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Electrolyte material of B-site doped proton conductor fuel cell, preparation method thereof, electrolyte material and application of electrolyte material in direct ammonia fuel cell

A fuel cell and doping technology, which is applied in the direction of fuel cells, battery electrodes, chemical instruments and methods, etc., can solve the problems of poor conductivity and poor electrolyte sintering, and achieve the effect of increasing service life and improving proton conductivity

Active Publication Date: 2021-07-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition to the anode issue, the poor apparent proton conductivity of the electrolyte at reduced temperatures is also an important challenge for PCFCs, which may be due to inherently low conductivity or poor sintering of the electrolyte.

Method used

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  • Electrolyte material of B-site doped proton conductor fuel cell, preparation method thereof, electrolyte material and application of electrolyte material in direct ammonia fuel cell
  • Electrolyte material of B-site doped proton conductor fuel cell, preparation method thereof, electrolyte material and application of electrolyte material in direct ammonia fuel cell
  • Electrolyte material of B-site doped proton conductor fuel cell, preparation method thereof, electrolyte material and application of electrolyte material in direct ammonia fuel cell

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preparation example Construction

[0045] The invention relates to a cell structure and a preparation method of a B-site doped proton conductor fuel cell. The electrolyte material has a molecular formula of Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 1-x PD x o 3-δ (BZCYYbPd), the cathode material composition molecular formula is BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 o 3-δ (BCFZY), the structure formula of solid oxide fuel cell anode is Ni-Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 1-x PD x o 3-δ (Ni-BZCYYbPd), where x represents the doping amount of Pd element, 0≤x≤0.1, and δ represents the content of oxygen vacancies, and belongs to the technical field of proton conductor fuel cell electrolyte and anode materials.

[0046] By perovskite material Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) x PD 1-x o 3-δ Incorporating a small amount of palladium into the B site can improve the sintering performance and proton conductivity of the fuel cell electrolyte, and improve the 2 and NH 3 electrochemical properties of the fuel. At 650 °C,...

Embodiment 1

[0049] This embodiment provides a medium and low temperature proton conductor fuel cell electrolyte material Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 0.95 PD 0.05 o 3-δ The preparation method, concrete steps are as follows:

[0050] (1) Weigh 13.067g of barium nitrate, 2.0393g of zirconium nitrate, 14.4378g of cerium nitrate, 1.8193g of yttrium nitrate, 2.1334g of ytterbium nitrate and 6.6615g of palladium nitrate, add a small amount of deionized water to dissolve. Weigh 29.224g of ethylenediaminetetraacetic acid and 42.028g of citric acid hydrate as a complexing agent and dissolve them in deionized water at a molar ratio of ethylenediaminetetraacetic acid: hydrated citric acid: total metal ions of 1:2:1.

[0051] (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 magnetic stirring to cause the water to evaporate completely ...

Embodiment 2

[0055] This embodiment provides a kind of middle and low temperature proton conductor fuel cell anode powder Ni-Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) x PD 1-x o 3-δ The preparation method, concrete steps are as follows:

[0056] (1) Weigh 7.0 g of nickel oxide, and weigh 3.0 g of the electrolyte powder and 1 g of soluble starch prepared in Example 1 at the same time, add an appropriate amount of ethanol as a solvent, pour it into a high-energy ball mill, and ball mill for 30 min at 400 r / min Finally, transfer it to a mortar with a straw, stir it by hand until the ethanol is completely volatilized, and then dry the anode powder.

[0057] sexual representation results

[0058] 1. Phase structure and microscopic morphology

[0059] figure 1 The a region is the XRD pattern of BZCYYb, BZCYYbPd and BZCYYbPd10 at room temperature. It can be seen from the figure that for the stoichiometric ratio of BZCYYb, all the diffraction peaks conform to the characteristic peaks of the orthorh...

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Abstract

The invention relates to an electrolyte material of a B-site doped proton conductor fuel cell, a preparation method thereof, and application of the electrolyte material in a direct ammonia fuel cell. The composition molecular formula of the cell anode material is Ni-Ba(Zr0.1Ce0.7Y0.1Yb0.1)1-xPdxO3-delta (Ni-BZCYYbPd), the composition molecular formula of the electrolyte material is Ba(Zr0.1Ce0.7Y0.1Yb0.1)1-xPdxO3-delta(BZCYYbPd), x represents the Pd element doping amount, x is equal to 0.05, and delta represents the oxygen vacancy content. By doping a certain content of palladium element in the electrolyte material Ba(Zr0.1Ce0.7Y0.1Yb0.1)1-xPdxO3-delta, the sintering performance and proton conductivity of the electrolyte are improved, and the ohmic impedance of the material is reduced. And meanwhile, the catalytic activity of the anode material to hydrogen and ammonia gas can be improved by doping Pd. Therefore, by doping Pd, the electrochemical properties of the electrolyte and the anode of the fuel cell are simultaneously improved, the practicability of the proton conductor fuel cell is improved, and the commercialization progress is promoted.

Description

technical field [0001] The invention relates to a cell structure doped with a proton conductor fuel cell electrolyte and a preparation method and application thereof, in particular to a proton conductor fuel cell electrolyte material Ba(Zr 0.1 Ce 0.7 Y 0.1 Yb 0.1 ) 1-x PD x o 3-δ And anode composite materials and their preparation methods and applications. Background technique [0002] The world today faces serious challenges of sustainable energy supply and maintaining healthy ecosystems. Considering the limited resources of fossil fuels and the negative impact of their combustion products on the environment, there is growing interest in finding alternative renewable energy supplies and improving energy efficiency. High-efficiency, low-emission solid oxide fuel cells (SOFCs), an energy storage device that converts chemical energy stored in fuels into electrical energy, are now receiving increasing attention. Meanwhile, hydrogen is a promising green energy source tha...

Claims

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Application Information

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IPC IPC(8): C01G55/00H01M4/90H01M8/1253H01M8/126
CPCC01G55/002H01M4/9033H01M8/1253H01M8/126C01P2002/72C01P2004/04Y02P70/50
Inventor 杨广明刘左清高沁宁何帆周嵬邵宗平
Owner NANJING UNIV OF TECH