Preparation method for molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material and application of molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material

A nitrogen-doped graphene and molybdenum disulfide technology, applied in the field of energy storage materials, can solve the problems of inability to adapt to large-scale production of electrode materials and low yield

Inactive Publication Date: 2015-03-11
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

However, the yield of this method is extremely low and cannot meet the requirements of large-scale production of electrode materials (W Fu

Method used

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  • Preparation method for molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material and application of molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material
  • Preparation method for molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material and application of molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material
  • Preparation method for molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material and application of molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material

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Example Embodiment

[0027] Example 1:

[0028] Add molybdenum disulfide powder and N-methylpyrrolidone solvent to the autoclave, react at 210℃ for 2 hours, after cooling, use a probe ultrasonic pulverizer to sonicate the molybdenum disulfide N-methylpyrrolidone solution for 1 hour, and then disperse The solution was centrifuged at 1500 rpm for 40 minutes, and the upper layer was the stripped molybdenum disulfide / N-methylpyrrolidone dispersion. The molybdenum disulfide / N-methylpyrrolidone dispersion with a solute mass of 30 mg was added to the graphene oxide aqueous solution with a solute mass of 30 mg, and stirred to form a uniform molybdenum disulfide / graphene oxide dispersion. Add 300 mg of sodium chloride and stir until it is completely dissolved. After 24 hours of coagulation of the dispersion, the lower layer of floc is centrifuged to obtain a molybdenum disulfide / graphene oxide three-dimensional assembly. Add hydrazine hydrate solution (mass fraction 80%, 10ml) to molybdenum disulfide / graphen...

Example Embodiment

[0029] Example 2:

[0030] Add molybdenum disulfide powder and N-methylpyrrolidone solvent to the autoclave, react at 220°C for 3 hours, after cooling, use a probe ultrasonic pulverizer to sonicate the molybdenum disulfide N-methylpyrrolidone solution for 1 hour, and then disperse The solution was centrifuged at 1500 rpm for 45 minutes, and the upper layer was the stripped molybdenum disulfide / N-methylpyrrolidone dispersion. The molybdenum disulfide / N-methylpyrrolidone dispersion with a solute mass of 60 mg was added to the graphene oxide aqueous solution with a solute mass of 30 mg, and stirred to form a uniform molybdenum disulfide / graphene oxide dispersion. Add 300 mg of sodium chloride and stir until it is completely dissolved. After 24 hours of coagulation of the dispersion, the lower layer of floc is centrifuged to obtain a molybdenum disulfide / graphene oxide three-dimensional assembly. Add hydrazine hydrate solution (mass fraction 80%, 12ml) to molybdenum disulfide / graphe...

Example Embodiment

[0031] Example 3:

[0032] Add molybdenum disulfide powder and N-methylpyrrolidone solvent to the autoclave, react at 220°C for 3 hours, after cooling, use a probe ultrasonic pulverizer to sonicate the molybdenum disulfide N-methylpyrrolidone solution for 1 hour, and then disperse The solution was centrifuged at 1500 rpm for 45 minutes, and the upper layer was the stripped molybdenum disulfide / N-methylpyrrolidone dispersion. The molybdenum disulfide / N-methylpyrrolidone dispersion with a solute mass of 90 mg was added to the graphene oxide aqueous solution with a solute mass of 30 mg, and stirred to form a uniform molybdenum disulfide / graphene oxide dispersion. Add 300 mg of sodium chloride and stir until it is completely dissolved. After 24 hours of coagulation of the dispersion, the lower layer of floc is centrifuged to obtain a molybdenum disulfide / graphene oxide three-dimensional assembly. Add hydrazine hydrate solution (mass fraction 80%, 12ml) to molybdenum disulfide / graphe...

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Abstract

The invention relates to a preparation method for a molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material. The preparation method comprises the steps: preparing a few-layer molybdenum disulfide nanosheet dispersion solution from molybdenum disulfide powder serving as a raw material and N-methyl pyrrolidone serving as an intercalation solvent by an ultrasonic solvent thermal intercalation stripping method, mixing the few-layer molybdenum disulfide nanosheet dispersion solution with a graphene oxide aqueous solution to prepare a uniform molybdenum disulfide/graphene oxide dispersion system with different proportions, forming a compact molybdenum disulfide/graphene oxide composite structure from a solution under the action of sodium ions in a solution self-assembling process, performing in-situ reducing by using hydrazine hydrate to obtain a molybdenum disulfide/reduced graphene oxide three-dimensional composite system, and performing high-temperature nitrogen doping process under an ammonia atmosphere so as to obtain the molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material. The method can be used for better balancing component control and structure control; the process is simple, and large-scale production is easy. The obtained molybdenum disulfide/nitrogen-doped graphene three-dimensional composite material can be applied to negative electrodes of high-performance lithium batteries.

Description

technical field [0001] The invention relates to a preparation method and application of a molybdenum disulfide / nitrogen-doped graphene three-dimensional composite material, which belongs to the technical field of energy storage materials. Background technique [0002] In recent years, with the rapid consumption of fossil fuels and increasing air pollution, people have accelerated the pace of research and development of new energy materials. Molybdenum disulfide is a two-dimensional lamellar crystal material, and its special layered structure provides the possibility for the intercalation and extraction of lithium ions, so this material has received more and more research on lithium-ion battery electrodes. Liu et al. used the heavy stacking effect to increase the distance between the stripped molybdenum disulfide nanosheets to a certain extent, which enhanced its cycle capacity and cycle stability at low currents (GD Du, HK Liu, et al.Superior stability and high capacity of ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/13H01M4/133H01M4/136H01M4/38H01M4/5815H01M4/587H01M10/0525Y02E60/10
Inventor 封伟刘耕冯奕钰李瑀
Owner TIANJIN UNIV
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