Anode-electrolyte-cathode assembly of middly temp SOFC and preparation method thereof

A cathode component and electrolyte technology, applied in the direction of solid electrolyte fuel cells, electrical components, fuel cell parts, etc., can solve the problems of co-firing structure warping and deformation, difficult casting technology, and high requirements for powder raw materials, and achieve Effects of cost savings, avoidance of warpage and stress cracking, and high output performance

Inactive Publication Date: 2007-07-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

First of all, casting technology is difficult and requires high requirements for powder raw materials
Secondly, the composition of the anode green body and the electrolyte film is very different. To realize the co-firing of these two heterogeneous materials, the sintering shrinkage rate and thermal expansion coefficient must be carefully adjusted. will lead to stress cracking and complete failure of cofiring

Method used

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  • Anode-electrolyte-cathode assembly of middly temp SOFC and preparation method thereof
  • Anode-electrolyte-cathode assembly of middly temp SOFC and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of embodiment 1, GYDC

[0032] 1. Preparation conforms to Ce 0.8 Gd 0.05 Y 0.15 o 1.9 Stoichiometric ratio of gadolinium, yttrium composite doped ceria electrolyte

[0033] According to the stoichiometric ratio of cerium, gadolinium and yttrium ions in the molar ratio of 0.8:0.05:0.15, weigh cerium nitrate, gadolinium nitrate and yttrium nitrate, dissolve them in deionized water, stir continuously to dissolve them fully, form a clear solution and add Glycine, so that the molar ratio of glycine and nitrate ions is 0.2:1, adjust the pH value of the solution to 7.5 with ammonia water, then heat and evaporate at 80°C to remove water until a tan viscous gel is formed, and the water in the gel is evaporated to dryness Finally, move it to a constant temperature electric furnace at 200°C. The dry gel begins to expand, boil, and smoke in about 3 minutes, and then generates a flame and discharges a large amount of gas. After the reaction is completed, a light ...

Embodiment 2

[0046] Example 2, Preparation of an anode-electrolyte-cathode assembly of a medium temperature solid oxide fuel cell

[0047] 1. Preparation of GYDC-based anode-electrolyte bilayer structure

[0048] (1) Preparation of electrolyte thin film green body

[0049] First prepare the GYDC slurry. Be the Ce prepared in Example 1 with a grain size of 40-60nm 0.8 Gd 0.05 Y 0.15 o 1.9 Powder is used as raw material, ethanol and methyl ethyl ketone are added as organic solvent, dibutyl phthalate is added as plasticizer, castor oil is added as dispersant, polyvinyl butyral is added as binder, and ball milling is carried out Mix to obtain a homogeneous slurry. Among them, the amount of ethanol added is Ce 0.8 Gd 0.05 Y 0.15 o 1.9 70% of the powder mass, the amount of methyl ethyl ketone added is Ce 0.8 Gd 0.05 Y 0.15 o 1.9 47% of the powder mass, the amount of plasticizer added is Ce 0.8 Gd 0.05 Y 0.15 o 1.9 1% of powder mass, the amount of dispersant added is Ce 0.8 Gd ...

Embodiment 3

[0057] Example 3, Preparation of an anode-electrolyte-cathode assembly of a medium temperature solid oxide fuel cell

[0058] 1. Preparation of GYDC-based anode-electrolyte bilayer structure

[0059] (1) Preparation of electrolyte thin film green body

[0060] First prepare the GYDC slurry. Be the Ce prepared in Example 1 with a particle diameter of 30-50nm 0.8 Gd 0.1 Y 0.1 o 1.9 Powder is used as raw material, ethanol and methyl ethyl ketone are added as organic solvent, polyethylene glycol is added as plasticizer, fish oil is added as dispersant, polyvinyl butyral is added as binder, and ball milling is performed to obtain a uniform slurry . Among them, the amount of ethanol added is Ce 0.8 Gd 0.1 Y 0.1 o 1.9 70% of the powder mass, the amount of butanone added is Ce 0.8 Gd 0.1 Y 0.1 o 1.9 82% of the powder mass, the amount of plasticizer added is Ce 0.8 Gd 0.1 Y 0.1 o 1.9 5% of powder mass, the amount of dispersant added is Ce 0.8 Gd 0.1 Y 0.1 o 1.9 1%...

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Abstract

The invention discloses a medium temperature solid oxide fuel cell anode-electrolyte-cathode components and its method preparation, which is made from the anode that is made of NiO and GYDC made, cathode that is made of LSFC and GYDC, and electrolyte that is made of GYDC. GYDC is the composite oxide of cerium, gadolinium and yttrium according to the chemical ratio of Ce1-xGdx -yYyO2-0.5x and 0.1<=x<=0.2, 0 H01M 8/02 H01M 4/86 H01M 4/88 H01M 8/10 2 15 1 2006/12/22 101000965 2007/7/18 100449834 2009/1/7 2009/1/7 2009/1/7 Tsinghua Univ. Beijing 100084 Zhou Heping Guang Xiangfeng Liu Zhihui Wang Yanan Zhang Jun guanchang renfeng hua 11245

Description

technical field [0001] The invention relates to an anode-electrolyte-cathode assembly of a medium-temperature solid oxide fuel cell in the field of solid oxide cells and a preparation method thereof. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) is an efficient and environmentally friendly power generation device, which uses electrochemical reactions to directly convert the chemical energy stored in the fuel into electrical energy. In addition to the characteristics that energy conversion is not limited by the Carnot cycle and high energy utilization rate, it also has many advantages: it adopts an all-solid-state battery structure, and there is no problem of electrolyte corrosion or loss; it usually works at a high temperature of 500-1000 ° C, and the electrode reaction Quite quickly, no need to use noble metal electrodes (such as Pt); internal reforming of fuel can be realized, fuel adaptability is very wide, hydrogen, natural gas, water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/10H01M8/1004
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 周和平关翔锋刘志辉王亚楠张郡
Owner TSINGHUA UNIV
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