Three-dimensional network carbon nano tube and preparation method and usage thereof

Abstract

The invention discloses a three-dimensional network carbon nano tube and a preparation method and a usage thereof. The carbon nano tube comprises a three-dimensional carbon nano tube in which a horizontal carbon nano tube is communicated between vertical carbon nano tubes, wherein one or more than one thin carbon nano tube of which the tube diameter is 18-22 nm is installed in each of the verticalcarbon nano tubes and the horizontal carbon nano tubes. The method comprises the following steps: to obtain a three-dimensional through-hole aluminium oxide template of which the hole wall contains impurities by using an anodic oxidation method, especially, placing the template in nickel sulfate solution firstly and soaking, washing by using plasma, and placing in a mixed atmosphere of argon andacetylene, for at least 1 h in 600-700 DEG C of the temperature, to obtain an anodised aluminium template, wherein the carbon nano tube is placed in a three-dimensional through-hole, and the thin carbon nano tube is placed in the carbon nano tube, and then, placing in alkali solution and corroding the aluminium oxide template, to obtain a target product. The three-dimensional network carbon nano tube is large in surface capacitance, and high in conductivity, and has the important application prospect in the field of electrochemical energy storage devices with both the ultra-high power densityand the higher capacity.

Description

technical field [0001] The invention relates to a carbon nanotube and its preparation method and application, especially a three-dimensional network carbon nanotube and its preparation method and application. Background technique [0002] Three-dimensional structured carbon materials with large specific surface areas have important application prospects in electrochemical energy storage and environmental governance. Although the three-dimensional carbon nanotube array is a good electrochemical electrode material, however, because carbon nanotubes, like other one-dimensional nanomaterials, have a high aspect ratio, it is easy to form agglomerations at the top, resulting in carbon nanotubes The length of the arrays that are kept isolated from each other is usually less than 10 μm; and the thinner carbon nanotube arrays cause the surface capacitance to be too small. Therefore, the synthesis of vertical carbon nanotube arrays with a certain thickness parallel to each other and i...

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Problems solved by technology

Although the three-dimensional carbon nanotube array is a good electrochemical electrode material, however, because carbon nanotubes, like other one-dimensional nanomaterials, have a high aspect ratio, it is easy to form agglomerations at the top, resulting in carbon nanotubes The length of the arrays that are kept isolated from each other is usually less than 10 μm; and the thinner carbon nanotube arrays cause the surface capacitance to be too small. Therefore, the synthesis of vertical carbon nanotube arrays with a certain thickness parallel to each other and isolated from each other is useful in the field of electrochemical energy storage. is of great significance

Although this product has a better three-dimensional carbon network structure, there are still shortcomings. First, the tube lumens of the vertical carbon tubes and transverse carbon tubes that make up the three-dimensional carbon network structure are hollow, which leads to the partial surface capacitance of the product. small; Secondly, the conductivity of the product is too low, only 159S / m

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