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BaSnO3 based multiphase 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: 2016-03-23
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • BaSnO3 based multiphase electrolyte material and preparation method thereof
  • BaSnO3 based multiphase electrolyte material and preparation method thereof
  • BaSnO3 based multiphase electrolyte material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] by 1gBaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighed 0.6921gBaCO 3 , 0.2643gSnO 2 , 0.1821gY 2 o 3 And 0.0114gZnO (analytically pure), add 100mL ethanol, utilize ZrO 2 The balls are ground balls, milled in a planetary ball mill at 400rpm for 10h, dried at 80°C, and then calcined in a muffle furnace at 1000°C for 3h to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. Press 9gCe 0.8 SM 0.2 o 2.9 Stoichiometric ratio weighed 18.1177gCe(NO 3 ) 3 ·6H 2 O and 4.6363gSm (NO 3 ) 3 ?6H 2 O, made into an aqueous solution with a metal cation molar concentration of 6mol / L, adding 10.0212g complexing agent citric acid (CA) [n(CA):n(metal cation)=1:1], adding 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, ultrasonically disperse for 30min, then ball mill at 400rpm for 3h, take it out, heat and stir to 80°C to form a transparent gel, dry at 100°C for 10h, and calcinate ...

Embodiment 2

[0032] by 3gBaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighs 2.0762gBaCO 3 , 0.7928gSnO 2 , 0.5464gY 2 o 3 And 0.0343gZnO (analytical pure), add 100mL ethanol, utilize ZrO 2 The balls are ground balls, milled in a planetary ball mill at 600 rpm for 8 hours, dried at 80°C, and then calcined in a muffle furnace at 1000°C for 3 hours to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. Press 7gCe 0.8 SM 0.2 o 2.9 The stoichiometric ratio weighs 14.0915gCe(NO 3 ) 3 ·6H 2 O and 3.606gSm(NO 3 ) 3 ?6H 2 O (analytically pure), made into an aqueous solution with a cation molar concentration of 5mol / L, adding 15.5885g of citric acid complexing agent (CA) [n(CA):n(metal cation)=2:1], adding 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 10min, then stir at 500rpm for 4h to mix the material evenly and break up the agglomeration of the powder, take it out and heat ...

Embodiment 3

[0035] By 5gBaSn 0.5 Y 0.46 Zn 0.04 o 2.73 Stoichiometric ratio weighed 3.4604gBaCO 3 , 1.3214gSnO 2 , 0.9107gY 2 o 3 And 0.0571gZnO (analytically pure), add 100mL ethanol, utilize ZrO 2 The balls are ground balls, milled in a planetary ball mill at 500rpm for 7h, dried at 80°C, and then calcined in a muffle furnace at 900°C for 3h to obtain pure BaSn 0.5 Y 0.46 Zn 0.04 o 2.95 Powder. Press 5gCe 0.8 SM 0.2 o 2.9 The stoichiometric ratio weighs 10.0654gCe(NO 3 )3 ·6H 2 O and 2.5757gSm(NO 3 ) 3 ?6H 2 O (analytically pure), made into an aqueous solution with a cation molar concentration of 3mol / L, adding 16.7020g complexing agent citric acid (CA) [n(CA):n(metal cation)=3:1], adding 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 10min, then ball mill at 400rpm for 4h to mix the material evenly and break up the powder agglomeration, take it out and heat and stir to 80°...

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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°C), 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, the conductivity of the solid electrolyte material should be increased so that it can reach 0.01~0.1Scm at 300~600℃ -1 , is one of t...

Claims

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Application Information

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Patent Type & Authority Applications(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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