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A kind of molybdenum disulfide/carbon composite material and its preparation method and application

A carbon composite material and a composite material technology, applied in the field of molybdenum disulfide/carbon composite material and its preparation, can solve the problems of limiting the practical application of molybdenum disulfide material, insufficient electrochemical active sites, large volume expansion, etc. The effect of increasing the electrochemical active area, beneficial to the capacity, and improving the conductivity

Active Publication Date: 2019-12-10
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own poor electrical conductivity, large volume expansion during lithium storage, and insufficient electrochemically active sites in hydrogen evolution reaction, the practical application of molybdenum disulfide materials is greatly limited.

Method used

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  • A kind of molybdenum disulfide/carbon composite material and its preparation method and application
  • A kind of molybdenum disulfide/carbon composite material and its preparation method and application
  • A kind of molybdenum disulfide/carbon composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of molybdenum trioxide nanobelts by hydrothermal method:

[0030] Add 1.21g of sodium molybdate and 0.6g of sodium chloride into 60mL of deionized water to obtain a solution, keep stirring for 10 minutes to obtain a uniform dispersion, add 3mol / L hydrochloric acid solution to adjust the pH to 1, transfer to a hydrothermal kettle in an oven The hydrothermal reaction was carried out at 180°C, and the reaction time was 24h. When the reaction kettle was cooled down to room temperature, the obtained dispersion liquid was subjected to suction filtration to separate the light blue precipitate, and the obtained solid was washed with deionized water. Dry in an oven at 60° C. for 24 hours to obtain molybdenum trioxide nanobelts.

[0031] 2. In situ growth of polypyrrole on molybdenum trioxide nanobelts to obtain molybdenum trioxide / polypyrrole binary composites:

[0032] Add 40 mg of molybdenum trioxide nanobelts obtained above into a 250 mL flask, add 80 ml of de...

Embodiment 2

[0038] 1. Preparation of molybdenum trioxide nanobelts by hydrothermal method:

[0039]Add 1.21g of sodium molybdate and 0.6g of sodium chloride into 60mL of deionized water to obtain a solution, keep stirring for 10 minutes to obtain a uniform dispersion, add 3mol / L hydrochloric acid solution to adjust the pH to 1, transfer to a hydrothermal kettle in an oven The hydrothermal reaction was carried out at 180°C, and the reaction time was 24h. When the reaction kettle was cooled down to room temperature, the obtained dispersion liquid was subjected to suction filtration to separate the light blue precipitate, and the obtained solid was washed with deionized water. Dry in an oven at 60° C. for 24 hours to obtain molybdenum trioxide nanobelts.

[0040] 2. In situ growth of polypyrrole on molybdenum trioxide nanobelts to obtain molybdenum trioxide / polypyrrole binary composites:

[0041] Add 40 mg of the molybdenum trioxide nanobelts obtained above into a 250 mL flask, add 80 mL of...

Embodiment 3

[0045] 1. Preparation of molybdenum trioxide nanobelts by hydrothermal method:

[0046] Add 1.21g of sodium molybdate and 0.6g of sodium chloride into 60mL of deionized water to obtain a solution, keep stirring for 10 minutes to obtain a uniform dispersion, add 3mol / L hydrochloric acid solution to adjust the pH to 1, transfer to a hydrothermal kettle in an oven The hydrothermal reaction was carried out at 180°C, and the reaction time was 24h. When the reaction kettle was cooled down to room temperature, the obtained dispersion liquid was subjected to suction filtration to separate the light blue precipitate, and the obtained solid was washed with deionized water. Dry in an oven at 60° C. for 24 hours to obtain molybdenum trioxide nanobelts.

[0047] 2. In situ growth of polypyrrole on molybdenum trioxide nanobelts to obtain molybdenum trioxide / polypyrrole binary composites:

[0048] Add 40 mg of molybdenum trioxide nanobelts obtained above into a 250 mL flask, add 80 mL of de...

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Abstract

The invention relates to a molybdenum disulfide / carbon composite material, a preparing method thereof and applications of the composite material. Molybdenum disulfide in the composite material is limited in a carbon layer having a hollow nanobelt structure, and an outer layer of the composite material is a nitrogen-doped carbon layer. The method includes preparing a molybdenum trioxide nanobelt through a hydrothermal process; performing a low-temperature reaction to achieve in-situ growth of polypyrrole on the surface of the molybdenum trioxide nanobelt so as to obtain a molybdenum trioxide-polypyrrole binary composite material having a core-shell structure; and preparing the molybdenum disulfide / carbon composite material through high-temperature sulfurization. The molybdenum disulfide / carbon composite material prepared by the method can be utilized as an ideal electrode material for high-performance supercapacitors, lithium ion batteries, solar cells, and other new energy sources. The molybdenum disulfide / carbon composite material has advantages of stable chemical properties, good conductivity, a high capacity, and the like.

Description

technical field [0001] The invention belongs to the technical field of carbon composite materials, in particular to a molybdenum disulfide / carbon composite material and its preparation method and application. Background technique [0002] As a typical transition metal sulfide, molybdenum disulfide has a special layered structure, and its weak van der Waals force between layers is conducive to the intercalation and deintercalation of Li+, and molybdenum disulfide also has good electric double layer charge storage. ability, so it has a high theoretical lithium storage capacity, and has a good application prospect as an anode material for lithium-ion batteries. Meanwhile, due to its preferentially exposed active sites and long-range / short-range ordered atomic arrangement, nanostructured MoS2 electrocatalysts are expected to replace noble metal Pt for electrochemical hydrogen evolution reaction. However, due to its own poor electrical conductivity, large volume expansion during...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/36H01M4/583H01M4/62H01G11/36H01G11/26H01G11/30H01L31/0224
CPCH01G11/26H01G11/30H01G11/36H01L31/022425H01M4/362H01M4/5815H01M4/583H01M4/625Y02E10/50Y02E60/10Y02E60/13
Inventor 张超刘颖刘天西王开伏璀玫晁国杰李乐刘思良
Owner DONGHUA UNIV
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