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 its preparation method and use. The preparation steps are as follows: (1) Under high-speed stirring and oil bath conditions, prepare a polyacrylonitrile spinning solution; (2) Use Preparing polyacrylonitrile nanofibers by electrospinning; (3) Pre-oxidizing the polyacrylonitrile nanofibers in step (2) through programmed temperature control; (4) Pre-oxidizing the polyacrylonitrile nanofibers in step (3) through staged temperature rise The treated polyacrylonitrile nanofibers are carbonized; (5) Add a certain amount of tungsten disulfide precursor compound to the solvent, and obtain a tungsten disulfide precursor solution by ultrasonic; (6) Dip the carbon nanofiber membrane into the tungsten disulfide precursor into a bulk solution, and then placed in a high-pressure reactor to perform a solvothermal reaction at a certain temperature to obtain a tungsten disulfide / carbon nanofiber composite material. The preparation process of the invention is simple, easy to operate, and the polymers and reagents used are environmentally friendly.

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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