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A kind of electric pulse preparation method of dissolution type perovskite

A technology of electric pulse and perovskite, which is applied in the direction of chemical instruments and methods, circuits, electrical components, etc., can solve the problems of damage to the matrix, low dissolution efficiency, etc., and achieve the effect of convenient operation, simple equipment, and prevention of power failure

Active Publication Date: 2019-03-15
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the more common dissolution methods mainly include acid etching, hydrogen high-temperature reduction, voltage application, etc. The dissolution formed by the above methods has defects such as damage to the matrix and low dissolution efficiency.

Method used

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  • A kind of electric pulse preparation method of dissolution type perovskite
  • A kind of electric pulse preparation method of dissolution type perovskite
  • A kind of electric pulse preparation method of dissolution type perovskite

Examples

Experimental program
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Embodiment 1

[0038] 1. Preparation of LSCN powder

[0039] 0.85mol La(NO 3 ) 3 ·6H 2 O, 0.15mol Sr(NO 3 ) 2 , 0.9mol Cr(NO 3 ) 3 9H 2 O and 0.1molNi(NO 3 ) 2 ·6H 2 O is dissolved in water to prepare a nitrate solution, mixed with 4 mol citric acid and 4.8 mol ethylene glycol complexing agent, and heated to form a gel state. After drying at 130°C for 3 hours, calcining at 800°C for 2 hours, and collecting the calcined powder to obtain LSCN powder (perovskite powder). The obtained powder XRD diffraction pattern is as follows image 3 shown;

[0040] 2. Powder electric pulse treatment

[0041] The perovskite-type oxide powder prepared in the electric pulse treatment step (1) using the electric pulse treatment device for stripping perovskite, as shown in Figure 1 and figure 2 As shown, the device includes:

[0042] The electric pulse generating device 1 is used to form a pulse current and regulate output current parameters. The electrical pulse generating device 1 includes: an...

Embodiment 2

[0049] 1. La 0.85 Sr 0.15 Cr 0.9 Ni 0.1 o 3 Powder preparation

[0050] Dissolve 0.85 mol of lanthanum nitrate, 0.15 mol of strontium nitrate, 0.9 mol of chromium nitrate and 0.1 mol of nickel nitrate in water to prepare a nitrate solution, mix 4 mol of citric acid and 4.8 mol of ethylene glycol complexing agent, and heat to form a gel state. After drying at 130°C for 3h, calcining at 800°C for 2h, and collecting the calcined powder, La 0.85 Sr 0.15 Cr 0.9 Ni 0.1 o 3 Powder;

[0051] 2. Powder electric pulse treatment

[0052] Adopt the electric pulse treatment device of the stripping type perovskite that embodiment 1 uses, the La prepared by electric pulse treatment step (1) 0.85 Sr 0.15 Cr 0.9 Ni 0.1 o 3 Powder, the method of use of the device is the same as in Example 1, and the electric pulse treatment parameters are as follows: pulse voltage 400V, pulse frequency 5Hz, pulse treatment time 300s, to obtain Ni-dissolved La 0.85 Sr 0.15 Cr 0.9 Ni 0.1 o 3 ...

Embodiment 3

[0054] Adopt the electric pulse treatment device of the stripping type perovskite used in embodiment 1, the electric pulse treatment is according to the LSCN powder prepared in embodiment 1 step (1), the use method of the device is the same as embodiment 1, and the electric pulse treatment parameters are as follows: pulse The voltage is 700V, the pulse frequency is 1Hz, and the pulse processing time is 30s, and the Ni-dissolved La 0.85 Sr 0.15 Cr 0.9 Ni 0.1 o 3 Powder; the XRD diffraction pattern of the powder with dissolution properties has a new diffraction peak at around 2θ=44.6°, and the phenomenon is obvious. Compared with the PDF card, it can be seen that this place corresponds to the (111) crystal plane of the Ni element, which can prove After the electric pulse treatment, the Ni element is dissolved from the inside of the perovskite powder, which can effectively improve the catalytic performance, coking resistance and carbon deposition resistance of the material.

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Abstract

The invention discloses an electric pulse preparation method for dissolved perovskite. The method comprises the following steps: preparing ABO3 perovskite type oxide powder by using a sol-gel method,putting the perovskite type oxide powder into a treatment ceramic casing, connecting two ends of the treatment ceramic casing with pulse electrodes, and performing electric pulse treatment on the ABO3perovskite type oxide powder prepared in the step (1), thereby obtaining a dissolved perovskite oxide, wherein the pulse voltage is 400-700V, the pulse frequency is 1-5Hz, and the pulse treatment time is 30-300 seconds. The method has the advantages that the method is simple, the dissolved perovskite can be prepared safely and efficiently, and the electrochemical properties of the dissolved perovskite as a solid oxide fuel battery anode material are improved.

Description

technical field [0001] The invention relates to an electric pulse preparation method of stripping perovskite. Background technique [0002] In recent years, solid oxide fuel cells have achieved great development due to their outstanding characteristics of all-solid-state structure, higher energy efficiency, and wide adaptability to various fuel gases such as coal gas, natural gas, and mixed gas. However, in order to achieve better electrochemical conversion performance, further optimization of battery materials, especially the performance optimization of anode materials, is required. [0003] Dissolution-type perovskites were found to have good catalytic and electrochemical properties, and solved the carbon deposition phenomenon of hydrocarbon fuels. Therefore, the preparation of perovskite materials with in-situ stripping properties can effectively solve the above-mentioned problems existing in current solid oxide fuel cell materials. [0004] Taking the dissolution type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/90
CPCY02E60/50
Inventor 齐锦刚张迪张伟乔思凡王冰赵作福
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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