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Preparation method and application of carbon nanotube/titanium dioxide coaxial nanometer cable composite material

A technology of titanium dioxide and carbon nanotubes, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as low ion diffusion coefficient, hindering application, and low conductivity

Inactive Publication Date: 2013-07-17
XINJIANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a semiconductor material, titanium dioxide has a low ion diffusion coefficient and low conductivity, which hinders the further application of this material.

Method used

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  • Preparation method and application of carbon nanotube/titanium dioxide coaxial nanometer cable composite material
  • Preparation method and application of carbon nanotube/titanium dioxide coaxial nanometer cable composite material
  • Preparation method and application of carbon nanotube/titanium dioxide coaxial nanometer cable composite material

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Embodiment 1

[0019] The present invention will be described in further detail below in conjunction with specific embodiments.

[0020] 1. Preparation of polydivinylbenzene: Put 100 g of n-heptane in a 250 mL single-necked flask, add 4 g of monomer divinylbenzene to form a solution, and then add 150 mg (10 drops) of trifluoro Boronium diethyl ether complex was used as an initiator. After sealing, a large amount of reddish-brown precipitate was obtained by ultrasonication in an ultrasonic wave. After 15 minutes, ethanol was added to terminate the reaction, and a white cotton mass was obtained by filtration.

[0021] 2. Preparation of sulfonated polydivinylbenzene: Weigh 0.2 g of dry polymer nanotubes into a flask, add 30 mL of concentrated sulfuric acid, place in a constant temperature environment of 50°C for sulfonation for 12 h, dilute with a large amount of water, filter, Dry to obtain the product. figure 1 It is a TEM photo of sulfonated polydivinylbenzene, which is a bamboo-shaped nano...

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Abstract

The invention provides a preparation method of a carbon nanotube / titanium dioxide coaxial nanometer cable composite material. The preparation method comprises the following steps of: carrying out sulfonation and modification on the surface of a bamboo-like polymer nanotube which is used as a template and a carbon source; and inducting titanium tetrabutoxide to hydrolyze by gel and roast in an inert atmosphere to prepare the carbon nanotube / titanium dioxide coaxial nanometer cable composite material. The carbon nanotube / titanium dioxide coaxial nanometer cable composite material is composed of a carbon nanotube core layer, which is of a hierarchical pore, and a titanium dioxide shell layer which is of a mesoporous structure. As a lithium ion battery negative electrode material, the carbon nanotube / titanium dioxide coaxial nanometer cable composite material has better specific capacity and cycling stability, and can be used for showing reversible lithium storage capacity of 231mAh / g after being circulated by 100 cycles under the current of 1000mA / g. The preparation method of the carbon nanotube / titanium dioxide coaxial nanometer cable composite material provided by the invention is simple in process and capable of easily obtaining materials; moreover, the carbon nanotube / titanium dioxide coaxial nanometer cable composite material can be produced in a large-scale manner, excellent in performances, and therefore, the composite material is a lithium ion battery negative electrode material with a favorable application prospect.

Description

technical field [0001] The invention belongs to the field of inorganic composite materials, and specifically relates to the preparation of carbon nanotube / titanium dioxide coaxial nanotubes by sol-gel method and subsequent calcination treatment by using a polymer nanotube as a template and a carbon source, titanate as a titanium source Cable compound. Background technique [0002] In recent years, with the aggravation of environmental pollution and energy crisis, rechargeable secondary lithium-ion batteries are regarded as the most potential energy storage devices, which are used in power vehicles, hybrid vehicles, and energy storage of wind power and solar power. equipment etc. Undoubtedly, it is very important to prepare high-performance and safe electrode materials. At present, there are many problems and deficiencies in the commonly used carbon anode materials, such as serious first-time capacity attenuation, and potential safety hazards in high-power applications. An...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/10
Inventor 刘浪周慧娟贾殿赠
Owner XINJIANG UNIVERSITY
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