Preparation method of carbon nanotube composite material

A composite material and carbon nanotube technology, applied in the direction of carbon nanotubes, filled carbon nanotubes, nanocarbons, etc., can solve the problems of uneven particle size of traditional catalysts, unstable composite material structure, and large consumption of carbon source gas. , to achieve the effect of improving the electrochemical reaction rate, improving the electrochemical performance of the material, and improving the electrical conductivity

Pending Publication Date: 2021-05-28
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defects of low specific capacitance of carbon nanotubes in the prior art, short cycle life due to unstable composite material structure, non-u

Method used

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  • Preparation method of carbon nanotube composite material
  • Preparation method of carbon nanotube composite material
  • Preparation method of carbon nanotube composite material

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Embodiment 1

[0024] A preparation method of carbon nanotube composite material, comprising the following steps:

[0025] (1) Preparation of nickel-based Prussian blue analogue precursor: preparation of solution Ⅰ: mix 1.8mmol nickel nitrate, 2.7mmol sodium citrate and 60mL deionized water as solution Ⅰ; step 2, prepare solution Ⅱ: prepare 1.2mmol Potassium hexacyanocobaltate (III) was dissolved in 60 mL of deionized water to obtain solution II; Step 3, the preparation of Prussian blue analogues: quickly pour solution I into solution II, magnetically stir for 1 min, let stand at room temperature for 24 h, and use Wash with deionized water and absolute ethanol three times, and dry at 70°C for 12 hours to obtain Ni-Co PBA powder, which is a Prussian blue analogue.

[0026] (2) Preparation of carbon nanotube composites: Spread Prussian blue analogue powder in a magnetic boat and place it in a tube furnace, and continuously feed nitrogen gas at a flow rate of 0.5 L min -1 , when the temperatur...

Embodiment 2

[0041] A preparation method of carbon nanotube composite material, comprising the following steps:

[0042] (1) Preparation of nickel-based Prussian blue analogue precursor: preparation of solution Ⅰ: mix 1.8mmol nickel nitrate, 2.7mmol sodium citrate and 60mL deionized water as solution Ⅰ; step 2, prepare solution Ⅱ: prepare 1.2mmol Potassium hexacyanocobaltate (III) was dissolved in 60 mL of deionized water to obtain solution II; step 3, the preparation of Prussian blue analogues: quickly pour solution I into solution II, stir magnetically for 1 min, let stand at room temperature for 20 h, and use Wash with deionized water and absolute ethanol three times, and dry at 60°C for 12 hours to obtain Ni-Co PBA powder, which is a Prussian blue analogue.

[0043] (2) Preparation of carbon nanotube composites: Spread Prussian blue analogue powder in a magnetic boat and place it in a tube furnace, and continuously feed nitrogen gas at a flow rate of 0.5 L min -1 , when the temperatur...

Embodiment 3

[0046] A preparation method of carbon nanotube composite material, comprising the following steps:

[0047] (1) Preparation of nickel-based Prussian blue analogue precursor: preparation of solution Ⅰ: mix 1.8mmol nickel nitrate, 2.7mmol sodium citrate and 60mL deionized water as solution Ⅰ; step 2, prepare solution Ⅱ: prepare 1.2mmol Potassium hexacyanocobaltate (III) was dissolved in 60 mL of deionized water to obtain solution II; an aqueous solution containing 1.2 mmol of potassium hexacyanocobaltate (III) and 60 mL of deionized water was obtained to obtain solution II; step 3, preparation of Prussian blue analogs : Pour solution Ⅰ into solution Ⅱ quickly, stir for 1min, let stand at room temperature for 24h, wash 3 times with deionized water and absolute ethanol, and dry at 80°C for 12h to obtain the Prussian blue analogue Ni- Co PBA powder.

[0048] (2) Preparation of carbon nanotube composites: Spread Prussian blue analogue powder in a magnetic boat and place it in a tub...

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Abstract

The invention discloses a preparation method of a carbon nanotube composite material, and belongs to the field of electrode material preparation, and the preparation method comprises the following steps: taking a nickel-based Prussian blue substance synthesized by a normal temperature precipitation method as a precursor, and then sequentially introducing nitrogen, nitrogen and hydrogen, nitrogen, nitrogen and propylene to carry out heat treatment on the precursor. The Prussian blue analogue precursor integrates a catalyst, a nitrogen source and part of a carbon source, and compared with a traditional catalyst for a carbon nanotube, the precursor has the advantages that the particle size is uniform, and the consumption of carbon source gas can be reduced; the transition metal can improve the specific capacitance of the carbon nano tube, the nitrogen doping can improve the conductivity of the carbon nano tube, and the carbon layer can play a structural protection role on the transition metal nano particles packaged in the carbon layer, so that the cycle life of the composite material is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a preparation method of a carbon nanotube composite material. Background technique [0002] As a carbon nanomaterial with high conductivity and high mechanical properties, carbon nanotubes play a very important role in the application of supercapacitor electrode materials, and its energy storage mechanism is electric double layer energy storage, resulting in low specific capacitance and energy density. . Therefore, carbon nanotubes are often combined with electrode materials with a Faraday energy storage mechanism, such as transition metal oxides, hydroxides, transition metals, etc., and the current composite electrode materials are mostly electrode materials with a Faraday energy storage mechanism coated on carbon. On the surface of nanotubes, electrode materials with Faraday energy storage mechanism are prone to structural collapse, deformati...

Claims

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Application Information

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IPC IPC(8): C01B32/16C01B32/168C01B32/178H01G11/36H01G11/24
CPCC01B2202/10C01B2202/22C01B32/16C01B32/168C01B32/178H01G11/24H01G11/36
Inventor 何燕高江姗刘治明徐瑾唐元政
Owner QINGDAO UNIV OF SCI & TECH
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