Preparation method of carbon nanotube composite material

Abstract

The invention discloses a preparation method of a carbon nanotube composite material, which belongs to the field of preparation of electrode materials. According to the method, a Prussian blue analogue synthesized by a normal-temperature deposition method is used as a precursor, and then nitrogen and carbon source gas are sequentially introduced to carry out heat treatment on the Prussian blue analogue, and the nitrogen-doped carbon nanotube composite material wrapping the transition metal particles is prepared. After cyano in the Prussian blue analogue is converted into cyanogen gas, transition metal ions in the precursor can be reduced into transition metal, the transition metal is used as a catalyst for catalyzing growth of the carbon nanotubes, and the carbon element and external carbon source gas are used as carbon sources. The Prussian blue analogue has multiple functions of serving as a reducing agent and a catalyst and providing part of a carbon source, and not only has the advantages of energy conservation and environmental protection, but also the prepared carbon nanotube is uniform in diameter, can improve the electrochemical performance of an electrochemical device as an electrode material, and has important research value and application significance.

Description

Technical field[0001]The present invention belongs to the technical field of electrode material preparation, and more particularly to a method of preparing a carbon nanotube composite material.Background technique[0002]Carbon nanotubes have caused great attention due to their unique physical and chemical properties in the application of supercapacitor electrode materials, such as high conductivity, high ratio surface area, good corrosion resistance, pore structure controllability, and low cost, and Its energy storage mechanism is a dual-layer layer storage capacity that is lower than the capacitance and energy density. Therefore, carbon nanotubes often composite with the electrode material having the Faraday energy mechanism, such as transition metal oxide, hydroxide, transition metal, and the like, and the current composite electrode material is mostly the electrode material of the Faraday energy, which is covered with carbon. The nanotube surface, and the electrode material of the...

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Problems solved by technology

[0003] In order to overcome the defects of low specific capacitance of carbon nanotubes in the prior art, poor cycle life due to unstable composite material structure, non-uniform particle size of materials obtained by ordinary carbon nanotube preparation technology, large consumption of hydrogen and carbon source gas, etc., the present invention provides A kind of preparation method of carbon nanotube composite material

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