Metallic oxide/carbon fiber composite material and preparation method and applications thereof

A composite material and carbon fiber technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc. Large and special shape carbon fibers are difficult to prepare and control, so as to achieve the effect of increasing catalytic activity and increasing current density

Inactive Publication Date: 2010-03-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, gel-sol method, blending method, solution immersion method, self-assembly method, etc. are commonly used to prepare carbon-based composite materials. And it is difficult to control the particle dispersion and particle size of metal oxides, which leads to the inability to realize the advantages of the synthesized composite materials
Moreover, the preparation and control of carbon fibers with special morphology are difficult, making them less widely used in the field of inorganic functional composite materials.

Method used

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  • Metallic oxide/carbon fiber composite material and preparation method and applications thereof
  • Metallic oxide/carbon fiber composite material and preparation method and applications thereof
  • Metallic oxide/carbon fiber composite material and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] With 80ml deionized water and a certain proportion of Ni(NO 3 ) 3 ·6H 2 O and Al(NO 3 ) 3 ·7H 2 O is prepared into a salt solution and then added appropriate urea to make a mixed solution, in which Ni 2+ The molar concentration of Al is 0.6mol / L, Al 3+ The molar concentration of urea is 0.3mol / L, and the molar concentration ratio of urea and all metal cations is 3.3. Put it into the liner of the polytetrafluoroethylene resin of 100ml, seal in the autoclave. Put it in an oven at 150°C for 24 hours for crystallization, and finally take out the liner. After the reaction was completed, it was suction filtered, washed twice with deionized water, and dried at 70° C. for 15 hours.

[0026] Spread 30 mg of the LDH precursor prepared above on a porcelain boat, and then put it into a horizontal quartz tube located in a tubular heating furnace, feed nitrogen gas with a flow rate of 60 ml / min, and raise the temperature to 700 °C at a rate of 5 °C / min. After 30min at ℃, ace...

Embodiment 2

[0030] With 80ml deionized water and a certain proportion of Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O is prepared into a salt solution and then added appropriate urea to make a mixed solution, in which Cu 2+ The molar concentration is 0.8mol / L, Mg 2+ The molar concentration of Fe is 0.4mol / L, Fe 3+ The molar concentration of urea is 0.4mol / L, and the molar concentration ratio of urea and all metal cations is 6. Put it into the liner of the polytetrafluoroethylene resin of 100ml, seal in the autoclave. Put it into an oven at 100°C for crystallization for 15 hours, and finally take out the liner. After the reaction was completed, it was suction filtered, washed twice with deionized water, and dried at 70° C. for 15 hours.

[0031] Spread 30 mg of the LDH precursor prepared above on a porcelain boat, and then put it into a horizontal quartz tube located in a tubular heating furnace, feed nitrogen gas with a flow rate of 70 ml / min, and raise the ...

Embodiment 3

[0035] With 80ml deionized water and a certain proportion of Ni(NO 3 ) 3 ·6H 2 O, Cu(NO 3 ) 2 ·6H 2 O, Mg(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 ·7H 2 O is prepared into a salt solution and then added appropriate urea to make a mixed solution, in which Ni 2+ The molar concentration is 0.4mol / L, Cu 2+ The molar concentration is 0.4mol / L, Mg 2+ The total molar concentration of Al is 0.4mol / L, Al 3+ The molar concentration of urea is 0.3mol / L, and the molar concentration ratio of urea and all metal cations is 5. Put it into the liner of the polytetrafluoroethylene resin of 100ml, put into the autoclave and seal. Put it into an oven at 120°C for crystallization for 20 hours, and finally take out the liner. After the reaction was completed, it was suction filtered, washed twice with deionized water, and dried at 70° C. for 15 hours.

[0036] Spread 50 mg of the LDH precursor prepared above on a porcelain boat, and then put it into a horizontal quartz tube located in a tubula...

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Abstract

The invention provides a metallic oxide / carbon fiber composite material and a preparation method and applications thereof, belonging to the technical field of composite material preparation. The metallic oxide / carbon fiber composite material is a composite material with composite metallic oxide uniformly loaded on the surface of the wall of a carbon fiber pipe, and in the composite material, the mass percentage content of the carbon fiber is 50-75 percent, and the specific surface area of carbon matrix composite material is 230-300m<2>g<-1>. The composite material is characterized by structural designability and adjustable and variable composition of a laminate according to layered bimetal hydroxide, and the ions of Ni<2+>, Cu<2+>, Mg<2+>, Al<3+> and Fe<3+> are introduced in the laminate to synthesize the metallic oxide / carbon fiber composite material with high hybridization of carbon fiber and metallic oxide. Carrier noble metal palladium or platinum on the composite material is madeinto electric catalyst used for a fuel cell, and the specific activity of the noble metal palladium or platinum directly in an alcohol fuel cell can reach 160-398mA.mg<-1>. The preparation method is simple, brings no environment pollution and is suitable for industrial process.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a metal oxide / carbon fiber composite material and a preparation method thereof, which are applied to direct alcohol fuel cells. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner. and power generation equipment. Fuel cells have a long history of development. Among them, the direct alcohol fuel cell is a new type of green energy technology that directly converts the chemical energy of liquid alcohol fuel into electrical energy without going through the Carnot cycle. In the selection of alcohols, various small organic molecules are used, such as methanol and ethanol. Methanol has been studied most extensively due to factors such as no C-C bond in its molecule, simple molecular structure, and high r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/10B01J32/00B01J23/755B01J23/745B01J21/18B01J23/89
CPCY02E60/50
Inventor 李峰张璐
Owner BEIJING UNIV OF CHEM TECH
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