Carbon nanotube array slices with precisely controlled length and diameter and preparation method and application thereof

Abstract

The invention belongs to the technical field of electrodes, and particularly relates to carbon nanotube array slices with precisely controlled length and diameter and a preparation method and application thereof. The preparation method comprises the following steps: growing an orientated carbon nanotube array by a chemical vapor deposition method; by taking the orientated carbon nanotube array as a template and taking ethylene as a carbon source, growing a coaxial graphene layer on the surface of the orientated carbon nanotube array by the chemical vapor deposition method, thus obtaining an orientated carbon nanotube array with a core-shell structure, wherein various heteroatoms can be introduced in a doping way in the growth process; finally cutting the carbon nanotube array along a diameter direction in a freezing slicing way, and regulating and controlling feeding distance to obtain the highly controllable carbon nanotube array slices. By taking the carbon nanotube array slices as an electrode material, a prepared lithium ion battery has excellent energy storage property, and the specific capacity of the battery can reach 2450mAh / g maximally.

Description

technical field [0001] The invention belongs to the technical field of electrodes, and in particular relates to a carbon nanotube array slice with a precisely controllable length and diameter, a preparation method and application thereof. Background technique [0002] For nanomaterials, adjusting the structure and morphology through the preparation process is crucial to their properties and applications [1-4] . On the other hand, the precise control of the aggregation structure of nanomaterials can extend their excellent properties to the macroscopic scale. [5,6] . Although researchers have been committed to the research and development of nanomaterial processing methods, it is still challenging to achieve low-cost and high-efficiency processing of nanomaterials in the application field. [7-9] . For example, one-dimensional nanotubes, as a major class of nanomaterials, are widely used in various cutting-edge applications. However, in order to extend the excellent proper...

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Problems solved by technology

However, in order to extend the excellent properties of 1D nanotubes from the microscopic scale to the macroscopic domain, it is quite difficult to precisely control their size, composition, and aggregation structure.

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