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Hydro-thermal synthesis method for nanometer YSZ (Yttria-Stabilized Zirconia) serving as electrolyte material of solid oxide fuel cell

An electrolyte material and solid oxide technology, which is applied in the field of synthesis of nano-YSZ, an electrolyte material for solid oxide fuel cells, can solve the problems of unstable quality, many impurities, and large particle diameter.

Active Publication Date: 2012-05-09
汉高(烟台)新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problems of high-temperature roasting and secondary crushing and dispersion in the existing method, resulting in many impurities, large particle diameter and unstable quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 1. Formula

[0011] Dissolve 48g to 60g of yttrium chloride hydrochloride and 290g of zirconium oxychloride octahydrate in 3L of pure water, add 500g of urea and stir to dissolve, heat to above 70°C and keep it warm for 1h, place it to cool to room temperature, and age for 8h Above, filter with dense filter paper, and wash the precipitate with pure water until there is no chloride ion, add the precipitate to 1.2L-1.8L of pure water for beating, put the slurry into a high-temperature and high-pressure reactor with a volume of 3L, seal it and heat it to 350°C ~420℃, keep the pressure at 16mpa~22mpa, keep warm for 3h. After stopping heating and cooling to room temperature, move the finished product into a sand mill for grinding for 1 hour, then crush and disperse it with an ultrasonic crusher for 1 hour, and then use a high-speed centrifuge to separate it at 8000 ram to 10000 ram. The separated coarse ions can be re-sanded and ultrasonicated Broken and dispersed, the sepa...

Embodiment 2

[0014] Dissolve 480g ~ 600g of yttrium chloride hexahydrate and 2900g of zirconium oxychloride octahydrate in 30L of pure water, add 5000g of urea and stir to dissolve, heat to above 70°C and keep it warm for 1h, place it to cool to room temperature, and age for 8h Above, filter with dense filter paper, and wash the precipitate with pure water until there is no chloride ion, add the precipitate to 12L-18L of pure water for beating, put the slurry into a high-temperature and high-pressure reactor with a volume of 30L, seal it and heat it to 350°C-420°C ℃, keep the pressure at 16mpa-22mpa, and keep warm for 3h. After stopping heating and cooling to room temperature, move the finished product into a sand mill for grinding for 1 hour, then crush and disperse it with an ultrasonic crusher for 1 hour, and then use a high-speed centrifuge to separate it at 8000 ram to 10000 ram. The separated coarse ions can be re-sanded and ultrasonicated Broken and dispersed, the separated fine par...

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Abstract

The invention discloses a hydro-thermal synthesis method for nanometer YSZ (Yttria-Stabilized Zirconia, i.e. ZrO2 eutectic containing 8%-10% of Y2O3 in molar fraction) serving as an electrolyte material of a solid oxide fuel cell. The YSZ is a main raw material of the solid oxide fuel cell; and manufacturing the YSZ of high quality is an important approach to increase the performance of the solid oxide fuel cell. The hydro-thermal synthesis method comprises the following steps of: dissolving a certain proportion of zirconium oxychloride and yttrium chloride in water, co-precipitating the mixed liquor by using urea as a precipitating agent in the temperature of more than 70 DEG C, pulping filter cakes by using deionized water after ageing, filtering and washing, carrying out hydro-thermal synthesis on sizing agent under a high temperature and a high voltage to form nanometer crystal products, sanding and carrying out ultrasonication, high-speed centrifugal seperation and spray drying to prepare the nanometer YAZ with good eutectic effect and excellent performance.

Description

technical field [0001] The invention relates to the technical field of manufacturing fuel cell electrolyte materials, in particular to a solid oxide fuel cell electrolyte material nanometer YSZ (containing mole fraction 8% to 10% Y 2 o 3 ZrO 2 co-crystal) synthesis method. Background technique [0002] At present, my country is becoming the largest fuel cell market in the world. Although the solid oxide fuel cell (SOFC) started late, it is the most promising variety. It is called the third-generation fuel cell and has high efficiency (over 60%), can use a variety of combustible gases, less corrosion, simple power generation system, easy to scale up and other advantages. [0003] YSZ (containing 8% ~ 10% YrO 3 ZrO 3 Eutectic) is an important raw material for solid oxide fuel cells. There are existing preparation methods such as microemulsion method, alcohol monohydrate salt solution heating method, but the common disadvantage of these methods is that the post-processing s...

Claims

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Application Information

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IPC IPC(8): H01M8/10C04B35/626C04B35/48B82Y40/00H01M8/1016
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 司银奎
Owner 汉高(烟台)新材料股份有限公司
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