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Solid oxide type fuel battery cell and method for fabricating solid oxide type fuel battery cell

By arranging a fuel electrode layer and an air electrode layer containing iron group elements and ceramics in the solid oxide fuel cell to control the oxidation expansion rate, the problem of electrolyte cracking and damage when the fuel cell is stopped is solved, and high temperature operation is achieved. Battery stability and safety under condition.

Inactive Publication Date: 2014-01-29
TOTO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, a bad phenomenon that the fuel pole deteriorates occurs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Use yttria-stabilized zirconia balls with a diameter of 5 mm to carry out 20 times on nickel oxide powder with an average particle size of 0.3 μm, yttria-stabilized zirconia (YSZ) powder with an average particle size of 0.25 μm, dispersant (ammonium polycarboxylate) and water. Hours of ball mill mixing to obtain a slurry liquid. At this time, the weight ratio of NiO and YSZ is 55:45 to 65:35. In addition, the average particle diameter of nickel oxide powder and YSZ powder was calculated by measuring the particle diameter of 100 particles at a magnification of 20000 times by SEM observation, and calculating the average.

[0098] The dispersed particle diameter of the obtained slurry liquid was measured by the method based on the 1st paragraph of page 12. The dispersed particle diameter of the slurry liquid was 1.0 μm.

[0099] (Production of composite materials for fuel electrodes)

[0100] The obtained slurry liquid was dried with a spray dryer to obtain a composite ...

Embodiment 2

[0108] A solid oxide fuel cell module was produced in the same manner as in Example 1, except that nickel oxide powder with an average particle diameter of 0.6 μm and yttria-stabilized zirconia (YSZ) powder with an average particle diameter of 2 μm were used.

[0109] The dispersed particle diameter of the obtained slurry liquid was 3.0 μm.

[0110] In addition, the particle size ratio of the nickel particles of the fuel electrode support to the average particle size of the YSZ particles was 3.30 times.

Embodiment 3

[0112] Except that PMMA with an average particle diameter of 3 μm was added as a porogen to the composite material for the fuel electrode, shearing was applied by an extruder to form primary particles and formed into a cylindrical shape, and the same method as in Example 1 was produced. Solid oxide fuel cell module. The ratio of the composite material for the fuel electrode and PMMA was a ratio of 72:28 Vol%.

[0113] The dispersed particle diameter of the obtained slurry liquid was 1.0 μm.

[0114] In addition, the particle size ratio of the nickel particles of the fuel electrode support to the average particle size of the YSZ particles was 1.30 times.

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PUM

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Abstract

Provided is a solid oxide type fuel battery cell comprising the following: a fuel gas channel, a fuel electrode layer provided around the fuel gas channel and including iron group elements and ceramic, a solid electrolyte layer provided around the fuel electrode layer, and an air electrode layer provided around the solid electrolyte layer. In the solid oxide type fuel battery cell, fuel gas is provided from one side of the fuel gas channel and discharged from an opening provided on the other side of the fuel gas channel, and when the temperature of the fuel battery cell is in a high temperature state close to the temperature of electricity generation and if oxidizing gas flows into the opening, an expansion rate suppression treatment is conducted to suppress the rate of oxidation expansion of the fuel electrode layer, thereby enabling the cracking of the electrolyte layer and the destruction of the cell to be prevented even if the flow of air into the fuel electrode side that accompanies cessation of fuel battery operation occurs.

Description

technical field [0001] The invention relates to a solid oxide fuel cell and a method for manufacturing the solid oxide fuel cell. Background technique [0002] A single solid oxide fuel cell is formed by sandwiching a solid electrolyte region between a fuel electrode and an air electrode. The fuel gas containing hydrogen flows to the fuel electrode side of the solid oxide fuel cell, and the air serving as an oxidant gas flows to the air electrode side to cause a power generation reaction. [0003] There are various shapes of solid oxide fuel cells. For example, there is known a solid oxide fuel cell in which a fuel gas flow path is provided inside the solid oxide fuel cell and air is flowed outside to cause a power generation reaction (for example, Japanese Patent Laid-Open 2006 -302709 Bulletin). In the solid oxide fuel cell as described above, there is known a configuration in which external air and fuel are mixed and burned at the outlet side opening of the fuel gas fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/12
CPCH01M8/1213Y02E60/521H01M8/04223H01M8/04753Y02E60/525H01M8/0432H01M8/243H01M2008/1293H01M8/04228H01M8/04225H01M4/8621H01M4/8652H01M4/8864H01M4/8885H01M8/004H01M4/9025Y02E60/50H01M8/0271H01M8/2428H01M8/2432H01M8/1231H01M4/8875H01M8/04089H01M8/1246H01M8/126
Owner TOTO LTD