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A kind of barium stannate-based composite electrolyte material and preparation method thereof

An electrolyte material, barium stannate technology, applied in the field of ceramic materials, can solve problems such as unsatisfactory electrical conductivity and difficult sintering

Inactive Publication Date: 2018-06-19
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material also has disadvantages such as difficult sintering and conductivity that cannot meet the requirements of medium and low temperature solid oxide fuel cell electrolytes.

Method used

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  • A kind of barium stannate-based composite electrolyte material and preparation method thereof
  • A kind of barium stannate-based composite electrolyte material and preparation method thereof
  • A kind of barium stannate-based composite electrolyte material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] By 1 g BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighed 0.6921 g BaCO 3 , 0.2643 g SnO 2 , 0.1821g Y 2 o 3 and 0.0114 g ZnO (analytically pure), add 100 mL ethanol, utilize ZrO 2 The balls were ground balls, milled in a planetary ball mill at 400 rpm for 10 h, dried at 80 °C, and then calcined in a muffle furnace at 1000 °C for 3 h to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. Press 9 g Ce 0.8 SM 0.2 o 2.9 Stoichiometric ratio weighed 18.1177g Ce(NO 3 ) 3 ·6H 2 O and 4.6363 g Sm(NO 3 ) 3 ·6H 2 O, be made into the aqueous solution that metal cation molar concentration is 6 mol / L, add 10.0212g complexing agent citric acid (CA) [n (CA): n (metal cation)=1:1], add NH 3 ﹒ h 2 O to adjust the pH of the mixed solution to 7. BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 The powder was added into the solution, ultrasonically dispersed for 30 min, then ball milled at 400 rpm for 3 h, taken out, heated and stirred to 80 °C to form a transparent gel...

Embodiment 2

[0032] By 3 g BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighed 2.0762 g BaCO 3 , 0.7928 g SnO 2 , 0.5464g Y 2 o 3 and 0.0343 g ZnO (analytically pure), add 100 mL ethanol, utilize ZrO 2 The balls were ground balls, which were milled in a planetary ball mill at 600 rpm for 8 h, dried at 80 °C, and then calcined in a muffle furnace at 1000 °C for 3 h to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. By 7 g Ce 0.8 SM 0.2 o 2.9 Weigh 14.0915 g Ce(NO 3 ) 3 ·6H 2 O and 3.606 g Sm(NO 3 ) 3 ·6H 2 O (analytically pure), made into an aqueous solution with a cation molar concentration of 5 mol / L, adding 15.5885 g of citric acid complexing agent (CA) [n(CA):n(metal cation)=2:1], adding dropwise NH 3 ﹒ h 2 O to adjust the pH of the mixed solution to 7. BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Add the powder into the solution, sonicate for 10 min, then stir at 500 rpm for 4 h to mix the mixture evenly and break up the agglomeration of the powder, take it o...

Embodiment 3

[0035] By 5 g BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighed 3.4604 g BaCO 3 , 1.3214 g SnO 2 , 0.9107 g Y 2 o 3 and 0.0571 g ZnO (analytically pure), add 100 mL ethanol, utilize ZrO 2The balls were ground balls, which were milled in a planetary ball mill at 500 rpm for 7 h, dried at 80 °C, and then calcined in a muffle furnace at 900 °C for 3 h to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. By 5 g Ce 0.8 SM 0.2 o 2.9 Weigh 10.0654 g Ce(NO 3 ) 3 ·6H 2 O and 2.5757 g Sm(NO 3 ) 3 ·6H 2 O (analytically pure), made into an aqueous solution with a cation molar concentration of 3 mol / L, adding 16.7020 g complexing agent citric acid (CA) [n(CA):n(metal cation)=3:1], adding dropwise NH 3 ﹒ h 2 O to adjust the pH of the mixed solution to 7. BaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Add the powder into the solution, sonicate for 10 min, then ball mill at 400 rpm for 4 h to mix the material evenly and break up the agglomeration of the powder, take i...

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Abstract

The invention discloses a BaSnO3 based multiphase electrolyte material and a preparation method thereof, belonging to the technical field of ceramic material. The preparation method comprises the following steps: carrying out Zn-Y codoping to obtain BaSn0.5Y0.46Zn0.04O2.73 which is easy to sinter and high in electric conductivity and chemical stability and is used as a substrate; and coating the surface of BaSn0.5Y0.46Zn0.04O2.73 uniformly with a second phase Ce0.8Sm0.2O2.9 through combination of a sol-gel method and ball milling, thus obtaining a nano multiphase material with a core-shell structure. According to the invention, based on the proton and oxygen iron rapid conduction principle of a two-phase interface, a proton-oxygen iron co-conduction BaSn0.5Y0.46Zn0.04O2.73 / Ce0.8Sm0.2O2.9 multiphase electrolyte material which is easy to sinter and high in electric conductivity and chemical stability is obtained.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a high-conductivity multi-phase electrolyte material and a preparation method thereof. Background technique [0002] Solid oxide fuel cells (SOFCs), as an all-solid-state high-efficiency, clean, and environmentally friendly energy conversion device, have attracted great attention for their broad application prospects, and are known as one of the most promising new energy technologies. However, there are still some major scientific and technical problems to be solved in solid oxide fuel cells, such as high operating temperature (800-1000 ℃), which increases the difficulty of material selection and manufacturing costs, and reduces the service life of fuel cells. Seriously restrict the commercial development of SOFCs. Therefore, to increase the conductivity of solid electrolyte materials to reach 0.01–0.1 S cm at 300–600 °C -1 , is one of the basic requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10H01M8/1016
CPCH01M8/10H01M8/1016Y02E60/50
Inventor 王延忠董英鸽张国祥刘炜常青胡胜亮杨金龙
Owner ZHONGBEI UNIV
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