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Low-contact-resistance silver modified polyaniline/carbon nanotube/cotton fabric composite flexile electrode and preparation method therefor

A technology of low contact resistance and carbon nanotubes, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, electrolytic capacitors, etc., can solve the problems of poor electrical conductivity and high contact resistance, and achieve excellent electrochemical performance. The effect of low resistance and good application prospects

Inactive Publication Date: 2017-09-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In previous studies, it was found that the polyaniline / carbon nanotube / cotton flexible electrode prepared by combining the three has high specific capacitance and good cycle stability, but the contact resistance is high and the conductivity still needs to be improved.

Method used

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  • Low-contact-resistance silver modified polyaniline/carbon nanotube/cotton fabric composite flexile electrode and preparation method therefor
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  • Low-contact-resistance silver modified polyaniline/carbon nanotube/cotton fabric composite flexile electrode and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of carbon nanotube solution:

[0035] Add carboxylated carbon nanotubes to deionized water, then add sodium dodecylbenzenesulfonate (total ratio of carbon nanotubes is 1:1), stir, ultrasonic 1h, and finally use a homogenizer to disperse, A carbon nanotube dispersion was obtained.

[0036] (2) Preparation of carbon nanotube / cotton composite:

[0037] Put the cotton fabric and the prepared carbon nanotube solution in an infrared proofer for treatment. The treatment condition is to raise the temperature from 5°C / min to 135°C for 70 minutes; then take it out and dry it in an oven at 100°C; to dry.

[0038] (3) Preparation of silver-modified polyaniline / carbon nanotube / cotton composite:

[0039] Soak 0.5g carbon nanotube / cotton composite in 100mL mixed solution containing 0.5mol / L hydrochloric acid, 0.25mol / L aniline and 2g silver nitrate for 30min, then add 40mL 0.25mol / L ammonium persulfate solution, at room temperature Polymerization 2h. After the pol...

Embodiment 2～5

[0041] The operation process is the same as in Example 1, but the polymerization time is respectively 4h (Example 2), 6h (Example 3), 8h (Example 4), and 10h (Example 5).

[0042] In the above examples, carbon nanotubes were purchased from Beijing Boyu Co., Ltd., and the performance parameters are shown in Table 1. All other reagents used were of analytical grade and no further purification was required during use. The infrared proofing machine was purchased from Suzhou Starle Printing and Dyeing Machinery Co., Ltd., and the instrument model was DL-6000Plus (Starle-3). The electrochemical workstation CHI660E of Shanghai Chenhua Instrument Co., Ltd. was used to test the impedance.

[0043] Table 1 Performance parameters of carbon nanotubes

[0044]

[0045] figure 1 and figure 2 It is the AC impedance map of each example. The AC impedance map is divided into high-frequency area and low-frequency area. The front semicircle figure is the high-frequency area, and its inte...

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Abstract

The invention relates to a low-contact-resistance silver modified polyaniline / carbon nanotube / cotton fabric composite flexile electrode and a preparation method therefor. The composite flexile electrode takes cotton fabrics as a flexible base material, takes carbon nanotubes and polyaniline as active materials, and takes silver particles for modification to obtain the composite flexile electrode. In a high-temperature and high-voltage condition, high-density accumulation of the carbon nanotubes on the cotton fabrics is promoted by adopting an impregnation method; and finally, preparation of silver ion-doped and chemically-plated polyaniline is performed so as to obtain the high-performance flexile electrode material. The flexile electrode prepared by the method is soft and high in efficiency; the shortcoming of high contact resistance of the conventional fabric base materials is overcome; and all materials used in the experience process are commercial products, so that preparation feasibility and industrialization are greatly improved, thereby achieving a quite high application prospect.

Description

technical field [0001] The invention belongs to the field of flexible electrode materials and preparation thereof, in particular to a silver-modified polyaniline / carbon nanotube / cotton fabric composite flexible electrode with low contact resistance and a preparation method thereof. Background technique [0002] With the development of society, flexible energy storage devices have gradually attracted people's attention due to their characteristics of easy folding, lightness and thinness, among which flexible supercapacitors have become a research hotspot. Flexible supercapacitors are composed of flexible electrodes, current collectors, and separators. Flexible electrodes are its core structure, but traditional electrode fabrication methods are difficult to meet the application of flexible electrodes. This is because the electrode prepared by the traditional method is in the form of powder, and it needs to be assembled into an electrode sheet with the help of a binder. The uti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22H01G11/30H01G11/36H01G11/48H01G11/86
CPCY02E60/13H01G11/36H01G11/22H01G11/30H01G11/48H01G11/86
Inventor 郝天琪俞丹王炜
Owner DONGHUA UNIV