Method for preparing coaxially-composite nano material by using carbon nano tube as core

A technology of composite nanomaterials and carbon nanotubes, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor electrical conductivity and poor cycle performance, and achieve improved electrical conductivity and convenient operation. , the effect of improving structural stability

Inactive Publication Date: 2014-03-12
FUZHOU UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to directly address the problems of low capacity of carbon materials, poor conductivity and poor cycle performance of manganese-based materials, and provide a carbon nanotube as the core to prepare high specific surface area, high conductivity, high capacity, material composition A flexible and controllable one-dimensional composite nanotube method, the present invention uses c

Method used

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  • Method for preparing coaxially-composite nano material by using carbon nano tube as core
  • Method for preparing coaxially-composite nano material by using carbon nano tube as core
  • Method for preparing coaxially-composite nano material by using carbon nano tube as core

Examples

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Example Embodiment

[0025] Example 1

[0026] Step 1) Disperse 0.5 g of carbon nanotubes into a 1:3 volume ratio of hydrochloric acid and sulfuric acid mixed solution, and treat them in an oil bath at 100°C for 1 hour, then suction and filter them, wash them with ethanol and deionized water, and transfer to Dry for 2 hours in a drying oven at 50°C to obtain pure carbon nanotubes; figure 1 Schematic diagram of the structure of carbon nanotubes (CNTs);

[0027] Step 2) Weigh 0.3g of acidified carbon nanotubes and 0.6g of manganese acetate into 20ml and 80ml absolute ethanol solutions under ultrasonic conditions, and ultrasonically treat them for 1h, then drop the manganese acetate organic solution into the carbon nanotubes. In the organic solution, an organic mixed solution of manganese acetate / carbon nanotubes is obtained;

[0028] Step 3): After vigorously stirring the above-mentioned manganese acetate / carbon nanotube organic mixed solution for 3 hours, it is filtered, washed with ethanol and deionize...

Example Embodiment

[0030] Example 2

[0031] Step 1) Disperse 0.5 g of carbon nanotubes into a 1:3 volume ratio of hydrochloric acid and nitric acid mixed solution, treat them in an oil bath at 110°C for 1.5 hours, then perform suction filtration, wash with ethanol and deionized water, and transfer Dry in a drying oven at 60°C for 2 hours to obtain pure carbon nanotubes; figure 1 Schematic diagram of the structure of carbon nanotubes (CNTs);

[0032] Step 2) Weigh 0.3g of acidified carbon nanotubes and 1.2g of manganese acetate into 20ml and 100ml absolute ethanol solutions under ultrasonic conditions, and ultrasonically treat them for 2h, then drop the manganese acetate organic solution into the carbon nanotubes. In the organic solution, an organic mixed solution of manganese acetate / carbon nanotubes is obtained;

[0033] Step 3): After vigorously stirring the above-mentioned manganese acetate / carbon nanotube organic mixed solution for 6 hours, it is suction filtered, washed with ethanol and deioniz...

Example Embodiment

[0035] Example 3

[0036] Step 1) Disperse 0.5 g of carbon nanotubes into a mixture solution of sulfuric acid and hydrochloric acid with a volume ratio of 3:1, treat them in an oil bath at 120°C for 2 hours, then perform suction filtration, wash them with ethanol and deionized water, and transfer to Dry for 4 hours in a drying oven at 50°C to obtain pure carbon nanotubes; figure 1 Is a schematic diagram of the structure of carbon nanotubes (CNTs), where 1 is carbon nanotubes;

[0037] Step 2) Weigh 0.3g of acidified carbon nanotubes and 1.8g of manganese acetate into 20ml, 90ml absolute ethanol solution under ultrasonic conditions, ultrasonic treatment for 2h, and then drop the manganese acetate organic solution into the carbon nanotubes. In the organic solution, an organic mixed solution of manganese acetate / carbon nanotubes is obtained;

[0038] Step 3): After vigorously stirring the above-mentioned manganese acetate / carbon nanotube organic mixed solution for 9 hours, it is suct...

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Abstract

The invention discloses a method for preparing a coaxially-composite nano material by using a carbon nano tube as a core. The composite nano material using the carbon nano tube as the core comprises the carbon nano tube, manganese oxide, and amorphous carbon from the inside to the outside in sequence, that is to say, the amorphous carbon/manganese oxides/the carbon nano tube (C/MnOx/CNTs) coaxially compound the nano material, wherein the manganese oxides are MnO2, Mn3O4 and MnO, and are abbreviated to MnOx. The method uses the carbon nano tube as the core to prepare the one-dimensional amorphous carbon/manganese oxides/the carbon nano tube (C/MnOx/CNTs) coaxially-compounded nano material, so that the preparation technology is simple, the device requirement is low, and the prepared material is large in specific surface area, and high in stability, capacity and conductivity, and has huge application potentiality in the field of lithium secondary battery negative electrode materials.

Description

technical field [0001] The invention belongs to the field of new energy nanomaterials, in particular to an oxide / carbon nanotube (C / MnO x / CNTs) coaxial composite nanomaterials method. Background technique [0002] With the increasing depletion of irreversible energy, the research of lithium-ion batteries has played an increasingly important role in the field of new energy. Lithium-ion battery anode materials are an important part of lithium-ion batteries, and their research is also one of the key factors determining the performance of lithium-ion batteries. However, the traditional carbon material has a capacity of only 372mAh / g, which is far from meeting the needs of the contemporary society for the practical application of high-performance lithium batteries. Therefore, in recent years, experts at home and abroad have been working on the research of lithium-ion battery anode materials with high capacity, high cycle performance, high stability, economical and environmenta...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/50H01M4/62B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/50H01M4/587H01M4/62H01M4/625Y02E60/10
Inventor 杨尊先郭太良庞海东严文焕吕军胡海龙徐胜
Owner FUZHOU UNIVERSITY
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