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High-temperature water electrolysis hydrogen production pool and method with element content and porosity changing in gradient mode

A gradient change, high-temperature electrolysis technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problems of high attenuation rate, inability to take into account stability and electrochemical performance, and achieve the effect of improving life and simple structure

Active Publication Date: 2022-08-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The attenuation rate of the proton conductor type high-temperature electrolytic water hydrogen production cell reported in the literature is relatively high, which cannot meet the requirements of its stability and electrochemical performance in a high-temperature and humid environment

Method used

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  • High-temperature water electrolysis hydrogen production pool and method with element content and porosity changing in gradient mode
  • High-temperature water electrolysis hydrogen production pool and method with element content and porosity changing in gradient mode
  • High-temperature water electrolysis hydrogen production pool and method with element content and porosity changing in gradient mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] The structure prepared by the process route of isostatic pressing-impregnation-high temperature co-firing-impregnation-sintering is NiO-BCZY (hydrogen electrode layer 1)-NiO-BCZY (active layer 2)-BCZY (inner electrolyte layer 31)-BZY (Outer electrolyte layer 32 )-LSC-BZY (air electrode layer 4 ) tubular high-temperature electrolytic water hydrogen production cell 10 .

[0069] Specifically, the hydrogen electrode layer 1 is prepared by isostatic pressing as a supporting tube blank, and the material of the hydrogen electrode layer 1 is NiO-BaCe 0.7 Zr 0.1 Y 0.2 O 3 (The mass ratio of the two is 3:2), and the thickness is 0.8mm. After calcining at 1100°C for the supporting tube blank of the hydrogen electrode layer 1, the active layer 2 is prepared on the outer surface of the hydrogen electrode layer 1 by a slurry dipping method. The material of the active layer 2 is NiO-BaCe 0.7 Zr 0.1 Y 0.2 O 3 (the mass ratio of the two is 1:1), and the thickness is about 20µm. ...

Embodiment 2

[0074] The structure prepared by the process route of isostatic pressing-impregnation-high temperature co-firing-impregnation-sintering is NiO-BCZI (hydrogen electrode layer 1)-NiO-BCZI (active layer 2)-BCZI (inner electrolyte layer 31)-BZI (Outer electrolyte layer 32 )-LSN-BZI (air electrode layer 4 ) tubular high-temperature electrolytic water hydrogen production cell 10 .

[0075] Specifically, the hydrogen electrode layer 1 is prepared by isostatic pressing as a supporting tube blank, and the material of the hydrogen electrode layer 1 is NiO-BaCe 0.5 Zr 0.3 In 0.2 O 3 (The mass ratio of the two is 3:2), and the thickness is 0.8mm. After calcining at 1100°C for the supporting tube blank of the hydrogen electrode layer 1, the active layer 2 is prepared on the outer surface of the hydrogen electrode layer 1 by a slurry dipping method. The material of the active layer 2 is NiO-BaCe 0.5 Zr 0.3 In 0.2 O 3 (the mass ratio of the two is 1:1), and the thickness is about 20µm...

Embodiment 3

[0078] The structure prepared by the process route of isostatic pressing-impregnation-high temperature co-firing-impregnation-sintering is NiO-BCZI (hydrogen electrode layer 1)-BCZI (inner electrolyte layer 31)-BZI (outer electrolyte layer 32)-LSC- BZY (air electrode layer 4 ) tubular high-temperature electrolyzed water hydrogen production cell 10 .

[0079]Specifically, the hydrogen electrode layer 1 is prepared by isostatic pressing as a supporting tube blank, and the material of the hydrogen electrode layer 1 is NiO-BaCe 0.5 Zr 0.3 In 0.2 O 3 (The mass ratio of the two is 3:2), and the thickness is 0.8mm. After the hydrogen electrode layer 1 supporting tube blank is calcined at 1100° C., an electrolyte layer 3 is prepared on the outer surface of the hydrogen electrode layer 1 to form a two-layer structure. BaCe 0.5 Zr 0.4 In 0.1 O 3 and BaCe 0.2 Zr 0.7 In 0.1 O 3 ) is prepared into a slurry and dipped in sequence on the outer surface of the above-mentioned hydro...

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Abstract

The invention discloses an element content and porosity gradient change high-temperature water electrolysis hydrogen production pool and method. The high-temperature water electrolysis hydrogen production pool is a reaction device for preparing hydrogen by electrolyzing water vapor through electric energy. The high-temperature electrolytic water hydrogen production pool is tubular and comprises a plurality of functional layers made of a material containing a proton conductor material, the proton conductor material is BaCe1-x-yZrxMyO3, x is more than or equal to 0 and less than or equal to 0.9, y is more than or equal to 0 and less than or equal to 0.2, x + y is more than or equal to 0 and less than or equal to 1, and M is Y, In, Yb, Sc, Cu and Zn; the plurality of functional layers comprise a hydrogen electrode layer, an electrolyte layer positioned on the outer side of the hydrogen electrode layer and an air electrode layer positioned on the outer side of the electrolyte layer; the Ce content of the plurality of functional layers decreases in a gradient manner from the hydrogen electrode layer to the air electrode layer; the electrolyte layer and the air electrode layer are of a porous structure, and the porosity is gradually increased from the electrolyte layer to the air electrode layer.

Description

technical field [0001] The invention belongs to the technical field of high-temperature electrolysis of water vapor for hydrogen production, and in particular relates to a high-temperature electrolysis water hydrogen production cell and method with gradient changes in element content and porosity. Background technique [0002] Energy and environmental issues are the bottlenecks restricting the sustainable development of our country and even the global economy. Due to its abundant resources, diverse sources, environmental protection, and storability, hydrogen can almost simultaneously meet the requirements of resources, environment and sustainable development, and become the future energy of mankind. With the diversification of the energy structure and the breakthrough of fuel cell technology, the market demand for hydrogen will increase significantly. An important problem that must be solved in the development of hydrogen energy is hydrogen production. Using excess power f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/015C25B9/23C25B11/04C25B11/031C25B13/07C25B1/042
CPCC25B1/04Y02P20/133Y02E60/36
Inventor 温兆银叶晓峰温亚兵
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI