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Proton conductor fuel cell cathode material with B-site defect, electrolyte and preparation method thereof

A fuel cell cathode and fuel cell technology, applied in the direction of fuel cells, battery electrodes, material separation, etc.

Active Publication Date: 2019-11-08
上海翌晶氢能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research focuses on the excellent proton conductivity of the BZCYYb electrolyte rather than the oxygen ion conductivity at high temperature, and there is no direct experimental evidence for its mixed conductivity

Method used

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  • Proton conductor fuel cell cathode material with B-site defect, electrolyte and preparation method thereof
  • Proton conductor fuel cell cathode material with B-site defect, electrolyte and preparation method thereof
  • Proton conductor fuel cell cathode material with B-site defect, electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment provides a medium and low temperature solid oxide fuel cell electrolyte material Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 0.95 o 3-δ The preparation method, concrete steps are as follows:

[0073] (1) Weigh 2.7441 g of barium nitrate, 0.4293 g of zirconium nitrate, 3.0395 g of cerium nitrate, 0.3830 g of yttrium nitrate and 0.4491 g of ytterbium nitrate, add a small amount of deionized water to dissolve. Weigh 30 g of ethylenediamine tetraacetic acid and 42 g of citric acid hydrate as a complexing agent and dissolve them in deionized water at a molar ratio of EDTA:citric acid hydrate:total metal ions of 1:2:1.

[0074] (2) After adding the solution containing complexing agent to the solution containing metal ions, add an appropriate amount of ammonia water dropwise to bring the pH of the solution to 7-8, and then stir under the condition of magnetic stirring to completely evaporate the water to obtain a gel substance.

[0075] (3) The gel-like substance wa...

Embodiment 2

[0078] This embodiment provides a medium and low temperature solid oxide fuel cell cathode powder Ba(Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 ) 0.95 o 3-δ The preparation method, concrete steps are as follows:

[0079] (1) Weigh 13.7204 g of barium nitrate, 5.8206 g of cobalt nitrate, 8.08 g of ferric nitrate, 2.1466 g of zirconium nitrate and 1.9151 g of yttrium nitrate, add a small amount of deionized water to dissolve. Weigh 30 g of ethylenediamine tetraacetic acid and 42 g of citric acid hydrate as a complexing agent and dissolve them in deionized water at a molar ratio of EDTA:citric acid hydrate:total metal ions of 1:2:1.

[0080] (2) After adding the solution containing complexing agent to the solution containing metal ions, add an appropriate amount of ammonia water dropwise to bring the pH of the solution to 7-8, and then stir under the condition of magnetic stirring to completely evaporate the water to obtain a gel substance.

[0081] (3) The gel-like substance was placed i...

Embodiment 3

[0084] This embodiment specifically provides a kind of Ba(Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 ) 0.95 o 3-δ The test for preparing symmetrical battery polarization impedance for the battery cathode includes the following specific steps:

[0085] (1) Weigh 1 g of the cathode powder Ba(Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 ) 0.95 o 3-δ , 10 ml of isopropanol, 2 ml of ethylene glycol, and 0.8 ml of glycerol were poured into a high-energy ball mill, and after ball milling at 400 r / min for 30 min, they were transferred to the strain bottle with a straw to obtain the desired cathode slurry.

[0086] (2) Place the prepared BZCYYb-0.95 electrolyte on a heating table to preheat at 200°C, use a spray gun to spray the prepared cathode slurry evenly on both sides of the electrolyte under the push of an inert gas, and wait for the liquid to evaporate completely Finally, the sprayed electrolyte was placed in a high-temperature muffle furnace and calcined at 900 °C for 2 h to prepare the desired symm...

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Abstract

The invention relates to a battery structure of a proton conductor fuel cell with a full B-site defect and a preparation method thereof. The constituent formula of the electrolyte material is Ba(Zr0.1Ce0.7Y0.1Yb0.1)xO3-delta(BZCYYb-x); and the constituent formula of the cathode material is Ba(Co0.4Fe0.4Zr0.1Y0.1)xO3-delta(BCFZY-x), wherein the x represents the defect amount of the B site element,0.9<=x<=1, and delta represents the oxygen vacancy content. The electrochemical performance of the fuel cell is improved by carrying out B-site ion defect on perovskite materials BaZr0.1Ce0.7Y0.1Yb0.1O3-delta and BaCo0.4Fe0.4Zr0.1Y0.1O3-delta; the Ba(Zr0.1Ce0.7Y0.1Yb0.1)xO3-delta material with the B-site defect is improved in sintering performance, oxygen permeability, proton conductivity and lowtemperature resistance; and the Ba(Co0.4Fe0.4Zr0.1Y0.1)xO3-delta material is improved in oxygen reduction reaction (ORR), area specific impedance and dual ion exchange capacity.

Description

technical field [0001] The present invention relates to a battery structure of a solid oxide fuel cell with all B-site defects and its preparation method and application, in particular to a solid oxide fuel cell electrolyte material Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) x o 3 and cathode material Ba(Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 ) x o 3-δ And its preparation method and application. Background technique [0002] Capable of efficiently generating electricity from a variety of fuels, solid oxide fuel cells are a promising technology to alleviate the growing global energy demand, characterized by high energy conversion efficiency, low emissions, and good fuel flexibility. The high operating temperature and activation energy of major oxygen-ion electrolytes such as yttrium-stabilized zirconia hinder the practical commercial application of solid oxide fuel cells because high temperature (>800 °C) usually implies high cost, expensive specialized materials, technical complexi...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M8/1253H01M8/126G01N30/02G01N30/06G01N31/10
CPCH01M4/9033H01M8/1253H01M8/126G01N31/10G01N30/02G01N30/06H01M2008/1293Y02E60/50
Inventor 杨广明何帆蒯旭郭磊周嵬邵宗平
Owner 上海翌晶氢能科技有限公司
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