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Method for preparing solid-oxide fuel battery cathode

A fuel cell cathode and solid oxide technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of low catalytic activity, and achieve the effects of high catalytic activity, multiple three-phase reaction interfaces, and excellent performance

Inactive Publication Date: 2008-10-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a solid oxide fuel cell cathode in order to solve the problem of low catalytic activity of the solid oxide fuel cell cathode prepared in the prior art under medium and low temperature conditions

Method used

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specific Embodiment approach 1

[0007] Specific embodiment one: the preparation method of the solid oxide fuel cell cathode in this embodiment is realized according to the following steps: 1. According to the chemical formula La 1-x Sr x MO 3 , La(NO 3 ) 3 , Sr(NO 3 ) 2 and M(NO 3 ) 2 The mixed solution, then add citric acid solution and stir evenly, the molar ratio of citric acid and metal ion substances in the mixed solution is 2:1, then add NH 3 ·H 2 0 to the pH of the solution = 6~7; 2. Put the solution in a constant temperature water bath at 60~80°C and stir until a sol is formed; 3. Pour the sol into the pores of the anodized aluminum template, and then place it at 700~ Calcining at 900°C for 1 to 3 hours, taking it out and then putting it into NaOH with a concentration of 6mol / L for 10 to 60 minutes to obtain the cathode of the solid oxide fuel cell; step 1 chemical formula La 1-x Sr x MO 3 where M is Mn, Fe or Co, 0<x≤0.5.

specific Embodiment approach 2

[0008] Embodiment 2: This embodiment differs from Embodiment 1 in that the total concentration of solutes in the mixed solution in Step 1 is 1.5-3 mol / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Embodiment 3: This embodiment differs from Embodiment 1 in that the total concentration of solutes in the mixed solution in step 1 is 2 mol / L. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

A preparation method for a solid oxide fuel cell cathode relates to a preparation method for a fuel cell cathode, which resolves problem in prior art that catalytic activity of a solid oxide fuel cell cathode is low under middle and low temperature. The preparation method includes: preparing sol from La1-xSrx(NO3)3M(NO3)2 and citric acid solution, filling the sol into a hole of an anode aluminum oxide template, calcining under high temperature, dipping into NaOH solution, and obtaining the solid oxide fuel cell cathode. Catalytic activity of the solid oxide fuel cell cathode of present invention is high under middle and low temperature.

Description

technical field [0001] The invention relates to a preparation method of a fuel cell cathode. Background technique [0002] The development of solid oxide fuel cell (SOFC) technology makes SOFC hopeful to become a new technology for centralized or decentralized power generation in the future, and has strong competitiveness in the new energy market. As the operating temperature of the battery decreases, the catalytic activity of the electrode will be greatly affected. In order to achieve the intermediate temperature of SOFC, improving the performance of the electrode, especially the cathode, becomes the key to solving the problem. [0003] Under medium and low temperature conditions, conventional micron-sized particle cathodes have small specific surface area, small three-phase reaction interface length, and few reactive sites, resulting in low catalytic activity. Contents of the invention [0004] The object of the present invention is to solve the problem of low catalytic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 张乃庆李娟孙克宁邵延斌
Owner HARBIN INST OF TECH
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