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Preparation method of multihole anode support of solid oxide fuel cell

A solid oxide and fuel cell technology, applied in solid electrolyte fuel cells, fuel cell parts, battery electrodes, etc., can solve problems such as surface unevenness, achieve high dimensional accuracy, not easily deformed, and easy to operate

Inactive Publication Date: 2013-08-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the traditional hot die-casting method is generally used to manufacture dense alumina electronic ceramic devices, and the preparation of porous ceramics by this process, especially for the preparation of porous SOFC anode supports, has not been reported yet.
The preparation of porous anode supports by hot die casting will encounter the following problems: ①How to pretreat the original anode composite ceramic powder to make it evenly distributed so as to be suitable for the preparation of SOFC anode supports; ②How to obtain SOFC anode supports The required porous structure, including porosity, pore size and distribution, etc.; ③ what kind of adsorbent is suitable for the preparation of Ni-based SOFC anode; become uneven, how to deal with it to make the surface more uniform and smooth to be suitable for the preparation of electrolyte membrane

Method used

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  • Preparation method of multihole anode support of solid oxide fuel cell
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Experimental program
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Effect test

Embodiment 1

[0040] The preparation method of the porous anode support body of the solid oxide fuel cell of the present embodiment comprises the following steps:

[0041] (1) Ceramic powder pretreatment: pre-fire nickel oxide and 8mol% yttria-stabilized zirconia ceramic powder at 1200°C for 2 hours respectively; weigh the pre-fired nickel oxide and 8mol% yttrium oxide-stabilized zirconia ceramic powder, without adding pore-forming agent, is first subjected to wet ball milling: using absolute ethanol as a solvent, put it on a planetary ball mill for 3 hours, and then place it in a constant temperature oven at 80°C to fully Drying; then proceed with dry ball milling: put it into a ball mill jar for dry milling for 20 minutes, dry it and dry it in an oven to obtain a pretreated ceramic powder;

[0042] (2) Slurry preparation: Heat and stir the processed ceramic powder, sliced ​​paraffin, and stearic acid in a vacuum mixer for 12 hours at 75°C to form a uniformly flowing slurry; the weight of ...

Embodiment 2

[0052] The preparation method of the porous anode support body of the solid oxide fuel cell of the present embodiment comprises the following steps:

[0053] (1) Ceramic powder pretreatment: Ceramic powder pretreatment: pre-fire the nickel oxide and 8mol% yttria-stabilized zirconia ceramic powder at 900°C for 4 hours respectively; The final nickel oxide and 8mol% yttrium oxide stabilized zirconia ceramic powder, and add spherical graphite as a pore-forming agent, the weight of the spherical graphite is nickel oxide and 8mol% yttrium oxide stabilized zirconia ceramic powder gross weight 5%; first carry out wet ball milling: use absolute ethanol as a solvent, put it on a planetary ball mill for 4 hours, and then place it in a constant temperature oven at 90°C to fully dry; then continue to dry ball milling: put it in a ball mill jar to dry Grinding for 30 minutes, dry grinding and drying in an oven to obtain pretreated ceramic powder;

[0054] (2) Slurry preparation: Heat and s...

Embodiment 3

[0063] This embodiment tests the influence of forming agent on the fluidity of slurry:

[0064] Nickel oxide (NiO) and 8 mol% yttria-stabilized zirconia (YSZ) raw powder were pre-calcined at 1200°C for 2 h, weighed and added to a ball mill at a mass ratio of 3:2, and an appropriate amount of anhydrous Ethanol is used as a solvent, and it is placed on a planetary ball mill for ball milling for 4 hours, then placed in an 80°C constant temperature oven to fully dry, and then continue to be put into a ball mill jar for dry milling. After dry milling, it still needs to be placed in an oven for drying for subsequent use. According to the content of the surfactant being 5% of the weight of the molding agent, weigh 964.68g (NiO578.34g, YSZ386.34g) of the pretreated ceramic powder, and weigh different contents of the molding agent paraffin: 15% (170.24g ), 17% (197.59g), 20% (241.17g), surfactant stearic acid: 8.51g, 9.88g, 12.06g were put into a vacuum mixer and stirred at a low speed...

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Abstract

The invention discloses a preparation method of a multihole anode support of a solid oxide fuel cell. The preparation method comprises the following steps of: (1) pretreating ceramic powder, (2) preparing slurry, (3) conducting hot die-cast formation, (4) burying, burning, dewaxing and sintering, and (5) preparing an anode functional layer. The preparation method can be used for preparing the multihole anode support in a complicated shape, avoids the problem that uniformly mixed slurry of two powders is difficult to prepare, has the advantages of fast forming, easiness and simplicity in operation, low production cost and high labor productivity, and can realize mass production.

Description

technical field [0001] The invention relates to a preparation method of a solid oxide fuel cell, in particular to a preparation method of a porous anode support body of a solid oxide fuel cell. Background technique [0002] Solid Oxide Fuel Cell (SOFC) belongs to the third generation fuel cell and is a new type of all-solid-state chemical power generation device that directly converts the chemical energy of fuel into electrical energy. Among all kinds of fuel cells, SOFC has unique advantages: ① all-solid structure, no leakage of electrolyte, convenient for large-scale design and scale-up of structure; Wide range of applications; etc. Therefore, SOFC has broad application prospects in large, medium and small power stations, mobile and portable power sources, as well as military and aerospace fields. [0003] In various SOFC power generation devices, the single battery is the most basic element, and its structure and performance are directly related to the overall structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M4/88
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 肖杰刘江蔡位子
Owner SOUTH CHINA UNIV OF TECH
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