Molybdenum disulfide/nitrogen doped carbon composite material and preparation method and application thereof

A technology of nitrogen-doped carbon and molybdenum disulfide, which is applied to electrical components, battery electrodes, circuits, etc., can solve the problems of unstable structure and poor conductivity of molybdenum disulfide, so as to improve the conductivity and structural stability and improve the preparation process. The effect of simplicity and good application prospects

Active Publication Date: 2019-01-25
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the defects of poor electrical conductivity and unstable structure of molybdenum disulfide described in the above-mentioned prior art, the present invention provides a preparation method of molybdenum disulfide / nitrogen-doped carbon composite material, and the disulfide disulfide prepared by the preparation method Molybdenum / nitrogen-doped carbon composite material makes molybdenum disulfide more conductive and more stable

Method used

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  • Molybdenum disulfide/nitrogen doped carbon composite material and preparation method and application thereof
  • Molybdenum disulfide/nitrogen doped carbon composite material and preparation method and application thereof
  • Molybdenum disulfide/nitrogen doped carbon composite material and preparation method and application thereof

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Embodiment 1

[0070] S1. Dissolve 16.74 mmol of galactosamine in 60 mL of deionized water under stirring to form a solution, and adjust the pH value of the solution to 5 with concentrated hydrochloric acid;

[0071] S2. Add 0.215 mmol of ammonium molybdate and 9 mmol of thiourea under stirring. After all dissolved, the molar ratio of molybdenum atoms in galactosamine and ammonium molybdate in the solution is 11.1:1, the molar ratio of molybdenum atoms in thiourea and ammonium molybdate is 6:1, and the concentration of galactosamine is 0.28 mol / L;

[0072] S3. Transfer this solution to a 100 mL stainless steel reactor lined with polytetrafluoroethylene. Placed in a dry box, hydrothermally reacted at 220°C for 24 hours. Then cool naturally to room temperature, rinse with deionized water and absolute ethanol three times respectively, centrifuge and vacuum dry at 60°C for 12 hours to obtain a hydrothermal product;

[0073] S4. Put a certain amount of hydrothermal product in a porcelain boat...

Embodiment 2

[0075] The difference between this embodiment and Example 1 is that the mol ratio of molybdenum atoms in galactosamine and ammonium molybdate in the solution of this embodiment is 9.3: 1, and the mol ratio of molybdenum atoms in thiourea and ammonium molybdate is 5: 1. The concentration of galactosamine is 0.23 mol / L, the pH value is 4, and the calcination temperature is 800 ℃;

[0076] Other conditions and operation steps are identical with embodiment 1.

Embodiment 3

[0078] The difference between this embodiment and Example 1 is that the mol ratio of molybdenum atoms in galactosamine and ammonium molybdate in the solution of the present embodiment is 7.4: 1, and the mol ratio of molybdenum atoms in thiourea and ammonium molybdate is 5: 1. The concentration of galactosamine is 0.19 mol / L, the pH value is 3, the temperature of hydrothermal reaction is 200 ℃, and the temperature of calcination is 800 ℃;

[0079] Other conditions and operation steps are identical with embodiment 1.

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Abstract

The invention discloses a molybdenum disulfide/nitrogen doped carbon composite material and a preparation method and application thereof. The preparation method of the molybdenum disulfide/nitrogen doped carbon composite material comprises the following steps: S1. Preparing an acidic galactosamine solution; 2, adding a molybdenum source and a sulfur source into that galactosamine solution to obtain a mixed solution; The molar ratio of galactosamine to molybdenum atom in molybdenum source is (1.4-14.3): 3, carrying out a hydrothermal reaction on that mixed solution, and after post-treatment, obtaining a solid product; 4, heating a solid product in an inert atmosphere to obtain molybdenum disulfide/nitrogen doped carbon composite material. The preparation method of the molybdenum disulfide/nitrogen doped carbon composite material provided by the invention uses galactosamine as carbon source and nitrogen source, and combines hydrothermal method and heat treatment technology. The molybdenum disulfide/nitrogen doped carbon composite prepared by the preparation method improves the conductivity and structural stability of molybdenum disulfide.

Description

technical field [0001] The invention relates to the field of micro-nano composite materials, more specifically, to a molybdenum disulfide / nitrogen-doped carbon composite material and its preparation method and application. Background technique [0002] In contemporary society, energy issues have undoubtedly become one of the major global issues and have attracted widespread attention. Finding new materials that can have special effects in energy storage and use has become one of the important tasks of scientists. For the research on anode materials for lithium-ion batteries, graphite-based carbon materials are still the preferred anode materials for lithium-ion batteries in the future due to their good cycle stability, ideal charge-discharge platform and the highest cost performance at present. However, the charge-discharge specific capacity of carbon materials is low, and the volume specific capacity has no advantage. Therefore, it is necessary to develop new negative elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/62
CPCH01M4/364H01M4/38H01M4/5815H01M4/625Y02E60/10
Inventor 马琳许丽梅周晓平唐晓山凌妍
Owner LINGNAN NORMAL UNIV
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