrolytic nickel powder. In an alternative embodiment, the pretreatment comprises the steps of carrying out sand blasting on the nickel plate net to ensure that the roughness meets the requirement, and then washing and drying; preferably, before the electrolytic nickel powder is deposited, the plate net tooling is protected; in a second aspect, the present invention provides an electrol