Preparation method of active carbon nanotube/ferric oxide lithium ion battery electrode material

A lithium iron oxide, carbon nanotube technology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, can solve the complex process, limit the development and application of carbon nanotubes/iron oxide, and poor binding ability between iron oxide and carbon nanotubes and other problems, to achieve the effect of simple process, low cost, and improved bonding performance

Inactive Publication Date: 2013-04-03
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of traditional carbon nanotube / iron oxide hybrid materials has disadvantages such as complicated process and poor binding ability between iron oxide and carbon nanotubes. The existence of the above problems affects and limits the further development and application of carbon nanotubes / iron oxide. Nanotechnology, as an emerging discipline, advocates the manufacture and application of nanomaterials to be environmentally friendly. This patent proposes a simple and fast green carbon nanotube / iron oxide synthesis method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 1.0 g of dried unpurified carbon nanotube raw sample powder, mix and grind it with potassium hydroxide at a mass ratio of 1:0; heat up to a reaction temperature of 750 °C at a rate of 15 °C / min in a quartz tube furnace , the flow rate of argon gas is 8L / h, the reaction time is 1 hour, the temperature is taken out, and then the carbon nanotubes are repeatedly rinsed with deionized water, and the carbon nanotubes are filtered until the pH value of the solution reaches 7; the obtained activated carbon nanotubes are dispersed in alcohol and dried in a vacuum drying oven at 120° C. to obtain an activated carbon nanotube adsorption material with good water solubility. The modified magnetic carbon nanotube sample is filtered, washed with water, and vacuum-dried to obtain the iron oxide / carbon nanotube lithium ion electrode material. Disperse iron oxide / carbon nanotubes (80%), acetylene black (10%) and polyvinylidene fluoride (10%) in methylpyrrolidone solution, mix well,...

Embodiment 2

[0017] Weigh 1.0 g of dried unpurified carbon nanotube raw sample powder, mix and grind it with potassium hydroxide at a mass ratio of 1:1; heat up to a reaction temperature of 750 °C at a rate of 15 °C / min in a quartz tube furnace , the flow rate of argon gas is 8L / h, the reaction time is 1 hour, the temperature is taken out, and then the carbon nanotubes are repeatedly rinsed with deionized water, and the carbon nanotubes are filtered until the pH value of the solution reaches 7; the obtained activated carbon nanotubes are dispersed in alcohol and dried in a vacuum drying oven at 120° C. to obtain an activated carbon nanotube adsorption material with good water solubility. The modified magnetic carbon nanotube sample is filtered, washed with water, and vacuum-dried to obtain the iron oxide / carbon nanotube lithium ion electrode material. Disperse iron oxide / carbon nanotubes (80%), acetylene black (10%) and polyvinylidene fluoride (10%) in methylpyrrolidone solution, mix well,...

Embodiment 3

[0019] Weigh 1.0 g of dried unpurified carbon nanotube raw sample powder, mix and grind it with potassium hydroxide at a mass ratio of 1:2; heat up to a reaction temperature of 750 °C at a rate of 15 °C / min in a quartz tube furnace , the flow rate of argon gas is 8L / h, the reaction time is 1 hour, the temperature is taken out, and then the carbon nanotubes are repeatedly rinsed with deionized water, and the carbon nanotubes are filtered until the pH value of the solution reaches 7; the obtained activated carbon nanotubes are dispersed in alcohol and dried in a vacuum drying oven at 120° C. to obtain an activated carbon nanotube adsorption material with good water solubility. The modified magnetic carbon nanotube sample is filtered, washed with water, and vacuum-dried to obtain the iron oxide / carbon nanotube lithium ion electrode material. Disperse iron oxide / carbon nanotubes (80%), acetylene black (10%) and polyvinylidene fluoride (10%) in methylpyrrolidone solution, mix well,...

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Abstract

The invention belongs to the technical field of energy nano new function materials, and particularly relates to a preparation method of an active carbon nanotube / the ferric oxide lithium ion battery electrode material. The method specifically comprises the following steps: mixing the unpurified original samples of the carbon nanotube with the powder of potassium hydroxide or sodium hydroxide, and grinding uniformly; placing the materials in a reaction container, and introducing inert gases to carry out a reaction, then heating to a certain temperature, and adjusting the carrier gas; and carrying out the reaction continuously for hours, then filtering, rinsing and vacuum-drying the reaction products to obtain the active carbon nanotube / the ferric oxide hybridization material. In the invention, solid-phase oxidizing agent is adopted to modify the surface structure of the original carbon nanotube, the specific surface area of the carbon nanotube is improved obviously, simultaneously, ferric nanoparticles are directly oxidized into ferric oxide, the active carbon nanotube / the ferric oxide lithium ion battery electrode material is directly prepared through the one-step method. In addition, according to the invention, the raw materials are simple and easily obtainable, preparation technology is simple, the conditions are easy to control, the cost is low, and is suitable for continuous, large-scale and batch production.

Description

technical field [0001] The invention belongs to the technical field of energy nano new functional materials, and in particular relates to a preparation method of an activated carbon nanotube / iron oxide lithium-ion battery electrode material. The method realizes the improvement of the specific surface area of ​​the activated carbon nanotube in one step and simultaneously realizes the magnetic iron oxide The modification on the surface of carbon nanotubes has better battery performance when applied to lithium-ion batteries. Background technique [0002] Due to the advantages of high voltage, high capacity and high energy, long cycle life and good safety performance, lithium-ion batteries have broad application prospects in portable electronic devices, electric vehicles, space technology, defense industry, etc. It has been a research hotspot that has attracted wide attention in recent years. A lithium-ion battery is a rechargeable battery that primarily relies on the movement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1393H01M4/1391B82Y30/00
CPCY02E60/10
Inventor 马杰陈君红杨明轩李程范海波李强
Owner TONGJI UNIV
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