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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 carbon nanotubes as the core to prepare amorphous carbon / manganese oxide / carbon nanotubes (C / MnO x / CNTs) coaxial composite nanomaterials, the preparation process is simple, the equipment requirements are low, the prepared materials have the advantages of large specific surface area, good conductivity, high capacity, etc., and have great application potential in the field of lithium secondary battery electrode anode materials

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

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Effect test

Embodiment 1

[0026] Step 1) Disperse 0.5g of carbon nanotubes into a mixed solution of hydrochloric acid and sulfuric acid with a volume ratio of 1:3, treat it in an oil bath at 100°C for 1 hour, then filter it with suction, wash it with ethanol and deionized water in sequence, and transfer it to Dry in a drying oven at 50°C for 2 hours 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 and disperse them into 20ml and 80ml of absolute ethanol solution under ultrasonic conditions, ultrasonically treat for 1h, and then add manganese acetate organic solution drop by drop into carbon nanotubes. In the tube organic solution, promptly obtain manganese acetate / carbon nanotube organic mixed solution;

[0028] Step 3): Stir the above manganese acetate / carbon nanotube organic mixed solution vigorously for 3 hours, perform suction filtration, wash with ethanol...

Embodiment 2

[0031] Step 1) Disperse 0.5g of carbon nanotubes into a mixed solution of hydrochloric acid and nitric acid with a volume ratio of 1:3, treat it in an oil bath at 110°C for 1.5h, then filter it with suction, wash with ethanol and deionized water in sequence, 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 and disperse them into 20ml and 100ml of absolute ethanol solution respectively under ultrasonic conditions, ultrasonically treat for 2 hours, and then drop the manganese acetate organic solution into the carbon nanotubes drop by drop. In the tube organic solution, promptly obtain manganese acetate / carbon nanotube organic mixed solution;

[0033] Step 3): Stir the above-mentioned manganese acetate / carbon nanotube organic mixed solution vigorously for 6 hours, perform suction filt...

Embodiment 3

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

[0037] Step 2) Weigh 0.3g of acidified carbon nanotubes and 1.8g of manganese acetate and disperse them into 20ml and 90ml of absolute ethanol solution under ultrasonic conditions, ultrasonically treat for 2h, and then add manganese acetate organic solution dropwise into carbon nanotubes In the organic solution, obtain manganese acetate / carbon nanotube organic mixed solution;

[0038] Step 3): Stir the above-mentioned manganese acetate / carbon nanotube organic mixed solution vigorously for 9 hours, perform suction...

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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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