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Composite material taking foam nickel as matrix and preparation method of composite material

A composite material, nickel foam technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of insufficient use of specific surface area, complicated operation, time-consuming and labor-intensive, etc. The effect of improving surface area and specific surface area

Active Publication Date: 2016-07-27
鲁焱工程技术咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned preparation process, the phenomenon of stacking and irreversible agglomeration of graphene occurs, so that the huge specific surface area of ​​graphene cannot be fully utilized; and adding an additional reducing agent during the reaction process increases the difficulty of experimental control and makes the operation It becomes complicated and increases the cost of the experiment; in addition, the size, dispersion and loading of the loaded metal nanoparticles cannot be effectively controlled, which is not conducive to its catalytic effect
The production process is demanding, the operation is complicated, and there are many types of raw materials required, which is time-consuming and labor-intensive, and greatly increases the cost of commercial production

Method used

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  • Composite material taking foam nickel as matrix and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Clean the nickel foam of 10mm*10mm*1mm with dilute hydrochloric acid, acetone and absolute ethanol for 13 minutes, then wash it with deionized water for 5 minutes and then dry it.

[0029] (2) Put 10 mg of graphene oxide prepared by the Hummers method in a beaker filled with distilled water, and sonicate in an ultrasonic instrument for 2 hours to obtain a concentration of 4 mg·ml -1 graphene oxide aqueous solution.

[0030] (3) Soak the nickel foam treated in step (1) directly into a graphene oxide aqueous solution beaker, and then sonicate and soak to form a nickel foam matrix material loaded with graphene oxide. During the ultrasonic immersion process, the reaction temperature is 30°C, the frequency is 40KHz, the ultrasonic is 20min, the interval is 5min, and the ultrasonic immersion is 20min, the total ultrasonic immersion time is 2 hours.

[0031] (4) Dry the prepared nickel foam substrate material loaded with graphene oxide, and then heat it up to 300°C at a r...

Embodiment 2

[0034] (1) Clean the nickel foam of 10mm*10mm*1mm with dilute hydrochloric acid, acetone and absolute ethanol for 12 minutes, then wash it with deionized water for 5 minutes and then dry it.

[0035] (2) Put 40mg of graphene oxide in a beaker filled with distilled water, and sonicate in an ultrasonic instrument for 2h to obtain a concentration of 3mg·ml -1 graphene oxide aqueous solution.

[0036] (3) Soak the nickel foam treated in step (1) directly into the graphene oxide aqueous solution beaker, and then ultrasonically soak to form a nickel foam matrix material loaded with graphene oxide. During the ultrasonic soaking process, the reaction temperature is controlled at 40 ℃, frequency 40KHz, ultrasonic 20min, interval of 5min, and then ultrasonic 20min, the total ultrasonic soaking time is 1 hour.

[0037] (4) The prepared nickel foam substrate material loaded with graphene oxide was dried, and then heated to 400°C at a heating rate of 5°C / min in a tube furnace under vacuum...

Embodiment 3

[0040](1) Put 5 mg of graphene oxide in a beaker filled with distilled water, and sonicate in an ultrasonic instrument for 2 hours to obtain a concentration of 6 mg·ml -1 graphene oxide aqueous solution.

[0041] (2) Soak 1cm*1cm*1mm nickel foam directly into a beaker of graphene oxide aqueous solution, and then ultrasonically soak to form a nickel foam matrix material loaded with graphene oxide. During the ultrasonic immersion process, the reaction temperature was controlled at 60°C, the frequency was 40KHz, the ultrasound was performed for 20 minutes, and the interval was 5 minutes, followed by another 20 minutes of ultrasound. The total ultrasonic immersion time was 3 hours.

[0042] (3) Dry the prepared nickel foam substrate material loaded with graphene oxide, then heat it up to 500°C in a tube furnace at a rate of 4°C / min under vacuum, take it out after holding for 2 hours, and obtain a three-dimensional Foamed nickel-graphene oxide composite product with porous structu...

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Abstract

The invention relates to a composite material taking foam nickel as a matrix and a preparation method of the composite material. The preparation method includes following steps: (1), preparing a graphene oxide water solution of 1.0-10.0 mg / mL; (2), soaking the foam nickel in the graphene oxide water solution, and performing ultrasonic treatment and material drying to obtain a foam nickel-graphene oxide composite product; (3), dissolving palladium acetylacetonate and potassium halide in N, N-dimethyl formamide, soaking the foam nickel-graphene oxide composite product in an N, N-dimethyl formamide solution for reaction for 1-6 h at 100-200 DEG C, cooling, separating, cleaning, and drying to obtain the composite material. By using the preparation method, the problems of stacking and irreversible aggregation of reduced graphene oxide are relieved effectively, size of palladium particles obtained by reduction reaches nanoscale, and the palladium particles are uniformly distributed on graphene, so that electrocatalytic activity of the palladium particles is improved fully.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional nanometer materials, is applied in the technical field of fuel cells, and relates to a composite material with nickel foam as a matrix and a preparation method thereof. Background technique [0002] Fuel cell is a green and efficient energy conversion device, which has very important application value in solving environmental and energy problems. The core problem in fuel cells is the relatively low cost and efficiency of catalysts. Reducing the cost of catalysts and improving the utilization of precious metals have become an important way for people to solve the problem of fuel cells and realize their commercial applications. The low efficiency of catalysts mainly comes from the activity and stability of noble metals. [0003] At present, the direct formic acid fuel cell (DFAFC) using formic acid as fuel has the advantages of convenient operation, simple system structure, liqui...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/96
CPCH01M4/9041H01M4/9083H01M4/96Y02E60/50
Inventor 冷金凤单光乐周懿涵滕新营赵德刚赵松方
Owner 鲁焱工程技术咨询有限公司
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