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Titanium dioxide nanotube/polyaniline composite electrode, preparation and application thereof

A technology of titanium dioxide and composite electrodes, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of poor electrochemical stability, achieve improved conductivity, good conductivity, and increased reactive sites Effect

Inactive Publication Date: 2015-12-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Polyaniline (PANI) has high capacitance, but poor electrochemical stability during charge and discharge

Method used

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  • Titanium dioxide nanotube/polyaniline composite electrode, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of titanium dioxide nanotubes by anodic oxidation method:

[0027] Use a high-purity titanium sheet with a size of 13×10mm, a thickness of 1mm, and a purity of 99.99% as the substrate. Before oxidation, the titanium sheet is mechanically polished with 600 mesh and 1500 mesh sandpaper, and then 1wt% HF and 3wt% HNO 3 Aqueous solution is used for chemical polishing; the polished titanium sheet is used as the working electrode, and the platinum electrode is used as the counter electrode. 4 In the ethylene glycol solution of F and 2vol% deionized water, oxidize at a voltage of 60V for 2h, and remove the oxide film by ultrasonic; 4 F, 0.5 wt% H 3 PO 4 and 2vol% deionized water in an ethylene glycol solution for the second oxidation, the oxidation voltage is 60V, and the oxidation time is 30min; then it is placed in a high-temperature furnace with a hydrogen atmosphere and calcined at a temperature of 450°C for 2h to obtain titanium dioxide nanotubes ;

...

Embodiment 2

[0033] Compared with Example 1, the preparation of a titanium dioxide nanotube / polyaniline composite electrode in this example is different in that the electropolymerization time in step (2) is 1 min, and the rest are identical. Table 1 shows the charge and discharge test results of the titanium dioxide nanotube / polyaniline composite electrode obtained in this example.

Embodiment 3

[0035] Compared with Example 1, the preparation of a titanium dioxide nanotube / polyaniline composite electrode in this example is different in that the electropolymerization time of step (2) is 15 minutes, and the rest are identical. Table 1 shows the charge and discharge test results of the titanium dioxide nanotube / polyaniline composite electrode obtained in this example.

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Abstract

The invention belongs to the technical field of electrode materials, and discloses a titanium dioxide nanotube / polyaniline composite electrode, preparation and application thereof. The preparation method comprises the following steps: preprocessing a titanium plate, then performing a first electrochemical oxidation treatment on the titanium plate in an ethylene glycol solution including NH4F and deionized water, and removing an oxide film by ultrasonic; placing the titanium plate in an ethylene glycol solution including NH4F, H3PO4 and deionized water and performing a second electrochemical oxidation treatment on the titanium plate, performing high temperature calcination in hydrogen atmosphere and obtaining the titanium dioxide nanotube; then taking an acidic aqueous solution of an aniline monomer as an electrolyte, performing a constant voltage polymerization reaction for 1 to 15min under a voltage of 0.5 to 1V, cleaning and drying, and then obtaining the titanium dioxide nanotube / polyaniline composite electrode. The preparation method disclosed by the invention adopts a two-step anodic oxidation and hydrogen treatment process, so that the composite electrode has a good conductivity, high specific capacitance and good stability, and the method can be used for the preparation of high performance capacitors.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a titanium dioxide nanotube / polyaniline composite electrode and its preparation and application. Background technique [0002] Energy has become one of the most important strategic themes in the world today. The energy crisis and environmental pollution prompt us to explore energy storage devices with excellent performance while studying renewable and clean energy. In recent years, the electrochemical energy storage method has become one of the most promising methods to solve the energy crisis problem due to its high efficiency, environmental protection and pollution-free. Among electrochemical energy storage devices, supercapacitors have attracted extensive attention due to their advantages such as fast energy storage, high power capacity, long service life, wide operating temperature range, and low maintenance cost. Supercapacitors can be divided into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/48H01G11/86
CPCY02E60/13
Inventor 夏正斌陈江琼张燕红
Owner SOUTH CHINA UNIV OF TECH
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