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Solid electrolyte material and solid oxide fuel cell provided with same

A technology of solid electrolyte and solid oxide, which is applied in the direction of solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problems of inability to generate electricity and take out electricity, and achieve the effect of suppressing powdering 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）

[0037] 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), Sc 2 o 3 Raw material (average particle size 0.3μm), CeO 2 The raw material (average particle size 0.3 μm) becomes by the general formula 89mol% (ZrO 2 )-10mol%(Sc 2 o 3 )-1mol%(CeO 2 ) represents the composition of 10Sc1CeSZ, wet mixed in solvent ethanol for 50 hours, dried and pulverized, and then sintered at 1200°C. After pulverizing the sintered body into a powder, Al is added in an amount corresponding to 1 mol% relative to the total mass (total molar amount) of zirconia, scandium oxide, lanthanide oxide, and / or yttrium oxide in the solid electrolyte material. 2 o 3 (average particle diameter 0.5 μm), and 5 wt % of binder PVA was added to the aforementioned 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 h...

Embodiment 2

[0039] In the general formula 89mol% (ZrO 2 )-10mol% (Sc 2 o 3 )-1mol%(CeO 2 ) in the 10Sc1CeSZ composition, with respect to the total mass of zirconia, scandium oxide, lanthanide oxide and / or yttrium oxide in the solid electrolyte material (total molar mass), mixed with Al equivalent to 2mol% 2 o 3 , A dense solid electrolyte layer composed of 10Sc1CeSZ2A1 was obtained, except that it was the same as in Example 1.

Embodiment 3

[0041] In the general formula 87mol% (ZrO 2 )-10mol%(Sc 2 o 3 )-3mol%(CeO 2 ) in the composition of 10Sc3CeSZ, with respect to the total mass of zirconia, scandium oxide, lanthanide oxide and / or yttrium oxide in the solid electrolyte material (total molar mass), mixed with Al equivalent to 2mol% 2 o 3 , A dense solid electrolyte layer composed of 10Sc3CeSZ2A1 was obtained, except that it was the same as in Example 1.

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Abstract

Provided is a solid electrolyte material which, while maintaining high oxygen ion conductivity, minimizes the discomposition of scandia caused by impurities such as silicon in the fuel gas, and improves intergranular strength in order to eliminate intergranular fracture caused by crystalline modification. The solid electrolyte material is a zirconia solid electrolyte material having scandia and a lanthanoid oxide and / or yttria dissolved therein, and has alumina further added thereto.

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 scandium oxide is solid-dissolved 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 in flow contact with the oxygen e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02C04B35/48H01B1/06H01M8/12
CPCC04B35/486C04B35/488C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/327C04B2235/5436C04B2235/5445C04B2235/762C04B2235/765H01B1/08H01M8/1253H01M2008/1293H01M2300/0077Y02E60/50Y02P70/50
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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