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Tungsten disulfide/carbon nanofiber composite material, and preparation method and use thereof

A carbon nanofiber and tungsten disulfide technology, which is applied in the field of tungsten disulfide/carbon nanofiber composite materials and its preparation, can solve the problems of easy agglomeration, conductivity, and performance suppression, and achieve easy agglomeration, rich pores, and enhanced The effect of conductivity

Inactive Publication Date: 2017-08-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, tungsten disulfide nanosheets often have the problems of easy agglomeration and poor conductivity, which largely inhibit the performance of the material.

Method used

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  • Tungsten disulfide/carbon nanofiber composite material, and preparation method and use thereof
  • Tungsten disulfide/carbon nanofiber composite material, and preparation method and use thereof
  • Tungsten disulfide/carbon nanofiber composite material, and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment includes the following steps:

[0041]Weigh 1.2 g of polyacrylonitrile powder and add it into 10 mL of DMF, and stir at a high speed for 8 hours under heating in an oil bath at 85° C. to obtain a clear polyacrylonitrile solution. Electrospinning was carried out on the above polyacrylonitrile solution, and the spinning parameters were set as: flow rate 0.28mm / min, voltage 22kV, receiving distance 18cm. The prepared polyacrylonitrile nanofibers were finally deposited on the roller receiver in the form of nanofiber film, and the fiber film was peeled off and stored in a vacuum oven for 24 hours to remove residual DMF. The dried polyacrylonitrile fiber membrane was fixed on a flat plate and transferred to a temperature-programmed oven for pre-oxidation treatment. The temperature was raised from room temperature to 250 °C at a rate of 1.5 °C / min and kept for 2.5 h, and then cooled down to room temperature naturally. The color of the polyacrylonitrile fiber m...

Embodiment 2

[0049] This embodiment includes the following steps:

[0050] The steps for preparing the electrospun carbon nanofiber membrane are the same as in Example 1.

[0051] Weigh 180mg and 300mg ammonium tetrathiotungstate respectively and add them to 30mL DMF, ultrasonicate and stir to prepare ammonium tetrathiotungstate solutions with concentrations of 6mg / mL and 10mg / mL respectively. Weigh two 30mg carbon nanofiber membranes and add them to the above two solutions respectively, transfer them to a polytetrafluoroethylene-lined reaction kettle, react in an oven at 200°C for 12 hours, take them out, wash and dry the products to obtain Two tungsten disulfide / carbon nanofiber composite membrane materials with higher loading capacity.

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] Weigh 60 mg of ammonium tetrathiotungstate powder, add it into 30 mL of DMF, ultrasonicate and stir to obtain ammonium tetrathiotungstate solution with a concentration of 2 mg / mL. Transfer the above solution to a polytetrafluoroethylene-lined reactor, react in an oven at 200°C for 12 hours, take it out, and centrifuge, wash, and dry the product to obtain pure tungsten disulfide.

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Abstract

The invention provides a tungsten disulfide / carbon nanofiber composite material, and a preparation method and a use thereof. The preparation method comprises the following steps: (1) preparing a polyacrylonitrile spinning solution under high-speed stirring and oil bath conditions; (2) producing polyacrylonitrile nanofibers through adopting an electrostatic spinning technology; (3) pre-oxidizing the polyacrylonitrile nanofibers obtained in step (2) through temperature programmed control; (4) carbonizing the pre-oxidized polyacrylonitrile nanofibers obtained in step (3) through stepwise heating; (5) adding a certain amount of a tungsten disulfide precursor compound into a solvent, and carrying out ultrasonic treatment to obtain a tungsten disulfide precursor solution; and (6) immersing the above obtained carbon nanofiber membrane in the tungsten disulfide precursor solution, placing the obtained mixture in a high pressure reactor, and carrying out a solvothermal reaction at a certain temperature to obtain the tungsten disulfide / carbon nanofiber composite material. The preparation method has the advantages of simple process, easiness in operation, and environmental protection of used polymer and reagents.

Description

technical field [0001] The invention belongs to the field of functionalized composite carbon nanometer materials, in particular to a tungsten disulfide / carbon nanofiber composite material and a preparation method thereof. Background technique [0002] With the decrease of fossil energy and frequent occurrence of extreme climates, scientists all over the world are committed to developing renewable, low-cost and environmentally friendly energy storage and conversion technologies to meet the needs of mobile electronic devices and new The energy demand brought about by the rapid development of energy vehicles. Among them, supercapacitors, fuel cells, and lithium-ion batteries are considered to be the three most promising electrochemical energy storage and conversion systems. The key to determining the performance of these new energy systems lies in the design and development of high-performance electrode materials and catalyst materials. In order to promote the industrializati...

Claims

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Application Information

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IPC IPC(8): D06M11/53D01F9/22B82Y30/00H01G11/24H01G11/30H01G11/36H01G11/44H01M4/58H01M4/62H01M4/90B01J27/047D06M101/40
CPCH01M4/5815H01M4/625H01M4/9083H01G11/24H01G11/30H01G11/36H01G11/44D01F9/22D06M11/53B82Y30/00B01J27/047D06M2101/40B01J35/33Y02E60/50Y02E60/10
Inventor 黄云鹏袁寿其李华明崔芬赵岩包健
Owner JIANGSU UNIV
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