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Metal electrode plate suitable for electrolyzing water vapor by electrolyte membrane

A metal electrode and electrolyte membrane technology, applied in electrodes, electrode coatings, electrolytic components, etc., can solve the problems of full contact of reactants with difficult membrane electrodes, uneven internal potential distribution, easy occurrence of hot spots and dry spots, etc. Performance requirements, uniformity improvement, effect of improving uniformity

Pending Publication Date: 2022-06-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the area of ​​the fluid domain in these structures is not sufficient, it is difficult for the reactant (water vapor) to fully contact the membrane electrode, and the internal potential distribution is uneven, and problems such as hot spots and dry points are prone to occur.

Method used

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  • Metal electrode plate suitable for electrolyzing water vapor by electrolyte membrane
  • Metal electrode plate suitable for electrolyzing water vapor by electrolyte membrane
  • Metal electrode plate suitable for electrolyzing water vapor by electrolyte membrane

Examples

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Effect test

Embodiment 1

[0033] The present invention provides a metal electrode plate suitable for electrolysis of water vapor by an electrolyte membrane. The metal plate provides necessary reaction potential and mechanical properties for the electrolysis reaction, and the through hole provides a transmission channel for water (water vapor) to reach the surface of the catalytic layer, And to promote heat and mass transfer between the electrolyte membrane and water (water vapor), the metal electrode plate includes a metal plate 10 and a terminal 20, the terminal 20 is fixed on the metal plate 10; the metal plate 10 is provided with one or more The through hole 30 is used to form a fluid domain. The area of ​​the fluid domain formed by the through hole 30 is 54% of the area of ​​the metal plate. When opening a plurality of through holes, the through holes are evenly arranged on the metal plate or around the center point of the metal plate. Radiated distribution. The metal plate supports the through hol...

Embodiment 2

[0035] In order to optimize the system performance, the figure 2 and image 3 The new type of metal electrode plate structure, a through hole is opened in the center of the metal electrode plate to increase the fluid domain area of ​​the metal electrode plate. in the center of the electrode plate with image 3Taking the new electrode plate structure shown as an example, a square through hole is opened in the center of the metal electrode plate. Figure 4 The through-holes opened on the metal electrode plate are polygonal. Compared with the original metal electrode plate structure, the new metal electrode plate structure increases the area of ​​the fluid domain by 1 to 2.5 times, increases the air transport area for the reactant (water vapor) to reach the interface of the catalyst layer, and improves the heat transfer of the membrane electrode. Mass transfer improves system performance and improves the uniformity of temperature and humidity distribution inside the solid ele...

Embodiment 3

[0040] Since the new metal electrode plate structure makes the potential distribution inside the module uneven, further proposed such as Figure 4 and Figure 5 The shown metal electrode plate structure has a plurality of through holes radiating from the center point of the metal electrode plate. by Figure 5 Taking the metal electrode plate 2 suitable for the electrolysis of water vapor system as an example, the current density at the inner center and diagonal positions of the metal electrode plate is relatively low. Therefore, the metal electrode plate 2 of this embodiment retains the metal plate at the diagonal positions, and a plurality of through holes are arranged in an "X" shape on the metal electrode plate 2, which improves the potential distribution in the center and diagonal positions of the module. , the water electrolysis rate on the anode side is improved, and the system performance is optimized. The results are as follows:

[0041] It can be seen from Table 2 ...

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Abstract

The invention provides a metal electrode plate suitable for electrolyzing water vapor by an electrolyte membrane, which comprises a metal plate and a binding post, and the binding post is fixed on the metal plate; one or more through holes are formed in the metal plate to form a fluid domain, the area of the fluid domain formed by the through holes is not smaller than 54% of the area of the metal plate, and when the multiple through holes are formed, the multiple through holes are evenly formed in the metal plate or distributed around the center point of the metal plate in a radial mode. The metal plate provides necessary reaction potential and mechanical performance for electrolytic reaction, and the through holes provide transmission channels for water (water vapor) to reach the surface of the catalyst layer and promote heat and mass transfer between an electrolyte membrane and the water (water vapor). The metal electrode plate provided by the invention has better current density distribution, reaction potential and mechanical property, and enhances the water (vapor) transmission area to improve the electrochemical reaction rate, so that the internal temperature and humidity distribution of the membrane electrode is more uniform and stable.

Description

technical field [0001] The invention belongs to the field of electrolysis of water vapor, and in particular relates to a metal electrode plate suitable for electrolysis of water vapor by an electrolyte membrane. Background technique [0002] Solid electrolyte membrane electrolysis of water vapor for air dehumidification can realize portable, fast and intelligent humidity control, and has the potential for clean hydrogen production, which is very promising. However, the current low efficiency in the process of electrolysis of water vapor is the key to restricting the commercialization and industrialization of electrolyte membrane dehumidification. [0003] Metal electrode plates are electrically conductive, provide potential for electrolytic reactions, and are also used to seal and improve the mechanical properties of membrane electrodes. The planar structure of the electrode plate not only guides the current density distribution, but also provides a transport channel for th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/042C25B11/031C25B11/042C25B11/046B01D53/26
CPCC25B1/042C25B11/031C25B11/042C25B11/046B01D53/268B01D53/26Y02E60/36
Inventor 綦戎辉李贺勇黄丽娟张立志
Owner SOUTH CHINA UNIV OF TECH
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