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Zirconium Oxide Sheet Used For Solid Oxide Type Fuel Cell And Solid Oxide Type Fuel Cell Monocell Comprising Same

A solid oxide and fuel cell technology, which is applied in the direction of solid electrolyte fuel cells, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of increased electrolyte sheet resistance and reduced battery power generation performance, so as to reduce cracking, Excellent power generation performance and excellent battery strength

Inactive Publication Date: 2015-05-27
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the electrolyte (sheet thickness) becomes thicker, there is a problem that the resistance in the thickness direction of the electrolyte sheet increases and the power generation performance of the battery decreases.

Method used

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  • Zirconium Oxide Sheet Used For Solid Oxide Type Fuel Cell And Solid Oxide Type Fuel Cell Monocell Comprising Same
  • Zirconium Oxide Sheet Used For Solid Oxide Type Fuel Cell And Solid Oxide Type Fuel Cell Monocell Comprising Same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0114] Examples are given below to further specifically illustrate the present invention. The present invention is not limited to the following examples, and can be implemented with appropriate changes within the scope of the above-mentioned and following purposes, and these are also included in the technical scope of the present invention.

[0115] 1. Evaluation method of raw material powder

[0116]

[0117] Using nitrogen as an adsorbed molecule, the specific surface area of ​​the powder was measured by the BET method. As a measurement device, Macsorb HM-1210 manufactured by Mountech Corporation was used. One sample was measured at three points, and the average value thereof was defined as the specific surface area.

[0118]

[0119] The aqueous solution which added 0.2 mass % of sodium metaphosphate as a dispersant to distilled water was used as a dispersion medium using laser diffraction / scattering type particle size distribution measuring apparatus "LA-920" manufac...

preparation example 1～4、7

[0124] Commercially available 8 mol% YSZ powder (manufactured by Daiichi Rare Elements Chemical Industry Co., Ltd. Name "HSY-8", specific surface area: 9m 2 / g, D50: 0.48μm) for heat treatment.

[0125] A wet medium circulating bead mill (manufactured by Ashizawa Finetech Co., Ltd.) dedicated to nanoparticle dispersion was used, and 4 kg of the above-mentioned heat-treated YSZ powder and 6 kg of pure water as a dispersion medium were charged thereinto as a raw material powder slurry. 4 kg of zirconia media (specific gravity: 6) having a diameter of 0.5 mm were thrown thereinto as grinding media. The power of the mill motor was adjusted, and the stirring power was 0.5kWh / kg-2kWh / kg, and the peripheral speed (ω) of the tip of the stirring blade was 8 m / s-10 m / s for pulverization. The slurry obtained by this wet pulverization was placed in a 10-liter rotary evaporator, and octanol equivalent to the slurry was added, and water was distilled off while heating and reducing pressur...

preparation example 5～6

[0127] 10Sc1CeSZ powder stabilized with commercially available 10 mol% scandium oxide and 1 mol% ceria at a temperature of 1250°C using a rotary furnace in which the core tube material is alumina Product name "10Sc1CeSZ", specific surface area: 11m 2 / g, D50: 0.6 μm, D90: 1.27 μm) were heat-treated, pulverized and dried in the same manner as in the above-mentioned Preparation Examples 1 to 4, and 7 to prepare a cubic-system stabilized ScCeSZ powder B1250. In addition, using a high-efficiency wet pulverizer (manufactured by Kotobuki Engineering & Manufacturing Co., Ltd., trade name: Apex Mill, model: AMV-1), the above-mentioned ScCeSZ powder without heat treatment was pulverized and dried in the same manner as above to prepare Cubic and stabilized ScCeSZ powder BNC. Table 1 shows the physical properties of these powders.

[0128] 【Table 1】

[0129]

[0130] 3. Fabrication of Zirconia Sheets

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Abstract

The present invention provides a zirconium oxide sheet used for a solid oxide type fuel cell and a solid oxide type fuel cell monocell comprising the same, aims to provide the zirconium oxide sheet which is suitable for being used as a solid oxide type fuel cell electrolyte sheet reducing the cracking along with a carrying operation and during the manufacture process of the zirconium oxide sheet and the manufacture process of using the zirconium oxide sheet as an electrolyte cell, even though the resistance of the zirconium oxide sheet is low. The present invention also aims to provide the solid oxide type fuel cell monocell comprising the zirconium oxide sheet as the electrolyte. The zirconium oxide sheet used for the solid oxide type fuel cell of the present invention is characterized by comprising an oxide of a zirconium oxide system, wherein the oxide of the zirconium oxide system takes the cubic zirconia as the main component, the thickness of the zirconium oxide sheet is between 50 micrometers and 120 micrometer, and the cracking maximum flexural amount in a four-point bending test is 10-30%. The solid oxide type fuel cell monocell of the present invention is characterized by comprising the zirconium oxide sheet as the electrolyte.

Description

technical field [0001] The present invention relates to an electrolyte sheet for a solid oxide fuel cell that suppresses the occurrence of breakage or cracking and has low electrical resistance, particularly a zirconia sheet suitable as a solid electrolyte membrane for an electrolyte-supported battery, and a solid oxide containing the sheet single cell for fuel cells. Background technique [0002] Conventionally, zirconia stabilized with diyttrium trioxide or the like as an oxygen ion conductor has been widely used as a solid electrolyte in a solid oxide fuel cell (hereinafter sometimes referred to as SOFC). In particular, in an electrolyte-supported battery, the strength of the battery needs to be maintained by the electrolyte itself. Therefore, a zirconia sheet mainly composed of tetragonal crystals is preferable as a solid electrolyte membrane from the viewpoint of strength characteristics. However, since the oxygen ion conductivity of tetragonal zirconia is lower than t...

Claims

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Application Information

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IPC IPC(8): H01M8/12C04B35/48C04B35/622
CPCY02E60/50Y02P70/50
Inventor 相川规一秦和男
Owner NIPPON SHOKUBAI CO LTD
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