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A kind of carbon nanocomposite material and preparation method thereof

A composite material and carbon nanotechnology, which is applied in the manufacture of rayon, structural parts, textiles and paper, etc., can solve problems such as complex processing techniques, increased material costs, and large particle sizes of metal oxides and metals, and achieve wide sources of raw materials, The preparation method is simple and the composite material is stable

Active Publication Date: 2021-01-01
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the composite material in which the metal or metal oxide enters the interior of the carbon nanotube is more stable, but the metal or metal oxide enters the interior of the carbon nanotube or coats the metal nanoparticles or metal oxide that appear on the surface of graphene. treatment process
[0003] Electrospinning technology can wrap metal particles and oxide particles in carbon nanofibers, but the electrospinning device is relatively complicated and expensive, which affects the scale of materials and increases the cost of materials
Although cellulose can be directly swollen in the solution of metal oxide precursors and then carbonized to obtain metal or metal oxide / carbon composites, the metal oxide or metal particles obtained after carbonization are relatively large in size (for example, greater than 100 nanometers). ), and a large part of the metal or metal oxide particles are located outside the carbon material

Method used

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  • A kind of carbon nanocomposite material and preparation method thereof
  • A kind of carbon nanocomposite material and preparation method thereof
  • A kind of carbon nanocomposite material and preparation method thereof

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Experimental program
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preparation example Construction

[0031] figure 1 Is the preparation method flow chart in the embodiment of the present invention.

[0032] Such as figure 1 Shown, the preparation method of a kind of carbon nanocomposite provided by the present invention comprises the following steps:

[0033] Step 1, soaking cellulose microfibers in a precursor solution to swell to obtain swollen cellulose microfibers;

[0034] Step 2, put the swollen cellulose microfibers into the reaction solution, react the precursor with the reaction solution to obtain the reaction nitrogen-containing cellulose microfibers, and then put the cellulose microfibers absorbing the reaction nitrogen-containing cellulose microfibers into the nitrogen-containing Soaking in the solution, filtering and cleaning to obtain nitrogen-containing cellulose microfibers and drying the nitrogen-containing cellulose microfibers;

[0035] Step 3, preoxidizing nitrogen-containing cellulose microfibers in air to obtain preoxidized cellulose microfibers;

[...

Embodiment 1

[0057] In this embodiment, the precursor is SnCl 2 , the obtained carbon nanocomposite material is tin oxide / nitrogen-doped carbon nanocomposite fiber.

[0058] Soak 1g of cellulose microfibers in 0.2mol / L SnCl 2 50mL dimethylformamide (DMF) solution, stirred at 75°C for 40min to swell, then filtered the swollen cellulose microfibers and put them in water for 10min to make SnCl 2 hydrolyzing, taking out the cellulose microfibers and soaking them in 30% urea solution for 2 hours, filtering and cleaning the surface with deionized water to obtain nitrogen-containing cellulose microfibers, and freeze-drying the nitrogen-containing cellulose microfibers. The freeze-dried nitrogen-containing cellulose microfibers were pre-oxidized in air at 240°C for 8 hours, and then heated to 800°C in an argon atmosphere for carbonization for 5 hours to obtain tin oxide / nitrogen-doped carbon nanocomposite fibers. The size of tin particles is below 30nm.

[0059] Adopt X-ray powder diffractomete...

Embodiment 2

[0076] In this embodiment, the precursor is Fe(NO) 3 , the obtained carbon nanocomposite material is iron oxide / nitrogen-doped carbon nanocomposite fiber.

[0077] Soak 1g of cellulose microfiber in 0.2mol / L Fe(NO) 3 In 50mL DMF solution, stir at 75°C for 40min to swell, filter the swollen cellulose microfibers and put them in 5wt% ammonia water for 10min to make Fe(NO) 3 A metathesis reaction occurs, then the cellulose microfibers are taken out and soaked in 30% urea solution for 2 hours, after filtering and cleaning the surface with deionized water, the nitrogen-containing cellulose microfibers are obtained, and the nitrogen-containing cellulose microfibers are freeze-dried . The freeze-dried nitrogen-containing cellulose microfibers were pre-oxidized in air at 240° C. for 8 hours, and then heated to 800° C. for carbonization in an argon atmosphere for 5 hours to obtain iron oxide / nitrogen-doped carbon nanocomposite fibers.

[0078] Obtained iron oxide / nitrogen-doped carb...

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Abstract

The invention belongs to the field of material preparation, and provides a carbon nanocomposite and a preparation method thereof. The preparation method comprises the steps that a cellulose microfiberis firstly soaked in a precursor solution for swelling, then the swelled cellulose microfiber is put into a reaction solution, so that a precursor reacts with the reaction solution, and an obtained reaction product is absorbed by the cellulose microfiber; and then the cellulose microfiber is re-soaked in a nitrogen-containing solution to enable the cellulose microfiber to contain nitrogen, and after preoxidation and carbonization, a nitrogen-doped carbon nanocomposite is obtained. In the obtained carbon nanocomposite, the size of nanoparticles is small, and the nanoparticles are inside a carbon material; the nitrogen-doping operation carried out in the nitrogen-containing solution is beneficial to obtaining of smaller metal oxide particles which can be located inside a carbon fiber. The carbon nanocomposite obtained by the preparation method is assembled into lithium batteries as electrode materials, the stability of the lithium batteries can be greatly improved, and a good prospect in the application of energy storage and conversion is achieved.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a carbon nanocomposite material and a preparation method thereof. Background technique [0002] In lithium-ion battery electrode materials or catalytic materials, active materials (such as metals or metal oxides) are generally compounded with carbon materials in order to facilitate electron transport. Carbon nanomaterials such as graphene or carbon nanotubes are used to compound metal nanoparticles or metal oxides. The metal nanoparticles or metal oxide nanomaterials in the composite generally appear on the surface of carbon nanomaterials, thus affecting these materials. long-term stability and activity. The performance of the composite material in which the metal or metal oxide enters the interior of the carbon nanotube is more stable, but the metal or metal oxide enters the interior of the carbon nanotube or coats the metal nanoparticles or metal oxide that appe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/16D01F1/10H01M4/583H01M4/62H01M10/052
CPCD01F1/10D01F9/16H01M4/583H01M4/625H01M10/052Y02E60/10
Inventor 包志豪吴广明高国华
Owner TONGJI UNIV