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Preparation method of carbon nanotube composite material

A carbon nanotube and composite material technology, which is applied in the field of carbon nanotube composite material preparation, can solve the problems of poor cycle life, unstable composite material structure, low specific capacitance, etc.

Pending Publication Date: 2021-05-18
QINGDAO UNIV OF SCI & TECH
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  • 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, poor cycle life due to unstable structure of composite materials, non-uniform particle size of traditional catalysts, large consumption of carbon source gas, etc., the present invention provides a carbon nanotube composite material. Preparation

Method used

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  • Preparation method of carbon nanotube composite material

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Embodiment 1

[0022] A preparation method of carbon nanotube composite material, comprising the following steps:

[0023] (1) Preparation of nickel-based Prussian blue analogs as precursors by normal temperature precipitation method, including the following steps: Step 1, preparation of solution I: mix 1.8mmol nickel nitrate, 2.7mmol sodium citrate and 60mL deionized water as solution I; Step 2, preparation of solution II: dissolving 1.2 mmol potassium cobaltcyanide in 60 mL of deionized water to obtain solution II; step 3, preparation of nickel-based Prussian blue analogues: quickly pour solution I into solution II, and magnetically stir for 1 min, Stand at room temperature for 24 hours, wash with deionized water and absolute ethanol three times, and dry at 70°C for 12 hours to obtain nickel-based Prussian blue analogue powder;

[0024] (2) The preparation method of carbon nanotube-encapsulated metal particles comprises the following steps: step 1, spreading the nickel-based Prussian blue ...

Embodiment 2

[0027] A preparation method of carbon nanotube composite material, comprising the following steps:

[0028] (1) Preparation of nickel-based Prussian blue analogs as precursors by normal temperature precipitation method, including the following steps: Step 1, preparation of solution I: mix 1.8mmol nickel nitrate, 2.7mmol sodium citrate and 60mL deionized water as solution I; Step 2, preparation of solution II: dissolving 1.2 mmol potassium ferricyanide in 60 mL of deionized water to obtain solution II; step 3, preparation of nickel-based Prussian blue analogues: quickly pour solution I into solution II, and magnetically stir for 1 min. Stand at room temperature for 20 hours, wash with deionized water and absolute ethanol three times, and dry at 60°C for 12 hours to obtain nickel-based Prussian blue analogue powder;

[0029] (2) The preparation method of carbon nanotube-encapsulated metal particles comprises the following steps: step 1, spreading the nickel-based Prussian blue a...

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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, and finally, reacting in a sodium sulfide solution by adopting a hydrothermal method to obtain the composite material of the carbon nanotube encapsulated metal sulfide. The nickel-based 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 particle size is uniform, and the consumption of carbon source gas can be reduced; the transition metal sulfide can improve the specific capacitance of the carbon nanotube, and the carbon layer can play a structural protection role on the transition metal sulfide 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, sulfides, etc., and the current composite electrode materials are mostly electrode materials with a Faraday energy storage mechanism coated on the surface of carbon nanotubes. However, when the electrode material of the Faraday energy storage mechanism undergoes redox reactions during continuous charg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/30H01G11/36C01B32/168
CPCH01G11/86H01G11/24H01G11/26H01G11/30H01G11/36C01B32/168C01P2004/03
Inventor 何燕高江姗王欢欢周杨林艳李慧芳
Owner QINGDAO UNIV OF SCI & TECH
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