Method for preparing high-performance fuel cell nanocomposite cathode material

A fuel cell, nanocomposite technology, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of reduced electrochemical performance, lack of ionic conductivity, etc., to improve cathode performance, raw materials Simple and easy to obtain, increase the effect of the area

Inactive Publication Date: 2019-03-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, LSM lacks ionic conductivity and its electrochemical performance degrades rapidly as the battery operating temperature decreases.

Method used

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  • Method for preparing high-performance fuel cell nanocomposite cathode material
  • Method for preparing high-performance fuel cell nanocomposite cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of material

[0025] (1) According to the molar ratio of citric acid to EDTA of 1.5:1, Er(NO 3 ) 3 ·6H 2 O, Bi(NO 3 ) 3 ·5H 2 The molar ratio of O and EDTA is 0.4:1.6:1.5, the ratio of 28% ammoniacal liquor volume and the molar number of EDTA 6ml:0.01mol, be dissolved in deionized water and keep stirring to obtain solution after making it fully dissolved;

[0026] (2) Stir the solution obtained in step (1) continuously at 375°C to completely evaporate the water, and then calcinate at 600°C for 3 hours to obtain the prepared ESB powder;

[0027] (3) According to the molar ratio of citric acid to EDTA of 1.5:1, La(NO 3 ) 3 ·6H 2 O and Sr(NO 3 ) 2 with Mn(NO 3 ) 2 The molar ratio to EDTA is 0.8:0.2:1:2, the ratio of the volume of 28% ammonia water to the molar number of EDTA is 6ml:0.01mol, dissolved in deionized water and stirred continuously to fully dissolve to obtain solution A, the pH value is 5.5;

[0028] (4) Stir the solu...

Embodiment 2

[0033] Embodiment 2: the preparation of material

[0034] (1) According to the molar ratio of citric acid to EDTA of 1.5:1, Er(NO 3 ) 3 ·6H 2 O, Bi(NO 3 ) 3 ·5H 2 The molar ratio of O and EDTA is 0.4:1.6:1.5, the ratio of 28% ammoniacal liquor volume and the molar number of EDTA 6ml:0.01mol, be dissolved in deionized water and keep stirring to obtain solution after making it fully dissolved;

[0035] (2) Stir the solution obtained in step (1) continuously at 375°C to completely evaporate the water, and then calcinate at 600°C for 3 hours to obtain the prepared ESB powder;

[0036] (3) Add citric acid, La(NO 3 ) 3 ·6H 2 O, Sr(NO 3 ) 2 , Mn(NO 3 ) 2 Dissolve in deionized water and stir continuously to make it fully dissolved to obtain a solution, wherein the molar ratio of metal ions to citric acid is 1:1.5, and the pH value is 3;

[0037] (4) Stir the solution A obtained in step (3) continuously at 200°C to evaporate part of the water to obtain colloid B;

[0038]...

Embodiment 3

[0040] Embodiment 3: the preparation of material

[0041] (1) According to the molar ratio of citric acid to EDTA of 1.5:1, Er(NO 3 ) 3 ·6H 2 O, Bi(NO 3 ) 3 ·5H 2 The molar ratio of O to EDTA is 0.396:1.584:2, the ratio of the volume of 28% ammonia water to the moles of EDTA is 6ml:0.01mol, dissolved in deionized water and continuously stirred to make it fully dissolved to obtain a solution, the pH value is 5.5;

[0042] (2) HfO 2 The powder is added to the solution obtained in step (1), HfO 2 The molar ratio of EDTA to EDTA is 0.01:2, and it is continuously stirred at 375°C to evaporate all the water, and then calcined at 600°C for 3 hours to obtain the prepared (Er 0.4 Bi 1.6 ) 0.99 f 0.01 o 3 Powder.

[0043] (3) According to the molar ratio of citric acid to EDTA of 1.5:1, La(NO 3 ) 3 ·6H 2 O, Sr(NO 3 ) 2 , Mn(NO 3 ) 2 The molar ratio to EDTA is 0.8:0.2:1:2, the ratio of the volume of 28% ammonia water to the molar number of EDTA is 6ml:0.01mol, dissolve...

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Abstract

The present invention discloses a method for preparing a high-performance fuel cell nanocomposite cathode material, and belongs to the technical field of fuel cell catalytic material preparation. Thefeed stocks comprise: doped bismuth oxide, a complexing agent, La(NO3)3.6H2O, Sr(NO3)2, Mn(NO3)2 and ammonium hydroxide. The molar ratio of La(NO3)3.6H2O, Sr(NO3)2, and Mn(NO3)2 is (0.4-0.9): (0.1-0.6): (0.8-1.2); and the complexing agent is a mixture of citric acid and EDTA. The high-performance fuel cell nanocomposite cathode is successfully obtained by modifying the doped bismuth oxide by usinga sol-gel method. The composite cathode particles obtained by using the method disclosed by the present invention can reach a nanometer size and can exhibit remarkable high catalytic activity; and the feed stocks in the present invention is simple and available, the process is stable, and the industrialized conditions are achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of fuel cell catalytic materials, and in particular relates to a preparation method of a high-performance fuel cell cathode material. Background technique [0002] Fuel cells are devices that directly convert chemical energy into electrical energy through electrochemical reactions, and are considered to be the preferred clean and efficient power generation technology in the 21st century. Among many types of fuel cells, solid oxide fuel cells (SOFC) have the highest power generation efficiency, and its fuel has wide applicability, and can use hydrogen, natural gas, methanol, ethanol, gasoline and other gases and liquids as fuel. The cathode is an important component of SOFC, and its performance is closely related to the catalytic activity, electrical conductivity and microstructure of the powder. An ideal high-performance cathode needs to have excellent electrochemical catalytic activity, have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9033H01M4/9091Y02E60/50
Inventor 陈孔发陈闽乐艾娜陈志逸江丽贞
Owner FUZHOU UNIV
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