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Nitrogen ferride/carbide co-doped composite material used for increasing high oxygen reduction activation of fuel cell cathode

A fuel cell cathode and composite material technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex preparation process and difficult control of bonding degree.

Inactive Publication Date: 2016-05-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its preparation process is more complicated, and the degree of combination between the two is difficult to control

Method used

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  • Nitrogen ferride/carbide co-doped composite material used for increasing high oxygen reduction activation of fuel cell cathode
  • Nitrogen ferride/carbide co-doped composite material used for increasing high oxygen reduction activation of fuel cell cathode
  • Nitrogen ferride/carbide co-doped composite material used for increasing high oxygen reduction activation of fuel cell cathode

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Experimental program
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Embodiment 1

[0026] 0.6g of purchased 4,5-dicyanoimidazole was added to 10mL of N,N’-dimethylformamide solution and dissolved by ultrasonic for 10min, then 0.8g of ferrous acetate was weighed and slowly added to the above solution, and dissolved by ultrasonic for 30min. The mixed solution was added to a polytetrafluoroethylene lined autoclave. Move the autoclave to an oven and react at 120°C for 8 hours. After the reaction, the product was centrifuged and washed three times with water, and the product obtained was dried in a blast drying oven at 60°C for 8 hours. Finally at N 2 Calcining at 700℃, 800℃, 900℃ for 2h can get DCI-Fe-700, DCI-Fe-800, DCI-Fe-900.

[0027] Analysis and Characterization

[0028] Analysis and characterization The structure and phase of the sample were analyzed by the Dutch X'PertPROMPD X-ray diffractometer (XRD, CuKα, λ=0.15406nm), and the carbon of the sample was tested by the German STA409PC Luxx thermogravimetric analyzer (TGA) under air atmosphere. content. Obse...

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Abstract

The invention relates to an iron-nitrogen co-doped composite material used for increasing oxygen reduction activation of a fuel cell cathode; catalytic performance and stability of the material are increased by taking 4, 5-dicarbonitrile as a ligand by adding ferric salt. The iron-nitrogen co-doped composite material disclosed by the invention has the beneficial effects that the iron-nitrogen co-doped composite material (DCI-Fe-800) is prepared by adopting a single-step solvothermal method, and the composite material shows good electro-catalytic performance when being used for oxygen reduction reaction; electrochemical performance of the material is increased by regulating and controlling morphology of the material; through addition of 4, 5-dicarbonitrile, not only are a carbon source and a nitrogen source provided, but also nitrogen of different kinds are formed after high-temperature calcination, therefore very good catalytic action is exerted; a metal-nitrogen co-doped structure is formed by addition of the ferric salt, and through synergistic action between metal and nitrogen, oxygen reduction catalytic capacity of the material is further improved.

Description

Technical field [0001] The present invention relates to the preparation of composite materials, in particular to a composite material used for fuel cell cathodes and used for oxygen reduction tests. Background technique [0002] With the emergence of the energy crisis and the increasing environmental pollution problems, the search for alternative energy sources has become an urgent problem to be solved. Fuel cells have received great attention as a production device that can directly convert chemical energy into electrical energy without pollutant emissions. Fuel cells have great market application prospects due to their high energy conversion efficiency, fast load response, high operating quality and no pollution to the environment. Nowadays, the main technical obstacles and difficulties for the development and commercialization of fuel cells include low electrocatalytic activity of catalysts, slow rate of cathode oxygen reduction reaction, and low exchange current density. At...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/86
CPCH01M4/86H01M4/90Y02E60/50
Inventor 李忠涛孙洪迪魏良勤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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