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Solid electrolyte material and solid oxide fuel cell provided with same

A solid electrolyte and solid oxide technology, used in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of inability to generate electricity and take out power, and achieve the effect of inhibiting pulverization and peeling.

Inactive Publication Date: 2013-12-25
TOTO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If pulverization and peeling occur, it becomes impossible to extract power, resulting in failure to generate electricity

Method used

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  • Solid electrolyte material and solid oxide fuel cell provided with same
  • Solid electrolyte material and solid oxide fuel cell provided with same
  • Solid electrolyte material and solid oxide fuel cell provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] due to production figure 2 type of single cell and experimented, so it will be described. Weigh as follows, so that ZrO 2 Raw material (average particle size 0.3μm), Y 2 o 3 Raw material (average particle size 0.3μm), CeO 2 Raw material (average particle diameter 0.3 μm) becomes by general formula 89.5mol% (ZrO 2 )-10mol%(Y 2 o 3 )-0.5mol% (CeO 2 ) represents the composition of 10Y0.5CeSZ, wet mixed in solvent ethanol for 50 hours, dried and pulverized, and then sintered at 1200°C. After pulverizing the sintered body into powder, 5 wt % of binder PVA was added to the powder and mixed in a mortar. The powder containing the aforementioned PVA was press-molded at 50 MPa, and sintered at 1450° C. for 5 hr. A dense solid electrolyte layer composed of 10Y0.5CeSZ was obtained. After grinding to a thickness of about 200 μm, use LSM (average particle size 2 μm) as the oxygen electrode layer to form a film by screen printing, so that the thickness after sintering is 20...

Embodiment 2

[0040] In the general formula 89.5mol% (ZrO 2 )-10mol%(Y 2 o 3 )-0.5mol% (CeO 2 ) in the powder composed of 10Y0.5CeSZ, together with the binder PVA, relative to the total mass of zirconia, yttrium oxide, and lanthanide oxides in the solid electrolyte material (total molar mass), mixing is equivalent to 1mol% Al 2 o 3 , and obtained a dense solid electrolyte layer composed of 10Y0.5CeSZ1Al, the same as Example 1 except that.

Embodiment 3

[0042] In the general formula 89.5mol% (ZrO 2 )-10mol%(Y 2 o 3 )-0.5mol% (CeO 2 ) in the 10Y0.5CeSZ composition represented by 1.5 mol% of Al is mixed with respect to the total mass (total molar amount) of zirconia, yttrium oxide, and lanthanide oxides in the solid electrolyte material 2 o 3 , and obtained a dense solid electrolyte layer composed of 10Y0.5CeSZ1.5Al, the same as Example 2 except that.

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Abstract

Provided is a solid electrolyte material provided which, while maintaining a high oxygen ion conductivity, minimizes the extraction of scandia caused by impurities such as silicon in the fuel gas, and has improved intergranular strength in order to eliminate intergranular fracture caused by crystalline modification. The solid electrolyte material is a zirconia solid electrolyte material having yttria dissolved therein, has cubic crystals as the main ingredient, and is further characterized by having a lanthanoid oxide dissolved therein.

Description

technical field [0001] The present invention relates to a solid electrolyte material and a solid oxide fuel cell provided with the solid electrolyte material. Background technique [0002] Conventionally, a solid electrolyte material such as zirconia in which yttrium oxide is solid-dissolved (hereinafter referred to as YSZ) has been used for applications such as solid oxide fuel cells (hereinafter abbreviated as SOFC). Compared with other fuel cells such as phosphoric acid type and molten carbonate type, SOFC has higher power generation efficiency and higher exhaust heat temperature, so it is attracting attention as a next-generation energy-saving power generation system. [0003] The basic composition of SOFC has a solid electrolyte layer, a fuel electrode layer and an oxygen electrode layer, hydrogen (H 2 ) and the like are in fluid contact with the fuel electrode layer on the side facing the solid electrolyte layer, and air or oxygen (O 2 ) and other oxidant gases are i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02C04B35/48C04B41/87H01B1/06H01M8/12
CPCH01B1/122H01M8/1253C04B35/486C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/5445H01M2300/0077Y02E60/50Y02P70/50H01M8/1016
Inventor 岛津惠美上野晃阿部俊哉宫尾元泰樋渡研一
Owner TOTO LTD
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