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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  • Application Information

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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 t

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

Examples

Experimental program
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Example Embodiment

[0027] Example 1

[0028] (1) Wash the 10mm*10mm*1mm foam nickel sequentially 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 10mg graphene oxide prepared by Hummers method in a beaker filled with distilled water, and sonicate for 2h in an ultrasonic instrument to obtain a concentration of 4mg·ml -1 The graphene oxide aqueous solution.

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

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

Example Embodiment

[0033] Example 2

[0034] (1) Wash the 10mm*10mm*1mm foam nickel sequentially 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, sonicate for 2h in an sonicator to obtain a concentration of 3mg·ml -1 The graphene oxide aqueous solution.

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

[0037] (4) Dry the prepared nickel foam matrix material loaded with graphene oxide, and then heat it up to 400°C at a heating rate of 5°C / min under vacuum in a tu...

Example Embodiment

[0039] Example 3

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

[0041] (2) Directly soak 1cm*1cm*1mm foamed nickel into a graphene oxide aqueous solution beaker, and then ultrasonically soak, and finally form a foamed nickel matrix material loaded with graphene oxide. During the ultrasonic soaking process, the reaction temperature is controlled to 60°C, the frequency is 40KHz, the ultrasonic is 20min, the interval is 5min, and the ultrasonic is 20min, the total ultrasonic soaking time is 3 hours.

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

[0043] (4) Dissol...

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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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