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Hydrogen electrode of solid oxide electrolytic cell and preparation method thereof, solid oxide electrolytic cell

A solid oxide, electrolytic cell technology, applied in the direction of electrodes, electrolysis components, electrolysis process, etc., can solve the problems of reduced hydrogen electrode stability, reduced three-phase interface, poor uniformity and controllability, etc.

Active Publication Date: 2022-06-21
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the application discloses a hydrogen electrode for a solid oxide electrolytic cell and a preparation method thereof, which can effectively solve the poor uniformity and controllability of the pore structure and porosity of the existing Ni-YSZ porous cermet, making Nanoscale catalysts are easy to agglomerate under high temperature and long-term operation, resulting in the reduction of the three-phase interface and the technical problems of the stability of the hydrogen electrode.

Method used

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  • Hydrogen electrode of solid oxide electrolytic cell and preparation method thereof, solid oxide electrolytic cell
  • Hydrogen electrode of solid oxide electrolytic cell and preparation method thereof, solid oxide electrolytic cell
  • Hydrogen electrode of solid oxide electrolytic cell and preparation method thereof, solid oxide electrolytic cell

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preparation example Construction

[0051] The preparation method of the solid oxide electrolytic cell of the embodiment of the present application comprises the following steps:

[0052] 1) Preparation of SOEC hydrogen electrode supporter containing NiO and YSZ (yttria-stabilized zirconia): the NiO and YSZ powders are uniformly mixed with the first pore-forming agent by ball milling for 6 to 12 hours, and an appropriate amount of the mixed powder is put into the mold , warm press forming, the thickness is 100~1000μm, and then pre-sintered at 1000~1500℃ for 2h, the hydrogen electrode support body also serves as the support body of the whole battery;

[0053] 2) The hydrogen electrode of the solid oxide electrolytic cell of the present application is the hydrogen electrode functional layer, and its preparation method is: uniformly mix NiO, YSZ powder, the second pore-forming agent and solvent, and coat it on the hydrogen electrode support body. The surface, with a thickness of 5-25 μm, is fully dried in the air a...

Embodiment 1

[0066] The present embodiment provides a solid oxide electrolytic cell, and the specific steps are as follows:

[0067] 1) First prepare the SOEC hydrogen electrode supporter containing NiO and yttria-stabilized zirconia (hereinafter referred to as YSZ): the NiO and YSZ powders and the graphite pore-forming agent are uniformly mixed in a mass ratio of 1:1:0.2 by ball milling for 10h to obtain For the first mixture, take the mixed first mixture and put it into a mold, and then warm-press to form a square sheet-shaped support with a side length of 7 cm and a thickness of 300 μm. ; Wherein, the hydrogen electrode support is also used as the support of the entire solid oxide electrolytic cell;

[0068] 2) Preparation of hydrogen electrode functional layer: Mix NiO and YSZ powders, the mass ratio of NiO and YSZ powders is 2:1, the particle size of YSZ powders is 60-100nm, and then PS spherical pore formers and pore formers are added. The mass is 10% of the total mass of NiO and YS...

Embodiment 2

[0087] In this example, scanning electron microscopy and performance testing are performed on Sample 1, Sample 2 and Sample 3 prepared in Example 1 and Comparative Examples 1-2. Table 1 shows the structural characteristics of the hydrogen electrode functional layer of Sample 1, Sample 2 and Sample 3.

[0088] Table 1

[0089]

[0090]

[0091] 1. Scanning electron microscopy was performed on the sections of sample 1, sample 2 and sample 3, and the results were as follows Figures 1 to 4 shown, figure 1 The cross-sectional SEM picture of sample 3 provided in the embodiment of the present application; wherein, inside the frame is the hydrogen electrode functional layer area; figure 2 A cross-sectional SEM picture of sample 1 provided in the embodiment of the present application; wherein, the inside of the frame is the hydrogen electrode functional layer area; image 3 The cross-sectional SEM picture of sample 2 provided in the embodiment of the present application; whe...

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Abstract

The application belongs to the technical field of solid oxide electrolytic cells, and in particular relates to a hydrogen electrode of a solid oxide electrolytic cell, a preparation method thereof, and a solid oxide electrolytic cell. The preparation method of the present application includes the following steps: step 1, mixing NiO, yttria-stabilized zirconia, a second pore-forming agent and a solvent to obtain a second mixture, placing the second mixture on the surface of the hydrogen electrode support, and drying Pre-sintering after drying to obtain a pre-hydrogen electrode; wherein, the mass ratio of NiO to yttria-stabilized zirconia is (0.6 to 2.3): 1; step 2, the nanoparticles are arranged on the pre-hydrogen electrode, and then sintered to obtain Hydrogen electrode for solid oxide electrolysis cells. The application discloses a hydrogen electrode of a solid oxide electrolytic cell and a preparation method thereof, which can effectively solve the technical problem of poor uniformity and controllability of the pore structure and porosity of the existing Ni-YSZ porous cermet.

Description

technical field [0001] The application belongs to the technical field of solid oxide electrolytic cells, and in particular relates to a hydrogen electrode of a solid oxide electrolytic cell, a preparation method thereof, and a solid oxide electrolytic cell. Background technique [0002] Solid oxide electrolysis cell (hereinafter referred to as SOEC) is a solid oxide fuel cell operating in reverse. 2 O, produces H 2 and O 2 , converts electrical and thermal energy into chemical energy. [0003] Water vapor decomposition produces H 2 The reaction occurs on the hydrogen electrode, and the hydrogen electrode as a catalyst needs to speed up the reaction rate, reduce the overpotential, and at the same time provide a channel for electron and ion transport. Therefore, hydrogen electrode materials should meet the following requirements: stable in structure and composition under high temperature and high humidity conditions, and can work for a long time; good electronic conductivi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/042C25B11/031C25B11/091
CPCC25B1/04Y02E60/36
Inventor 胡帆杨波黄旭锐潘军徐钦张行何彬彬于丰源
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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