Method utilizing atomized ethanol assisted penetration high-temperature pyrolysis to prepare carbon nanotube array/transition metal oxide coaxial structural material

Abstract

The invention discloses a method utilizing atomized ethanol assisted penetration high-temperature pyrolysis to prepare a carbon nanotube array / transition metal oxide coaxial structural material. Different composite structures can be obtained by reasonably controlling the concentration of catalyst in raw materials, the pyrolysis time, the species of the oxide precursor, and the pyrolysis time and pyrolysis temperature of ethanol solution. The metal oxide is evenly covered on the surface of the carbon nanotube array. The density and diameter of the coaxial structure and the coating thickness of the oxide are adjustable, the stable coating layer of the composite structure can tolerate overgrowth and cannot be peeled off basically, and thus the coaxial structural can exert excellent electrochemical properties.

Description

technical field [0001] The invention relates to the field of nanomaterial research, in particular to a method for preparing a carbon nanotube array / transition metal oxide coaxial structure material by means of atomized ethanol-assisted infiltration high-temperature pyrolysis. Background technique [0002] With the development of society, the increasing global energy consumption and the serious impact of the use of fossil fuels on the environment, fuel cells, as a clean and efficient energy conversion device, have high energy conversion efficiency, environmental protection, low noise, safety and reliability. The advantages are renewable to a certain extent, so they have attracted much attention. The use of metal platinum as an electrocatalyst in classic fuel cells is expensive, and platinum poisoning and poor durability have become the main bottlenecks restricting the commercialization of fuel cells. [0003] Transition metal oxides (MOs) are widely used in research in many ...

AI Technical Summary

Problems solved by technology

In order to well composite carbon nanotube arrays (VACNTs) with transition metal oxides (MOs), three practical issues need to be addressed: (1) The high density of carbon nanotubes in VACNTs and the limited space between tubes are not conducive to MOs (2) The inherent hydrophobicity of CNTs is not conducive to the entry of aqueous solution into the intertube of carbon nanotubes (3) The growth and recombination of VACNTs are two separate processes, and the transfer recombination process of VACNTs may destroy the ordered array of VACNTs

[0004] In recent years, some researchers have used electrochemical deposition, atomic layer deposition, and microwave-assisted techniques to combine VACNTs and MOs as electrode materials for supercapacitors and lithium-ion batteries, which exhibit good electrochemical performance, but have not completely solved The three problems mentioned above, especially the 3D structure of VACNTs to obtain high-quality composite MOs, make the 3D composites based on VACNTs not show the expected performance.

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