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Preparation method of carbon nano tube/polyaniline netty compound material

A technology of carbon nanotubes and composite materials, applied in the fields of fibrous fillers, chemical instruments and methods, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of short service life, small specific capacity, specific capacity and stability of composite materials Decrease and other issues, to achieve the effect of large specific capacity, increased specific surface area, and increased reactive points

Inactive Publication Date: 2010-03-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These phenomena will lead to a small specific capacity when the CNTs / PANI composite material is used as an electrode, and the specific capacity and stability of the composite material will decrease after multiple cycles. The cycle stability needs to be improved during the long-term charge and discharge process, and the service life is not long.

Method used

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  • Preparation method of carbon nano tube/polyaniline netty compound material
  • Preparation method of carbon nano tube/polyaniline netty compound material
  • Preparation method of carbon nano tube/polyaniline netty compound material

Examples

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Embodiment 1

[0034] A kind of embodiment of the present invention is, a kind of preparation method of carbon nanotube / polyaniline network composite material, and its concrete practice is:

[0035] A. Carboxylated carbon nanotubes

[0036] Weigh 0.25g of carbon nanotubes and dissolve them in 50mL of concentrated nitric acid, ultrasonically disperse for 15min, then heat and reflux at 80°C for 8h, let stand and cool, wash with distilled water, filter with suction, and dry in vacuum at 60°C for 24h to obtain carboxylated carbon nanotubes ;

[0037] B. Carbonyl chloride nanotubes

[0038] Dissolve 0.2 g of carboxylated carbon nanotubes in step A in 60 mL of thionyl chloride, add 2 mL of N,N-dimethylformamide (DMF), and react at 65°C for 24 hours to obtain a mixed solution; after the mixed solution is cooled to room temperature , washed with tetrahydrofuran and dried to obtain acyl chloride carbon nanotubes;

[0039] C. Amidated carbon nanotubes

[0040] The acyl chloride carbon nanotubes in s...

Embodiment 2

[0051] The method of this example is basically the same as that of Example 1, except that the reaction temperature and reaction time of step A carbon nanotube carboxylation are 25°C and 48h respectively; the reaction temperature of step B carbon nanotube acid chlorination and reaction time were 25°C and 48h, respectively; the reaction temperature and reaction time of step C carbon nanotube amidation were 40°C and 0.5h, respectively; the concentration of aniline in step D electrochemical deposition polymerization was 0.1mol L -1 At the same time, the method of applying voltage to the electrode during electrochemical deposition is a constant voltage method, and its voltage is constant at 1.2V; the working electrode is a nickel sheet; the CNTs / PANI mesh composite film electrodeposited on the nickel sheet is obtained, and the film is formed into a sheet shape, with a deposition thickness of about 1 cm.

Embodiment 3

[0053] The method of this example is basically the same as the production method of Example 1, the difference is only: the reaction temperature and reaction time of step A carboxylated carbon nanotubes are respectively 100 ℃ and 0.5h; The temperature and reaction time were 80°C and 0.5h, respectively; the reaction temperature and reaction time of the C-step amidation of carbon nanotubes were 20°C and 6h, respectively; the concentration of aniline in the D-step electrochemical deposition polymerization was 0.5mol L -1 , the method of applying voltage during electrochemical deposition is linear scanning method, and its voltage scanning range is -0.2~1.2V (scanning speed is 50mV s -1 ); the working electrode is metal aluminum; the electrolyte solution is a neutral electrolyte solution, and the prepared material is soaked in an acid solution before the capacity test. The electrodeposited CNTs / PANI mesh composite film on aluminum is obtained, and the film is fibrous, and the deposi...

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Abstract

The invention discloses a preparation method of carbon nano tube / polyaniline netty compound material, which comprises the steps of: A. implementing carboxylation of the carbon nano tube; B. implementing acyl chlorination of the carbon nano tube; C. implementing amidation of the carbon nano tube to obtain the carbon nano tube with positioned graft aniline monomer; and D. implementing electrochemical deposition and aggregation: preparing 200mL of aniline liquor with the concentration of 0.1 to 0.5 mol. L<-1>, adding the aniline liquor into an electrolyte liquor, then adding 0.12g of the mixed liquor of the carbon nano tube obtained in the step C, and then implementing electrochemical deposition to obtain the carbon nano tube / polyaniline netty compound material after nitrogen is introduced infor 30 min. When the carbon nano tube / polyaniline netty compound material prepared by using the method is used as an energy storage material, the specific capacity is large and the circulating stability is good; therefore, the carbon nano tube / polyaniline netty compound material is particularly applicable to preparing the electrode materials of energy storage components such as super capacitors,etc; and the method can easily prepare the carbon nano tube / polyaniline netty compound materials with different thicknesses and different layers.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube / polyaniline mesh composite material. Background technique [0002] Conductive polymer materials can be used as electrode energy storage materials for electrochemical supercapacitors. Polyaniline (PANI) is a conductive polymer material with excellent performance, which has the advantages of high electrical conductivity, good environmental stability, simple synthesis and cheap raw materials. [0003] Existing polyaniline composite materials are generally irregular particles, which have poor compactness, high resistance, and a tendency to tightly agglomerate between sheets or particles, leaving small gaps, so they have little effect on the infiltration of electrolyte and the process of charging and discharging. The intercalation / extraction of ions is relatively difficult, resulting in repeated extraction and intercalation of ions after multiple and long-term charge-discharge cycles, resul...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K9/02C08K9/04C08G73/02C09C1/44C09C3/00C09C3/06C09C3/08H01G9/058H01G11/32H01G11/86
CPCY02E60/13
Inventor 江奇赵晓锋周先礼赵勇
Owner SOUTHWEST JIAOTONG UNIV
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