Composite nano-material with carbon nano-sheets loaded with carbon nano-tubes in situ as well as preparation method and application of composite nano-material

A technology of composite nanomaterials and carbon nanosheets, which is applied in the field of composite nanomaterials and its preparation in which carbon nanosheets support carbon nanotubes in situ, can solve the problems of high cost and complicated preparation process, and achieve improved electrical conductivity and preparation process. Simple, stability-enhancing effects

Pending Publication Date: 2022-06-28
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a composite nanomaterial in which carbon nanosheets support carbon nanotubes in situ and its preparation method and application, which are used to overcome the defects of complicated preparation process and high cost in the prior art

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  • Composite nano-material with carbon nano-sheets loaded with carbon nano-tubes in situ as well as preparation method and application of composite nano-material
  • Composite nano-material with carbon nano-sheets loaded with carbon nano-tubes in situ as well as preparation method and application of composite nano-material

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preparation example Construction

[0020] The present invention provides a method for preparing a composite nanomaterial with carbon nanosheets supporting carbon nanotubes in situ, comprising the following steps:

[0021] S1: The organic sodium salt or organic acid potassium salt is ball-milled and mixed, and the ball-milled and mixed organic sodium salt or organic acid potassium salt is heat-treated under an inert atmosphere, and filtered, washed and dried after cooling to obtain porous carbon Nano flake powder.

[0022] Preferably, the organic sodium salt is at least one of sodium citrate, sodium ascorbate and sodium succinate; the organic acid potassium salt is at least one of potassium citrate, potassium ascorbate and potassium succinate; The selected organic sodium salt or organic acid potassium salt can be cracked into sodium carbonate or potassium carbonate crystal and coated carbon layer by heat treatment in a high temperature inert atmosphere, and the sodium carbonate or potassium carbonate crystal is ...

Embodiment 1

[0037] This embodiment provides a composite nanomaterial in which carbon nanotubes support carbon nanosheets in situ. The composite nanomaterial has a three-dimensional network porous structure and is composed of carbon nanotubes and carbon nanosheets. The carbon nanotubes are grown on the carbon nanosheets in situ. surface. The diameter of the carbon nanotube grown in situ is 10-50 nm, the length is 0.2-5 μm, and the thickness of the carbon nano-sheet is 7-20 nm.

[0038] The present invention also provides a method for preparing the above-mentioned composite nanomaterial of carbon nanotubes in situ supported carbon nanosheets, comprising the following steps:

[0039] (1) Put 60g of sodium citrate into a planetary ball mill for 5h at 450r / min, place it in a tube furnace and heat up to 700°C for 2h under a high-purity Ar atmosphere, filter, wash and dry after cooling to obtain a black three-dimensional Porous carbon nanosheet powder;

[0040] (2) 0.582g of cobalt nitrate was d...

Embodiment 2

[0046] This embodiment provides a composite nanomaterial in which carbon nanotubes support carbon nanosheets in situ. The composite nanomaterial has a three-dimensional network porous structure and is composed of carbon nanotubes and carbon nanosheets. The carbon nanotubes are grown on the carbon nanosheets in situ. surface. The diameter of the carbon nanotube grown in situ is 10-50 nm, the length is 0.2-5 μm, and the thickness of the carbon nano-sheet is 5-10 nm.

[0047] The present invention also provides a method for preparing the above-mentioned composite nanomaterial of carbon nanotubes in situ supported carbon nanosheets, comprising the following steps:

[0048] (1) Put 60g of potassium citrate into a planetary ball mill for 5h at 450r / min, place it in a tube furnace and heat up to 700°C for 2h under a high-purity Ar atmosphere, filter, wash and dry after cooling to obtain a black three-dimensional Porous carbon nanosheet powder;

[0049] (2) 0.582g of cobalt nitrate ...

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Abstract

The invention discloses a composite nano-material with carbon nano-sheets loaded with carbon nano-tubes in situ and a preparation method and application thereof.The preparation method comprises the steps that firstly, organic acid sodium salt or organic acid potassium salt serves as a raw material, and porous carbon nano-sheets are obtained through high-temperature heat treatment; dissolving an inorganic cobalt salt in an alcoholic solution, sequentially adding cyanamide micromolecules and porous carbon nanosheets, and carrying out mixing and ball milling to obtain a muddy mixed material; and finally, performing high-temperature carbonization treatment on the mixed material in an inert atmosphere, reducing cobalt ions into metal cobalt in the high-temperature inert atmosphere, loading the metal cobalt on the carbon nanosheets, and catalyzing cyanamide micromolecule high-temperature pyrolysis products by the metal cobalt to grow the carbon nanotubes in situ on the nanosheets. The raw materials adopted in the preparation method are low in price and easy to obtain, the preparation process is simple, and large-scale preparation can be achieved. The composite nano material has wide application prospects in new energy devices such as supercapacitors, lithium ion batteries, lithium-sulfur batteries, lithium-air batteries or fuel cells.

Description

technical field [0001] The invention relates to the technical field of nano carbon materials, in particular to a composite nano material with carbon nano sheets supporting carbon nano tubes in situ, and a preparation method and application thereof. Background technique [0002] Carbon nanomaterials have excellent mechanical, electrical, thermal, optical and other intrinsic physical properties, and their interface chemical properties can also be regulated by atomic doping, surface modification, and microstructure modification. Therefore, in supercapacitors, lithium-ion batteries, Lithium-sulfur batteries, lithium-air batteries, fuel cells and other new energy materials and devices are widely used. The multi-dimensional existence of carbon materials provides the possibility to construct a variety of nano-carbon-based hybrid materials. However, the existing nano-carbon materials have the defects of complicated preparation process and high cost. SUMMARY OF THE INVENTION [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C01B32/16H01G11/36H01M4/36H01M4/583H01M4/96B82Y40/00
CPCC01B32/15C01B32/16H01G11/36H01M4/362H01M4/583H01M4/96B82Y40/00C01B2202/22C01B2202/34C01B2202/36
Inventor 刘双科郝紫勋许静李宇杰郑春满孙巍巍
Owner NAT UNIV OF DEFENSE TECH
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