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Multi-component active metal/graphene composite hydrogen storage material and preparation method thereof

A graphene composite and active metal technology, which is applied in fuel cells, electrical components, electrochemical generators, etc., can solve the problems of small specific surface area of ​​graphene and limitation of graphene hydrogen storage capacity, so as to improve hydrogen storage capacity and cost Low, the effect of improving the process

Active Publication Date: 2019-03-12
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In recent years, the research on the hydrogen storage performance of graphene has attracted a large number of scientific researchers. The hydrogen storage capacity of graphene has been proved from two perspectives, theoretical calculation and experimental exploration. The specific surface area is much smaller than the theoretical specific surface area, so the hydrogen storage capacity of graphene itself is limited, which is much lower than the theoretical calculation value

Method used

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  • Multi-component active metal/graphene composite hydrogen storage material and preparation method thereof
  • Multi-component active metal/graphene composite hydrogen storage material and preparation method thereof
  • Multi-component active metal/graphene composite hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0027] (1) Preparation process of materials:

[0028] Step 1: Take 24mg of graphene oxide in a beaker, add 15mL of deionized water and sonicate for 18min to obtain a uniform light yellow-brown suspension, then place it in a water bath at 40°C for magnetic stirring, let it stand for 20h for ion exchange, and then take 600mg CaCl 2 ·6H 2 O and 60mgKOH were added to the solution and reacted for 30min in a nitrogen atmosphere.

[0029] Step 2: Add 240mg of Ru and Fe nanoparticles to the above solution, adjust the pH of the solution to 11 and react for 5h to obtain graphene oxide loaded Ca(OH) 2 , Ru and Fe suspensions, and then transfer the suspension to a polytetrafluoroethylene-lined reaction kettle to seal, put it in a drying oven at 170°C for 16h, filter the reaction product several times, wash and dry it at 240°C Calcined for 10 h to obtain graphene-supported Ru 2 o 3 , Fe 2 o 3 and CaO;

[0030] Step 3: Graphene supported Ru 2 o 3 , Fe 2 o 3 and CaO in Ar and H ...

Embodiment 2

[0034] (1) Preparation process of materials:

[0035]Step 1: Take 15 mg of graphene oxide in a beaker, add 30 mL of deionized water and sonicate for 5 minutes to obtain a uniform light yellow-brown suspension, then place it in a water bath at 30°C for magnetic stirring, and let it stand for 24 hours for ion exchange. 300mg MgSO 4 ·7H 2 O and 75mgKOH were added to the solution and reacted for 45min in a nitrogen atmosphere.

[0036] Step 2: Add 180 mg of Zn nanoparticles to the above solution, adjust the pH value of the solution to 9 and react for 5 hours to obtain graphene oxide loaded Mg(OH) 2 and Zn suspension, then transfer the suspension to a polytetrafluoroethylene-lined reactor and seal it, put it in a drying oven at 120°C for 25 hours, filter, wash and dry the reaction product several times, and then calcinate at 300°C for 6 hours , to obtain ZnO and MgO supported by graphene;

[0037] Step 3: Graphene supported ZnO and MgO in Ar and H 2 The reaction was carried ou...

Embodiment 3

[0041] (1) Preparation process of materials:

[0042] Step 1: Take 20mg of graphene oxide in a beaker, add 20mL of deionized water and sonicate for 15 minutes to obtain a uniform light yellow-brown suspension, then place it in a water bath at 25°C for magnetic stirring, let it stand for 12 hours for ion exchange, and then take 400mg AlCl 3 ·6H 2 O and 80mgNaOH were added to the solution, and reacted in a nitrogen atmosphere for 30min.

[0043] Step 2: Add 160 mg of Ni nanoparticles to the above solution, adjust the pH value of the solution to 10.5 and react for 3 hours to obtain graphene oxide supported Al(OH) 3 and Ni suspension, then transfer the suspension to a polytetrafluoroethylene-lined reactor and seal it, put it in a drying oven at 140°C for 18 hours, filter the reaction product several times, wash and dry it, and then calcinate at 280°C for 8 hours , to obtain graphene-supported NiO and Al 2 o 3 ;

[0044] Step 3: Graphene supported NiO and Al 2 o 3 In Ar and...

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Abstract

The invention discloses a multi-element active metal / graphene composite hydrogen storage material with a high hydrogen storage capacity, and a preparation method thereof, and belongs to the technicalfields of graphene and hydrogen storage material applications. The method comprises the following steps: preparing a graphene oxide / active metal salt solution through a liquid phase in-situ generationtechnology, self-assembling transition metals on the surface of graphene oxide in a liquid phase self-assembling manner, carrying out a reaction in a hydrothermal reaction kettle, and carrying out high-temperature reduction in a protective gas and reducing atmosphere to prepare the multi-active metal / graphene composite hydrogen storage material. The method has the advantages of simple process flow, low cost, realization of the loading of multiple metals, suitableness for process amplification, improvement of the process of preparing hydrogen storage materials by conventional physical methods,and obtaining of the hydrogen storage material with the high hydrogen storage capacity (6.2-7.3 wt%). The method is suitable for the loading of graphene to metals (or metal oxides), and the obtainedproduct can be applied to the development of composite materials, solid propellants and hydrogen storage systems.

Description

technical field [0001] The invention relates to a multi-element active metal / graphene composite hydrogen storage material with high hydrogen storage capacity and a preparation method thereof. The invention belongs to the application technical field of graphene and hydrogen storage materials. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. "Cut" different shapes of sheets from graphene, warping can get zero-dimensional fullerene, curling can get one-dimensional barrel-shaped carbon nanotubes, stacking can get three-dimensional graphite, so we think graphene is The basic unit that constitutes other carbon materials is by far the most ideal carbon material (such as figure 1 shown). This unique and special structure endows graphene with superior functional properties such as high specific surface area and abundant p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F9/26H01M8/04089H01M8/0606
CPCB22F9/26C22C1/058H01M8/04089H01M8/0606Y02E60/50
Inventor 顾健何云凤李磊陶博文张小平庞爱民胡建江杨文阳
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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