Oxygen electrode slurry of solid oxide electrolytic cell, preparation method of oxygen electrode slurry and solid oxide electrolytic cell

A solid oxide and oxygen electrode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of not effectively reducing the initial internal resistance of SOEC, fast growth of oxygen electrode impedance, and reducing LSCF, etc., to achieve high initial electrolysis efficiency, The effect of increasing the number of three-phase boundaries and improving mixed conductivity

Active Publication Date: 2020-11-20
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the addition of GDC may also reduce the number of active sites on the surface of LSCF. At the normal operating temperature of the electrolytic cell (700-750°C), the composite method of LSCF-GDC cannot effectively reduce the initial internal resistance of SOEC.
[0007] In summary, the current SOEC based on LSCF-GDC composite oxygen electrode materials has the technical problems of large initial internal resistance and rapid growth of the impedance of the oxygen electrode.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oxygen electrode slurry of solid oxide electrolytic cell, preparation method of oxygen electrode slurry and solid oxide electrolytic cell
  • Oxygen electrode slurry of solid oxide electrolytic cell, preparation method of oxygen electrode slurry and solid oxide electrolytic cell
  • Oxygen electrode slurry of solid oxide electrolytic cell, preparation method of oxygen electrode slurry and solid oxide electrolytic cell

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0062] 3) Preparation of electrolyte layer: mix YSZ powder and organic binder according to the mass ratio of (1-2): 1, then ball mill for 1-3 hours to mix evenly, and apply to the surface of the hydrogen electrode functional layer with a thickness of 5-2 30μm, fully dried in the air; the particle size of YSZ powder is 60-100nm;

[0063] 4) Sintering of electrolyte and hydrogen electrode part: Sinter the hydrogen electrode support prepared in the above steps-hydrogen electrode functional layer-electrolyte layer at 1200-1600°C for 2-5 hours; after the hydrogen electrode support is sintered and reduced at high temperature The porosity is 25% to 55%, and the porosity of the hydrogen electrode functional layer after high temperature sintering and reduction is 20% to 50%;

[0064] 5) Preparation of SOEC oxygen electrode: use the oxygen electrode material powder as the carrier, load the metal oxide nanoparticles on the oxygen electrode material powder, so that the metal oxide nanopar...

Embodiment 1

[0072] The embodiment of the present application makes the first solid oxide electrolytic cell, and the preparation method is as follows:

[0073]1) First prepare the SOEC hydrogen electrode support body containing NiO and YSZ: mix the NiO and YSZ powder and the graphite pore-forming agent at a ratio of 1:1:0.2 for 10 hours, and put the mixed powder into the mold, and press it Forming to obtain a square sheet-shaped support with a side length of 7 cm and a thickness of 300 μm, and then pre-sintered at 1200 ° C for 2 hours to obtain a hydrogen electrode support, which serves as the support for the entire battery;

[0074] 2) Preparation of hydrogen electrode functional layer: uniformly mix NiO and YSZ powder at a ratio of 1:1, disperse uniformly in isopropanol by ultrasonic, spray on the surface of the support with a thickness of 8 μm, and fully bake in an air atmosphere at 150°C Dry, make the hydrogen electrode functional layer;

[0075] 3) Preparation of the electrolyte laye...

Embodiment 2

[0096] The embodiment of the present application is the electrochemical performance test and scanning electron microscope test of sample 1, sample 2, sample 3 and sample 4:

[0097]

[0098] 1. Measure the internal resistance of sample 1, sample 2 and sample 3, the results are as follows figure 1 shown. figure 1 The graphs of electrochemical impedance spectroscopy results for sample 1, sample 2 and sample 3 provided in the examples of the present application. The internal resistance of several samples was tested by electrochemical impedance spectroscopy (EIS), and the test conditions were 750 ° C, H 2 Humidification 66.6%, open circuit conditions. Such as figure 1 As shown, the impedance spectrum is mainly composed of two semicircles. The intersection of the left side of the semicircle and the real axis corresponds to the ohmic resistance of the electrolytic cell. The diameter of the semicircle in the high frequency area on the left corresponds to the activation polariza...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of solid oxide electrolytic cells, and particularly relates to oxygen electrode slurry of a solid oxide electrolytic cell, a preparation method of the oxygen electrode slurry and the solid oxide electrolytic cell. The invention provides a preparation method of oxygen electrode slurry of the solid oxide electrolytic cell, which comprises the following steps: step 1, loading metal oxide nanoparticles in an oxygen electrode powder material to prepare oxygen electrode powder; and 2, mixing the oxygen electrode powder, a second pore-forming agent and a binder to prepare the oxygen electrode slurry of the solid oxide electrolytic cell. The invention provides oxygen electrode slurry of the solid oxide electrolytic cell, a preparation method of the oxygen electrode slurry and the solid oxide electrolytic cell, and can effectively overcome the technical defects that the initial internal resistance of the existing SOEC is large and the impedance of anoxygen electrode is increased quickly.

Description

technical field [0001] The application belongs to the technical field of solid oxide electrolytic cells, and in particular relates to an oxygen electrode slurry for a solid oxide electrolytic cell, a preparation method thereof, and a solid oxide electrolytic cell. Background technique [0002] The solid oxide electrolytic cell (hereinafter referred to as SOEC) is a solid oxide fuel cell that operates in reverse, through the electrolysis of H by applied voltage and high temperature 2 O, producing H 2 and O 2 , to convert electrical and thermal energy into chemical energy. [0003] The oxygen electrode of SOEC is the place where oxygen is generated. It works under high temperature and strong oxidizing atmosphere. The oxygen electrode material should meet the following requirements: 1. High electronic conductivity and certain ionic conductivity; 2. Good oxygen evolution catalysis Activity; 3. Compatibility and thermal expansion coefficient matching with adjacent parts materi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04C25B9/00
CPCC25B1/04C25B9/00Y02E60/36
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap