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Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane

An anode-supported and stabilized zirconia technology, which is applied in zirconia, solid electrolyte fuel cells, fuel cell components, etc., can solve the problems of shortening the electrolyte membrane preparation cycle, low film formation efficiency, time-consuming and labor-intensive problems, etc.

Inactive Publication Date: 2006-10-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to overcome the shortcomings of low film-forming efficiency, time-consuming and labor-intensive methods in the existing methods, and provides a simple and efficient method for preparing an anode-supported yttrium oxide-stabilized zirconia electrolyte membrane. The dense YSZ electrolyte film simplifies the cumbersome process flow of the existing technology, shortens the preparation cycle of the electrolyte film, and at the same time ensures that the fuel cell has an ideal output power density

Method used

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  • Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane
  • Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane
  • Method for preparing anode-support type yttrium oxide stable zirconium oxide electrolyte membrane

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specific Embodiment approach 1

[0007] Specific Embodiment 1: In this embodiment, the anode-supported yttria-stabilized zirconia electrolyte membrane is prepared in this way: (1), the porous anode support is prepared according to the traditional ceramic molding method; (2), YSZ is prepared on the surface of the anode support The electrolyte membrane, wherein the preparation of the electrolyte membrane on the surface of the anode support is carried out in the following steps: a, dissolving ethyl cellulose in terpineol to form ethyl cellulose terpineol with an ethyl cellulose content of 1 to 10% solution; b, after adding YSZ powder and antifoaming agent in ethylcellulose terpineol solution, grind more than 2h, obtain stable and uniform electrolyte slurry, wherein the weight ratio of YSZ and ethylcellulose terpineol solution is ( 1.5~4.0): 1, the amount of defoamer added is 0.1~10% of the total weight of the slurry; c, take the YSZ slurry prepared in step b, spread it evenly on the surface of the anode support, ...

specific Embodiment approach 2

[0008] Specific embodiment 2: This embodiment is to prepare anode-supported yttria-stabilized zirconia electrolyte membrane in this way: (1), prepare porous anode support body according to traditional ceramic molding method: YSZ, NiO and pore-forming agent are ground with The method is to mix it evenly, put it into a Φ13mm mold and press it into an anode diaphragm, put the diaphragm into a muffle furnace and sinter at 900-1400°C for 1-5 hours, remove the pore-forming agent, and form a porous anode support. After sintering, the pores of the anode The rate is 10-60%, wherein the weight ratio of NiO and YSZ is (1-4): 1; the pore-forming agent is starch or carbon powder, and its addition is 5-25% of the total weight of YSZ and NiO; Said that the average particle size of YSZ is 0.5-2.0 microns; (two), prepare YSZ electrolyte membrane on the surface of the anode support: a, fully dissolve ethylcellulose (ethylcellulose) in terpineol (terpineol) to form ethyl Terpineol solution of ce...

specific Embodiment approach 3

[0009] Specific embodiment three: In this embodiment, the anode-supported yttria-stabilized zirconia electrolyte membrane is prepared in this way:

[0010] 1. Preparation of porous anode support:

[0011] The porous anode support was prepared with commercial yttria-stabilized zirconia (YSZ) and self-made NiO by precipitation method (precipitation method), wherein YSZ contained yttrium oxide (Y 2 o 3 ) is incorporated in an amount (molar ratio) of 8%, and starch is added to the anode as a pore-forming agent. Take 2 grams of YSZ, 2 grams of NiO and 0.4 grams of starch, put them into an agate jar, add a large amount of absolute ethanol, and grind them with a planetary ball mill for 4-10 hours. After drying with an infrared lamp, take 0.2 grams and press them in a stainless steel mold with a pressure of 100-300 MPa. Form an anode sheet with a diameter of 13mm and a thickness of 0.4mm, sinter the anode sheet at 900-1400°C for 2 hours, remove the starch pore-forming agent, and obt...

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Abstract

The invention relates to a producing method of anode supporting yttrium oxide stable zirconium oxide electrolyte membrane. It relates to the producing method of electrolyte membrane used in solid oxygen compound fuel battery. It is produced following the steps: making multi-hole anode supporting; making YSZ electrolyte membrane on the surface of the supporting; forming ethyl cellulose terpilenol solution; adding YSZ powder into the solution and grinding for over two hours to form electrolyte stuff; spreading the stuff on the surface of supporting; sintering the dried anode supporting and the electrolyte membrane to gain anode supporting YSZ electrolyte membrane. The electrolyte membrane produced following the invention is equality and compact. Its thickness is between 10-30mucrometer. The cost of the device is low, and the operation is easy and fast. Meanwhile the ideal output power density of fuel cell is ensured.

Description

Technical field: [0001] The invention relates to a method for preparing an electrolyte membrane in a solid oxide fuel cell, in particular to a method for preparing an yttria-stabilized zirconia (YSZ) solid electrolyte membrane for a solid oxide fuel cell. Background technique: [0002] Solid Oxide Fuel Cells (SOFCs) is a device that can directly convert the chemical energy of fuel gas into electrical energy. It is a new technology developed rapidly in the 1980s. The SOFCs power generation process does not involve the conversion step of chemical energy to thermal energy, so the process is not limited by the Carnot cycle, which greatly improves the efficiency of the system. At the same time, a large amount of waste heat generated during battery operation can be used to realize combined heat and power, and the comprehensive utilization rate of energy can reach more than 80%. In addition, SOFCs also have many advantages such as strong fuel adaptability and environmental friendl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10H01M4/88C04B35/622C01G25/02H01M8/1226H01M8/1246
CPCY02E60/50
Inventor 张耀辉苏文辉黄喜强吕喆徐加焕葛晓东
Owner HARBIN INST OF TECH
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