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Method for preparing polyaniline-titanium dioxide nanotube array composite electrode in one step

A nanotube array and titanium dioxide technology, applied in the field of electrochemistry, can solve the problems of excessive waste liquid, weak binding force, and small diameter of nanotubes, and achieve the effects of shortening the process flow, improving the bonding strength, and increasing the contact area

Active Publication Date: 2020-05-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These methods firstly prepare titanium dioxide nanotube arrays by anodic oxidation, and then use different methods and processes to deposit polyaniline into titanium dioxide nanotube arrays to prepare polyaniline-titanium dioxide nanotube array composite electrodes. The preparation process of composite electrodes is compared It is complex and produces a lot of waste liquid; due to the interfacial tension between titanium oxide and aniline and polyaniline, the diameter of the nanotube is small, and the inside of the nanotube cannot be completely infiltrated by the monomer solution, so it is difficult for the generated polyaniline to fully cover the nanotube The inner surface of the polyaniline and titanium oxide is weak, resulting in low cycling stability of the composite electrode.

Method used

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  • Method for preparing polyaniline-titanium dioxide nanotube array composite electrode in one step
  • Method for preparing polyaniline-titanium dioxide nanotube array composite electrode in one step
  • Method for preparing polyaniline-titanium dioxide nanotube array composite electrode in one step

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Mix 20 g of ethanol, 10 g of water and 70 g of ethylene glycol, add 0.3 g of ammonium fluoride, 3 g of aniline and 3 g of concentrated sulfuric acid (98% by mass, the same as in the following examples), stir and dissolve to obtain a mixed solution. The mixed solution is used as the electrolyte, the metal titanium sheet (99% of purity) is used as the anode, the platinum sheet (99.99% of the purity) is used as the cathode, the distance between the anode and the cathode is 2cm, and the anodic oxidation is carried out at 5°C and 40V for 3 Hour. After the reaction is finished, the electrolyzed anode sheet is washed with deionized water and dried to obtain the polyaniline-titanium dioxide nanotube array composite electrode.

[0024] Depend on figure 1 It can be seen that the prepared polyaniline-titanium dioxide nanotube array composite electrode is composed of titanium dioxide and polyaniline. On the tube wall of the tube, the two are tightly combined.

[0025] The electr...

Embodiment 2

[0027] Mix 10g of ethanol, 20g of water and 70g of ethylene glycol together, add 0.4g of ammonium fluoride, 2g of aniline and 2g of concentrated sulfuric acid, stir and dissolve to obtain a mixed solution. The mixed solution was used as the electrolyte, the metal titanium sheet was used as the anode, and the platinum sheet was used as the cathode. The distance between the anode and the cathode was 2 cm, and anodized at 3°C ​​and 30V for 4 hours. After the reaction, the sample was washed with deionized water and dried to obtain a polyaniline-titanium dioxide nanotube array composite electrode, whose performance was similar to that of Example 1.

Embodiment 3

[0029] Mix 40g of ethanol, 1g of water and 59g of ethylene glycol together, add 0.5g of ammonium fluoride, 5g of aniline and 5g of concentrated sulfuric acid, stir and dissolve to obtain a mixed solution. Using this mixed solution as the electrolyte, the metal titanium sheet as the anode, and the platinum sheet as the cathode, the distance between the anode and the cathode is 2 cm, and anodized at 0°C and 50V for 1 hour. After the reaction, the sample was washed with deionized water and dried to obtain a polyaniline-titanium dioxide nanotube array composite electrode, whose performance was similar to that of Example 1.

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Abstract

The invention relates to a one-step preparation method of polyaniline-titanium dioxide nanotube array composite electrode. The method comprises the following steps of: adding ammonium fluoride, aniline and concentrated sulfuric acid into a mixed solvent, stirring and dissolving to obtain a mixed solution; Using this mixed solution as electrolyte, metal titanium plate as anode and platinum plate ascathode,anoding at 0-10 DEG C, 20-50V for 1-5 hour. The oxidized anode plate is washed with deionized water and dried to obtain polyaniline. TiO2 nanotube array composite electrode. The invention greatly simplifies the process steps, shortens the process flow and obtains excellent electrode performance.

Description

Technical field: [0001] The invention belongs to the field of electrochemistry, in particular to a preparation method of a polyaniline-titanium dioxide nanotube array composite electrode. Background technique: [0002] Electric energy is the most important energy in the world today. Supercapacitor is a kind of electric energy storage device. It has the advantages of high power capacity, fast energy storage and long service life. It is used in new energy vehicles, aerospace, urban rail transit, solar energy systems It has important applications in smart grid and military equipment. [0003] The composition, morphology, and preparation method of electrodes have a great influence on the performance of supercapacitors. Therefore, the preparation of electrodes for supercapacitors has received extensive attention. In order to obtain electrodes with better performance, people use different methods to combine two or more materials together to prepare many composite electrodes to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/46H01G11/48B82Y30/00
CPCB82Y30/00H01G11/30H01G11/46H01G11/48H01G11/86Y02E60/13
Inventor 赵建玲肖甜甜王西新李子庆王晓柳
Owner HEBEI UNIV OF TECH
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