Low-resistivity solid oxide fuel cell electrode and preparation method thereof

A fuel cell electrode and solid oxide technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor catalytic performance and high resistivity, achieve good dispersion, low resistivity, and prevent agglomeration

Inactive Publication Date: 2018-03-20
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a low-resistivity solid oxide fuel cell electrode and a preparation method thereof, aiming at solving the problem of poor catalytic performance and low resistivity of fuel cell electrodes in the prior art. high problem

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preparation example Construction

[0027] see figure 1 , figure 1 It is a flow chart of a preferred embodiment of a method for preparing a low-resistivity solid oxide fuel cell electrode of the present invention, as shown in the figure, which includes steps:

[0028] S10, Sr(NO 3 ) 2 , Y(NO 3 ) 3 •6H 2 O, Co(NO 3 ) 3 •6H 2 O and urea are added to the mixed solvent, and mixed evenly to obtain a modified material precursor solution;

[0029] S20. Adding the modified material precursor solution dropwise to the surface of the pre-prepared electrode porous layer, and drying in an oven under vacuum conditions;

[0030] S30, carry out 200-600 times to the electrode after drying treatment oC Calcination treatment to obtain low-resistivity solid oxide fuel cell electrodes.

[0031] Specifically, in the prior art, when modifying fuel cell electrodes with modification materials, it usually needs to go through 600 o The high-temperature calcination process above C, however, high-temperature calcination will ca...

Embodiment 1

[0049] by (GDC) as the electrode electrolyte layer, (LSCF) as electrode porous layer, Sr 0.9 Y 0.1 CoO 2.5+δ (SYC) as a finishing material, at 350 o The electrochemical impedance spectrum of the modified electrode obtained after calcination at C figure 2 Shown, where the impedance is represented by Z, and the impedance is a vector that varies with frequency, such as figure 2 As shown, the horizontal axis is the real part of the impedance, represented by Zˊ, and the vertical axis is the imaginary part of the impedance, represented by -Z".

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Abstract

The invention discloses a low-resistivity solid oxide fuel cell electrode and a preparation method thereof. The preparation method comprises the steps of adding Sr(NO3)2, Y(NO3)3.6H2O, Co(NO3)3.6H2O and urea into a mixed solution so as to prepare a modifying material, modifying a fuel cell electrode by virtue of the modifying material. The urea in the modifying material can be taken as a dispersing agent and can be taken as a decomposing fuel to assist phase formation in the combustion process, so that a high-temperature sintering process is avoided, the agglomeration of the modifying materialis prevented, and the solid oxide fuel cell electrode has the advantages of good dispersity, strong catalytic activity, relatively low resistivity and the like.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a low-resistivity solid oxide fuel cell electrode and a preparation method thereof. Background technique [0002] The existing technology’s strategies for improving the performance of battery electrodes mainly focus on the development of new materials and the nanometerization of electrode modification materials. In the process of preparing nanometerization of electrode modification materials, 600 o The high-temperature calcination step above C will have a relatively adverse effect on the dispersion of the electrode modification material and the stability of the nanostructure, resulting in poor catalytic performance and high resistivity of the battery electrode. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86
CPCH01M4/8605H01M4/8657Y02E60/50
Inventor 司凤占邵麟符显珠骆静利
Owner SHENZHEN UNIV
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