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

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 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 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 industrialization of this new e...

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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.

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