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Preparation method of graphene/molybdenum disulfide composite material

A molybdenum disulfide and composite material technology, which is applied to secondary batteries, electrochemical generators, active material electrodes, etc., can solve the problems of cumbersome steps, difficult to disperse, easy to agglomerate, etc., and achieve the effect of simple synthesis steps and low cost.

Inactive Publication Date: 2016-07-20
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the synthesis methods for graphene / molybdenum disulfide composite materials first synthesize graphene oxide (GO) by the Hummers method, and then synthesize it with sodium molybdate and other raw materials to reduce graphite oxide to graphene (RGO), sulfur source, The molybdenum source is converted into molybdenum disulfide, the steps are cumbersome and the yield is low
In addition, graphene oxide synthesized by hydrothermal method has the defect of being hydrophilic and difficult to be lipophilic, and it is easy to agglomerate and difficult to disperse in organic solvents, which also limits its practical application as a negative electrode material for lithium-ion batteries to a certain extent.

Method used

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  • Preparation method of graphene/molybdenum disulfide composite material
  • Preparation method of graphene/molybdenum disulfide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Prefabrication of raw materials

[0028] Take by weighing 0.8g glucose, 0.5g ammonium tetrathiomolybdate, after fully mixing in glove box, place in agate mortar and grind for 30min, obtain mixture A; Take by weighing 11.5g sodium chloride and 11.5g potassium chloride, After mixing thoroughly, place it in a ball mill and grind for 30 minutes to obtain mixture B; mix mixtures A and B, and place them in a square porcelain boat. The total amount of the mixture should not exceed two-thirds of the total amount of the porcelain boat.

[0029] 2. Material pretreatment

[0030] The mixture obtained in step 1 was placed in a vacuum drying oven, and heat-treated at 80°C for 10;

[0031] 3. Environmental reaction of molten salt

[0032] Place the mixture obtained in step 2 in the middle of the tube furnace tube, pass through nitrogen protection, heat up to 950 °C at a heating rate of 5 °C / min, after reaching the target temperature, keep it warm for 30 min, cool naturally to ro...

Embodiment 2

[0036] 1. Prefabrication of raw materials

[0037] Take by weighing 0.1g glucose, 0.1g ammonium tetrathiomolybdate, after fully mixing in the glove box, place in the agate mortar and grind for 50min, obtain mixture A; Take by weighing 11.4g sodium chloride and 2.8g potassium chloride, After mixing thoroughly, place it in a ball mill and grind for 50 minutes to obtain mixture B; mix mixtures A and B, and place them in a square porcelain boat. The total amount of the mixture should not exceed two-thirds of the total amount of the porcelain boat.

[0038] 2. Material pretreatment

[0039] The mixture obtained in step 1 was placed in a vacuum drying oven, and after heat treatment at 150° C. for 20 h;

[0040] 3. Environmental reaction of molten salt

[0041] Place the mixture obtained in step 2 in the middle of the tube furnace tube, pass through nitrogen protection, heat up to 1000 °C at a heating rate of 20 °C / min, after reaching the target temperature, keep it warm for 40 min...

Embodiment 3

[0045] 1. Prefabrication of raw materials

[0046] Take by weighing 0.5g glucose, the ammonium chloride of 1g, 0.05g ammonium tetrathiomolybdate, after fully mixing in glove box, place in the agate mortar and grind 60min, obtain mixture A; Take by weighing 13.5g sodium chloride and 11.5g of potassium chloride, mixed thoroughly and placed in a ball mill to grind for 60 minutes to obtain mixture B; mix mixtures A and B and place in a square porcelain boat, the total amount of the mixture should not exceed 2 / 3 of the total amount of the porcelain boat.

[0047] 2. Material pretreatment

[0048] Place the mixture obtained in step 1 in a vacuum drying oven, heat-treat at 200°C for 30 hours, and take it out after naturally cooling down to room temperature;

[0049] 3. Environmental reaction of molten salt

[0050] Place the mixture obtained in step 2 in the middle of the tube furnace tube, pass through nitrogen protection, heat up to 1300 °C at a heating rate of 30 °C / min, after r...

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Abstract

The invention relates to a preparation method of a graphene / molybdenum disulfide composite material. The preparation method comprises the following process steps: (1) mixing glucose with ammonium tetrathiomolybdate, and performing grinding in an agate mortar; (2) mixing sodium chloride with potassium chloride, and performing ball milling in a ball milling machine; (3) uniformly mixing the material obtained in the step (1) with the material obtained in the step (2), and performing preheating treatment; (4) placing the mixed material after preheating treatment in a square porcelain boat, placing the porcelain boat in the middle position of a tubular furnace, leading inert gas for protection, and performing calcination under a certain heating rate; (5) performing heat preservation treatment after calcination; (6) under inert-gas protection, cooling naturally to room temperature, and taking out samples; (7) cleaning the obtained mixture with deionized water, and performing vacuum filtration so as to obtain products. According to the preparation method disclosed by the invention, cheap glucose is used as a carbon source, so that a new method for synthetizing graphene / molybdenum disulfide nanocomposite materials is obtained, the synthesis steps are simple, the cost is low, and the preparation method has an industrial application value.

Description

【Technical field】 [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a graphene / molybdenum disulfide composite material, and belongs to the technical field of new energy materials. 【Background technique】 [0002] Compared with traditional batteries, lithium-ion batteries have the advantages of higher working voltage, higher specific energy, safer and no memory. Since the 21st century, environmental pollution has become more and more serious, and energy shortage has become an important problem restricting the progress and development of human society, which forces people to urgently develop and manufacture more energy-saving and environmentally friendly living transportation methods to reduce the massive use of petrochemical energy. Among them, the large-scale use of various electric vehicles is an important alternative that can reduce environmental pollution. In addition, in order to ensure a good battery...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M4/136H01M4/1397H01M10/0525
CPCH01M4/136H01M4/1397H01M4/362H01M4/5815H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 李天军
Owner SHAOXING UNIVERSITY
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