High-performance solid oxide electrolytic tank support

A technology of solid oxides and supports, applied in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of Ni particle agglomeration, reduction of three-phase interface area, performance attenuation of solid oxide electrolytic cells, etc. , to achieve the effects of strengthening the gas diffusion conditions, simplifying the operation, and increasing the interface area of ​​the three-phase reaction

Active Publication Date: 2014-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor wettability of the Ni particles of the hydrogen electrode to the YSZ particles leads to the agglomeration of Ni particles during long-term operation, and the porosity of the support layer decreases, thereby reducing the area of ​​the three-phase interface and deteriorating the gas diffusion conditions, eventually resulting in solid Decay of Oxide Electrolytic Cell Performance

Method used

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  • High-performance solid oxide electrolytic tank support
  • High-performance solid oxide electrolytic tank support
  • High-performance solid oxide electrolytic tank support

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1) Dissolve 2% ammonium polyacrylate dispersant (DURAMAX D-3019) in water to form a dispersion, adjust the pH to 9, add 8YSZ (TZ-8YS produced by Tosoh, 25vol% of water) powder, After stirring and ultrasonication, 5% binder (DURAMAX B-1000) in water quality was added, and ball milled for 2 hours. The average particle size of the 8YSZ powder is 0.258μm, and the specific surface is 6.271m 2 / g.

[0032] 2) Pouring. Use 704 waterproof silica gel to fix the polypropylene resin mold on the metal freezing plate to make a pouring mold, and pour the water-based slurry in step 1) into the above-mentioned mold.

[0033] 3) Water oriented crystal growth. The low temperature and constant temperature stirring reaction bath (DHJF-8002 produced by Beijing Ruicheng Weiye Instrument Equipment Co., Ltd., the lowest temperature can reach -80°C) provides the cold source, and alcohol is used as the freezing medium, and the temperature is -60°C. Place the metal freezing plate in step 2, a...

Embodiment 2

[0038] 1) Dissolve 3% ammonium polyacrylate dispersant (DURAMAX D-3019) in water to form a dispersion, adjust the pH to 9, add 8YSZ (TZ-8YS produced by Tosoh, 30vol% based on water) powder body, stirred and ultrasonically added 5% binder (DURAMAX B-1000) in water quality, and ball milled for 2 hours. The average particle size of the 8YSZ powder is 0.258μm, and the specific surface is 6.271m 2 / g.

[0039] 2) Pouring. Use 704 waterproof silicone to fix the polypropylene resin mold on the metal freezing plate to make the pouring mold. Pour the water-based slurry in step 1 into the above mold.

[0040] 3) Water oriented crystal growth. The low temperature and constant temperature stirring reaction bath (DHJF-8002 produced by Beijing Ruicheng Weiye Instrument Equipment Co., Ltd., the lowest can reach -80°C) provides a cold source, and alcohol is used as a freezing medium, and the temperature is -40°C. Place the metal freezing plate in step 2, and freeze the slurry after 1 hour....

Embodiment 3

[0044] 1) Dissolve 3% ammonium polyacrylate dispersant (DURAMAX D-3019) in water to form a dispersion, adjust the pH to 9, add NiO-8YSZ (NiO and 8YSZ powder quality 55:45, alcohol wet Ball milled for 8 hours, dried to obtain; 30vol% based on water) powder, stirred and ultrasonically added with 5% water quality binder (DURAMAX B-1000), ball milled for 2 hours.

[0045] 2) Pouring. Use low temperature resistant waterproof silica gel (704 waterproof silica gel) to fix the polypropylene resin mold on the metal freezing plate to make the pouring mold. Pour the water-based slurry in step 1 into the above mold.

[0046] 3) Water oriented crystal growth. The low temperature and constant temperature stirring reaction bath (DHJF-8002 produced by Beijing Ruicheng Weiye Instrument Equipment Co., Ltd., the lowest can reach -80°C) provides a cold source, and alcohol is used as a freezing medium, and the temperature is -40°C. Place the metal freezing plate in step 2, and freeze the slurry...

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Abstract

The invention discloses a novel high-performance solid oxide electrolytic tank support which belongs to the technical field of a solid oxide electrolytic tank. The support is provided with a continuous gradient porous structure with the porosity of 60%-80%. A support preparation method comprises the following steps of: preparing water-based paste by using 8YSZ powder or NiO-8YSZ as a solid material and an ammonium polyacrylate dispersing agent and a water-based emulsion bonding agent, molding through the combination of a freezing pouring process and a freeze drying method, and finally sintering at high temperature to obtain the target support. As the support is provided with the continuous gradient porous structure, the area of the three-phase interface is greatly enlarged, meanwhile, the resistance of gas diffusing toward the surface of electrolyte from the surface of an electrode is reduced, and therefore, the polarization impedance of a solid oxide battery can be greatly reduced, thus the performance of the solid oxide battery is improved. The method has the advantages of simple operation, flexibility, controllable pore passage morphology and the like.

Description

technical field [0001] The invention belongs to the technical field of solid oxide electrolytic cells, in particular to a novel high-performance solid oxide electrolytic cell support body. Background technique [0002] Solid Oxide Fuel Cells (Solid Oxide Fuel Cells, SOFC) is a device that directly converts the chemical energy of fuel into electrical energy. SOFC operates in reverse and converts electrical energy into hydrogen or hydrocarbon fuels through electrochemical reactions at high temperatures. Chemical energy, called solid oxide electrolytic cells (Solid Oxide Electrolytic Cells, SOEC). Using a solid oxide electrolytic cell to electrolyze water vapor at high temperature can produce hydrogen with an efficiency as high as 45-59% (hydrogen production efficiency is defined as the ratio of the energy content of hydrogen produced to the total energy consumed for hydrogen production), which is considered It is one of the routes to replace fossil energy for large-scale hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622H01M8/12H01M8/02H01M8/1286
CPCY02E60/521Y02E60/525Y02E60/50
Inventor 王雪于波张文强徐景明陈靖
Owner TSINGHUA UNIV
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