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Catalyst for solid oxide fuel cell cathode and preparation method of catalytic cathode

A fuel cell cathode and solid oxide technology, which is applied to solid electrolyte fuel cells, battery electrodes, circuits, etc., can solve the problems of fast degradation rate and high operating temperature, and achieve low degradation rate, uniform composition and thickness, and excellent electrochemical performance. performance effect

Active Publication Date: 2017-02-15
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a solid oxide fuel cell cathode catalyst and a preparation method of the catalytic cathode, which solves the problem of high operating temperature and fast degradation rate during the operation of the solid oxide fuel cell prepared by existing materials and prior art The problem

Method used

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  • Catalyst for solid oxide fuel cell cathode and preparation method of catalytic cathode
  • Catalyst for solid oxide fuel cell cathode and preparation method of catalytic cathode

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Embodiment 1

[0033] Embodiment 1 Catalyst Pr 1.99 Nd 0.01 Ni 1-x mn x o 4-δ (PNM) and the preparation of PNNM catalyzed LSCF cathode, wherein X=0.035

[0034] The preparation method is realized in the following steps:

[0035] 1) First, according to the chemical formula Pr of the impregnated substance 1.99 Nd 0.01 Ni 1-x mn x o 4-δ (PNM), configure the nitrate Pr(NO 3 ) 3 ·6H 2 O, Nd(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Mn(NO 3 ) 2 4H 2 The ethanol solution of O, wherein x is 0.035 in the chemical formula, according to metal atom (Pr+Nd+Ni+Mn): the substance ratio (molar ratio) of citric acid molecule is that 1: 1 ratio adds citric acid;

[0036] 2) At room temperature, the nitrate ethanol solution was stirred electromagnetically for 2 hours to completely dissolve and complex the nitrate to obtain a PNNM catalyst or be called a PNNM ethanol solution,

[0037] 3) Apply the LSCF slurry on the electrolyte by the screen printing method, put it in the sample incubator...

Embodiment 2

[0039] Embodiment 2 Catalyst Pr 1.99 Nd 0.01 Ni 1-x mn x o 4-δ (PNNM) and preparation of PNNM-catalyzed LSCF cathode, where X=0.065.

[0040] The preparation method is the same as Example 1, except that the chemical formula Pr is different from the example 1.99 Nd 0.01 Ni 1-x mn x o 4-δ X is 0.065, the configuration of nitrate matches this chemical formula, and the impregnation volume of PNNM in step 4) is 1.8 μL / mm 2 , other steps and parameters are the same as in Example 1.

Embodiment 3

[0041] Embodiment 3 Catalyst Pr 1.99 Nd 0.01 Ni 1-x mn x o 4-δ (PNNM) and preparation of PNNM-catalyzed LSCF cathode, where X=0.05.

[0042] The preparation method is the same as Example 1, except that the chemical formula Pr is different from Example 1 1.99 Nd 0.01 Ni 1-x mn x o 4-δ X is 0.05, the configuration of nitrate matches this chemical formula, and the impregnation volume of PNNM in step 4) is 1.8 μL / mm 2 , other steps and parameters are the same as in Example 1.

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Abstract

The invention discloses a catalyst for a solid oxide fuel cell cathode and a preparation method of the catalytic cathode. The catalyst is Pr1.99Nd0.01Ni1-xMnxO4-delta (PNNM). The catalyst is prepared through enabling Pr(NO3)3.6H2O, Nd(NO3)3.6H2O, Ni(NO3)2.6H2O and Mn(NO3)2.4H2O to perform a complex reaction with citric acid sufficiently in absolute ethyl alcohol, and then calcining ground black substances obtained from a complexing solution through heating, evaporating, burning and grinding for two hours at the temperature of 800 DEG C. A porous LSCF (La0.6Sr04Co0.2Fe0.8O3-delta) cathode is soaked by the complexing solution of the catalyst, so that the catalytic LSCF cathode with PNNM is obtained. The catalyst can be used for strengthening the oxygen reduction performance of the catalytic LSCF cathode, and the polarization resistance of the cathode is reduced.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a solid oxide fuel cell cathode catalyst and a method for preparing the catalyst cathode. Background technique [0002] Solid oxide fuel cell is one of the power generation technologies with the highest energy conversion efficiency and the most environmentally friendly so far, and it is also one of the new technologies for centralized or distributed power generation that is most likely to replace thermal power generation in the future. It has a strong role in the field of new energy conversion technology competitiveness. The operating temperature of early fuel cells was 800-1000°C. With the research of new materials, the structure of solid oxide fuel cells has changed from electrolyte support to anode support, and the operating temperature has dropped to 600-800°C, while the research operating temperature is 400 Low-temperature fuel cells at -600°C have become the ...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M4/90H01M4/88
CPCH01M4/88H01M4/9016H01M8/10Y02E60/50
Inventor 石永敬潘复生黄凯文吴英
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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