Preparation method for grapheme hydrogen storage electrode

A graphene and electrode technology, which is applied in the field of nanomaterial preparation, can solve the problems of high price, harsh conditions, and poor stability, and achieve the effects of low cost, simple preparation process, and increased specific surface area

Inactive Publication Date: 2012-08-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Metal hydrides and hydrogen storage alloys have insurmountable defects as hydrogen storage materials, namely harsh conditions for hydrogen storage and discharge, heavy quality, poor stability and high price.

Method used

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  • Preparation method for grapheme hydrogen storage electrode
  • Preparation method for grapheme hydrogen storage electrode
  • Preparation method for grapheme hydrogen storage electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the reaction chamber of the automatic control DC arc hydrogen plasma equipment, the pure graphite block is used as the anode, the pure carbon rod is used as the cathode, and the distance between the two electrodes is 20 mm. 2 , the discharge voltage is 40V, and the discharge current is 90A. A graphene hydrogen storage material is prepared. After the graphene material and the binder PVDF are mixed at a mass ratio of 1:1 to 7:1, after comparing the combination of the mixed sample and the matrix nickel foam, the optimal mixing ratio is determined to be 4:1. This graphene material is made into an electrode sheet as a working electrode, Ni(OH) 2 The / NiOOH electrode is used as the auxiliary electrode, the calomel electrode is used as the reference electrode, and the electrolyte is 6mol / L saturated KOH solution. After the simulated battery is composed, the electrochemical performance is tested.

Embodiment 2

[0024] After vacuuming, 0.05MPa of H 2 , the discharge voltage is 40V, and the discharge current is 90A. A graphene hydrogen storage material is prepared. After the graphene material and the binder PVDF are mixed at a mass ratio of 4:1, the graphene material is made into an electrode sheet as a working electrode, and Ni(OH) 2 The / NiOOH electrode is used as the auxiliary electrode, the calomel electrode is used as the reference electrode, and the electrolyte is 6mol / L saturated KOH solution. After the simulated battery is composed, the electrochemical performance is tested. Other experimental conditions are the same as in Example 1, except that the distance between the two poles is 10mm, and the H 2 is 0.05MPa.

Embodiment 3

[0026] Other experimental conditions are identical with embodiment 1, and difference is: the distance between two poles reaches 30mm, the H 2 is 0.07MPa.

[0027] figure 1 It is the X-ray diffraction (XRD) collection of patterns of the graphene material synthesized according to embodiment one, embodiment two, embodiment three. The XRD pattern shows that the graphene sample has an obvious broadening peak in the range of 20-30°, indicating that it is a disordered state. The appearance of the (002) peak indicates that the prepared graphene is a multilayer sheet structure.

[0028] Fig. 2 (a), (b), (c) are the transmission electron microscope (TEM) figure of the graphene material synthesized according to embodiment one, embodiment two, embodiment three respectively. TEM images (a), (b) and (c) show that the graphene layer spacing prepared in Example 1 is relatively small, and its size is about 0.2 μm. However, the distance between graphene sheets prepared in Example 2 and Exam...

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Abstract

The invention relates to a preparation method for a grapheme hydrogen storage electrode, belonging to the fields of preparation technologies and application of nano materials. The preparation method is characterized in that automatic control direct current arc hydrogen plasma equipment is utilized; a pure graphite block is used as a consumption anode, and a carbon rod is used as a cathode; a certain amount of hydrogen is introduced, and then the steps of evaporation, condensation, passivation and the like are carried out to prepare the grapheme material; the grapheme material is used as an active substance and mixed with a binder according to a certain mass ratio; and then an obtained mixture is dried in an extruding mode to manufacture the electrochemical hydrogen storage electrode. The preparation method has the advantages that the grapheme powder material has simple preparation process, high product purity and low cost, and the volume production can be realized; and because the grapheme product has a large quantity of folds, the specific surface area of the grapheme product is increased, and the bonding mismatching between slices is improved; and interlayer polarization is caused so as to form electrochemical hydrogen storage sites, therefore the hydrogen storage quantity of the grapheme electrode is improved.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation technology and application. It is a method for preparing an electrochemical electrode using graphene as a hydrogen storage material, especially a graphene powder material synthesized by a physical vapor phase method. Background technique [0002] Energy is the basis for the survival and development of human society. In recent years, due to the continuous reduction of non-renewable fossil energy reserves such as oil and coal, environmental pollution has become more and more serious, causing energy shortages, greenhouse effects and other negative effects, making solar energy, nuclear energy, wind energy, geothermal energy, ocean energy, hydrogen energy, etc. The development and utilization of new energy sources are getting more and more attention. The utilization of hydrogen energy includes three aspects: production, storage and transportation, and application. Because hydrogen is a g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04
CPCY02E60/12Y02E60/10
Inventor 董星龙黄昊郭广菲薛方红全燮
Owner DALIAN UNIV OF TECH
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