CuO-carbon nano-tube composite micro-nano-sphere, preparation and uses thereof

A carbon nanotube composite, carbon nanotube technology, applied in chemical instruments and methods, electrode manufacturing, electrical components and other directions, can solve problems affecting application, affecting cyclability, etc., to achieve convenient operation, improve cycle performance, and low energy consumption Effect

Active Publication Date: 2009-05-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a lithium-ion battery anode material, and other oxides, although copper oxide has a high theoretical specific capacity, there is a large volume change in the process of lithium storage, and the volume shrinkage and expansion during charging and discharging cause great stress. , making the material itself pulverized and affecting its cycle performance, which in turn affects its application in lithium-ion batteries

Method used

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  • CuO-carbon nano-tube composite micro-nano-sphere, preparation and uses thereof
  • CuO-carbon nano-tube composite micro-nano-sphere, preparation and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. Preparation of CuO-carbon nanotube composite micro-nanospheres

[0027] Weigh 20 mg of purified carbon nanotubes, add 5 ml of N,N-dimethylformamide, and ultrasonically disperse for 5 hours. 1.208 g of copper nitrate and 1 g of polyoxyethylene-polyoxypropylene-polyoxyethylene P123 were dissolved in 40 ml of water with constant stirring to form a blue solution. Then, the dispersed carbon nanotubes were added into the solution, and then ultrasonicated for 2 hours to ensure that the carbon nanotubes were uniformly dispersed. Add 5 ml of 25wt% ammonia water, stir for 1 hour, reflux at 110°C for 2 hours under strong stirring, centrifuge the resulting mixture solution, wash with water, and the obtained precipitate is the CuO-carbon nanotube composite micro-nano ball.

Embodiment 2

[0028] Example 2, preparation of CuO-carbon nanotube composite micro-nanospheres

[0029] Weigh 50 mg of purified carbon nanotubes, add 5 ml of N,N-dimethylformamide, and ultrasonically disperse for 5 hours. 1.95 g of copper nitrate and 1 g of polyoxyethylene-polyoxypropylene-polyoxyethylene P123 were dissolved in 40 ml of water with constant stirring to form a blue solution. Then, the dispersed carbon nanotubes were added into the solution, and then ultrasonicated for 2 hours to ensure that the carbon nanotubes were uniformly dispersed. Add 15 ml of 25wt% ammonia water, stir for 1 hour, reflux at 130°C for 2 hours under strong stirring, centrifuge the resulting mixture solution, wash with water, and the precipitate obtained is the CuO-carbon nanotube composite micro-nano ball.

[0030] figure 1 It is an electron micrograph of the obtained CuO-carbon nanotube composite micro-nanosphere. It can be seen from the figure that CuO and carbon nanotube form a uniform composite mic...

Embodiment 3

[0031] Example 3, Electrical performance test of CuO-carbon nanotube composite micro-nanosphere

[0032] Taking CuO micro-nanospheres as a comparison, the preparation process of CuO micro-nanospheres is as follows:

[0033] 1.208 g of copper nitrate and 1 g of polyoxyethylene-polyoxypropylene-polyoxyethylene P123 were dissolved in 40 ml of water with constant stirring to form a blue solution. Subsequently, 10 milliliters of 25 wt % ammonia water was added, and the solution turned dark blue. Then, the solution was refluxed at 110° C. for 2 hours under strong stirring, and the solution turned black. The obtained mixture solution was centrifuged, washed with water, and the obtained precipitate was the CuO micro-nanosphere of the present invention.

[0034] Electrochemical characterization of CuO micro-nanospheres and CuO-carbon nanotube composite micro-nanospheres: the electrochemical characterization was performed using a coin cell Li|1M LiPF6 (EC:DMC=1:1)|CuO / CuO-carbon nanotu...

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Abstract

The invention discloses a CuO-carbon nano tube composite macro-nano ball, a preparation method thereof and application of the CuO-carbon nano tube composite macro-nano ball. The method for preparing the CuO-carbon nano tube composite macro-nano ball comprises the following steps: 1) a surfactant and cupric salt are dissolved to be prepared into a reactant solution A; 2) a carbon nano tube is dispersed into N, N-dimethyl formamide to obtain a reaction solution B; 3) the reaction solution B is added into the reactant solution A, and dispersed to obtain a dispersed solution C; and 4) the dispersed solution C is added with ammonia and subjected to heating reflux reaction to obtain the CuO-carbon nano tube composite macro-nano ball. The method takes the surfactant such as polyoxyethylene-polyoxypropylene-polyoxyethylene as a structure-directing agent, adopts a simple solution reflux method for one-step synthesis to obtain the CuO-carbon nano tube composite macro-nano ball. The used preparation raw materials are simple and have wide sources; and the preparation method is simple and economic, has low energy consumption and is convenient to operate, and can realize large-scale synthesis of the CuO-carbon nano tube composite macro-nano ball.

Description

technical field [0001] The invention relates to a CuO-carbon nanotube composite micro-nanosphere and its preparation method and application, in particular to its application as an anode material of a lithium ion battery. Background technique [0002] Materials, energy and information are the backbone of modern society and the main concerns of the new century. The development of new materials may become a new economic growth point, which determines or affects the development of an industry to a large extent. [0003] In the past ten years, inorganic or organic layer nano / micro structures with fixed morphology not only have great potential application prospects in electronics, optics, mechanics and other devices, but also have great potential applications in chemistry, physics due to their unique properties. Basic research in the fields of electronics, optics, materials science and biological science has far-reaching significance. Another frontier of such structural material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622B01J13/00H01M4/58H01M4/04
CPCY02E60/12Y02E60/10
Inventor 万立骏郑书发胡劲松
Owner INST OF CHEM CHINESE ACAD OF SCI
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