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Medium-low-temperature solid oxide fuel cell negative electrode material and preparation method thereof

A fuel cell cathode and solid oxide technology, which is applied in the direction of fuel cells, battery electrodes, chemical instruments and methods, etc., can solve problems such as structural instability, and achieve the effect of improving electrical conductivity and fine powder particles

Inactive Publication Date: 2018-08-14
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of unstable structure of the perovskite oxide cathode material of the solid oxide fuel cell in the prior art during operation, and to provide a medium and low temperature solid oxide fuel cell cathode material and its preparation method , the battery cathode material perovskite structure is stable and has good performance

Method used

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  • Medium-low-temperature solid oxide fuel cell negative electrode material and preparation method thereof
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  • Medium-low-temperature solid oxide fuel cell negative electrode material and preparation method thereof

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Embodiment 1

[0024] Low temperature solid oxide fuel cell cathode material Sr in embodiment 1 0.9 Y 0.1 CoO 3-δ Synthesis

[0025] 1. The cathode material has the general formula Sr 1-x R x CoO 3-δ Among them, when R is Y and when x=0.1, it is Sr 0.9 Y 0.1 CoO 3-δ , according to 0.05mol Sr 0.9 Y 0.1 CoO 3-δ Proportion, weigh 9.523g Sr(NO 3 ) 2 (analytical pure), 1.915gY (NO 3 ) 3 ·6H 2 O (analytically pure), 14.554g Co(NO 3 ) 2 ·6H 2 O (analytical pure);

[0026] 2. Slowly add the above-mentioned materials into a beaker filled with 200mL deionized water, dissolve them completely, stir evenly, add 58.446g EDTA (analytical pure) and 19.214g citric acid (analytical pure) into the mixed solution in turn and stir fully, Add NH dropwise to the mixed solution 3 ·H 2 O solution until the solution becomes transparent and the pH value is adjusted to 8, then add deionized water to 500mL;

[0027] 3. Put the above beaker containing the solution on a magnetic stirrer to heat and s...

Embodiment 2

[0031] Low temperature solid oxide fuel cell cathode material Sr in embodiment 2 0.8 Y 0.2 CoO 3-δ Synthesis

[0032] 1. The cathode material has the general formula Sr 1-x R x CoO 3-δ Among them, when R is Y and when x=0.2, it is Sr 0.8 Y 0.2 CoO 3-δ , according to 0.05mol Sr 0.8 Y 0.2 CoO 3-δ Proportioning, weigh 8.465g Sr(NO 3 ) 2 (analytical pure), 3.829gY (NO 3 ) 3 ·6H 2 O (analytically pure), 14.554g Co(NO 3 ) 2 ·6H 2 O (analytical pure);

[0033] 2. Slowly add the above-mentioned materials into a beaker filled with 200mL deionized water, dissolve them completely, stir evenly, add 58.446g EDTA (analytical pure) and 19.214g citric acid (analytical pure) into the mixed solution in turn and stir fully, Add NH dropwise to the mixed solution 3 ·H 2 O solution until the solution becomes transparent and the pH value is adjusted to 8, then add deionized water to 500mL;

[0034] 3. Put the above beaker containing the solution on a magnetic stirrer to heat an...

Embodiment 3

[0038] Low temperature solid oxide fuel cell cathode material Sr in embodiment 3 0.7 Y 0.3 CoO 3-δ Synthesis

[0039] 1. The cathode material has the general formula Sr 1-x R x CoO 3-δ Among them, when R is Y and when x=0.3, it is Sr 0.7 Y 0.3 CoO 3-δ , according to 0.05mol Sr 0.7 Y 0.3 CoO 3-δ Proportioning, weigh 7.407g Sr(NO 3 ) 2 (analytical pure), 5.738gY (NO 3 ) 3 ·6H 2 O (analytically pure), 14.554g Co(NO 3 ) 2 ·6H 2 O (analytical pure);

[0040] 2. Slowly add the above-mentioned materials into a beaker filled with 200mL deionized water, dissolve them completely, stir evenly, add 58.446g EDTA (analytical pure) and 19.214g citric acid (analytical pure) into the mixed solution in turn and stir fully, Add NH dropwise to the mixed solution 3 ·H 2 O solution until the solution becomes transparent and the pH value is adjusted to 8, then add deionized water to 500mL;

[0041] 3. Put the above beaker containing the solution on a magnetic stirrer to heat an...

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Abstract

The invention provides a medium-low-temperature solid oxide fuel cell negative electrode material. The negative electrode material has the general formula of Sr<1-x>R<x>CoO<3-delta>, wherein x is greater than or equal to 0.01 and less than or equal to 1.0, <delta> is greater than or equal to 0 and less than or equal to 0.5; and R is Pr, Y, Nd, Dy or Gd. The invention also provides a preparation method of the medium-low-temperature solid oxide fuel cell negative electrode material. By adopting a dual chelating agent sol-gel technology, the medium-low-temperature solid oxide fuel cell negative electrode material with uniform particles is prepared, so that the perovskite structure of SrCoO<3-delta> is stabilized, relatively high electrical conductivity is achieved in the air, high catalytic activity is shown within a range of 500-800 DEG C, high compatibility with electrolytes LSGM and SDC can be achieved, and high stability and electrochemical performance are shown within a medium-low-temperature temperature.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a medium-low temperature solid oxide fuel cell cathode material and a preparation method thereof. Background technique [0002] The excessive exploitation of fossil energy and the deteriorating environmental pollution have seriously restricted the sustainable development of social economy, and it is imperative to develop clean and efficient new energy. As a safe, clean and efficient new type of energy conversion device, solid oxide fuel cell has drawn more and more attention from people. Traditional solid oxide fuel cells usually operate at high temperatures (800-1000°C), resulting in poor stability, short life, and high operating costs. Reducing the operating temperature will help increase the selection range of battery materials and contact materials and reduce operating costs. Therefore, reducing the working temperature to the range of medium and low temperatur...

Claims

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Application Information

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IPC IPC(8): H01M4/90C01F17/00
CPCC01F17/32C01P2006/40H01M4/9033H01M2008/1293Y02E60/50
Inventor 蒋龙裴启明
Owner YANGTZE UNIVERSITY
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