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Hybrid of dedoping-state polyaniline/metallic oxide

A technology of hybrids and polyaniline, applied in electrolytic capacitors, electrical components, circuits, etc., can solve the problems of difficult processing and no public reports on research, and achieve good oxidation/reduction reversibility

Inactive Publication Date: 2010-06-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although conductive polyaniline has many excellent physical and chemical properties, the processing problem has always been a difficult problem in the process of its practical application.
[0005] Although there have been many reports on the preparation of conductive polyaniline / titanium (tin) oxide composites by different methods, there is no public report on the direct preparation of polyaniline / titanium (tin) oxide hybrids in the corresponding inorganic salt system.

Method used

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  • Hybrid of dedoping-state polyaniline/metallic oxide
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  • Hybrid of dedoping-state polyaniline/metallic oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 1.2g of titanium sulfate in a reactor containing 80ml of deionized water and stir until completely dissolved; take 0.9ml of aniline and add it to the above salt solution; dissolved in 20ml of deionized water); followed by oxidative polymerization at 20°C for 6 hours without stirring, filtering, and washing the filter cake until neutral. Transfer the filter cake to a reactor, add 10w% ammonia water and stir at 20° C. for 24 hours; filter and wash the filter cake until neutral. Drying at 150° C. for 5 hours in an inert atmosphere to obtain a de-doped polyaniline / titanium oxide hybrid powder.

[0027] Energy spectrum analysis (EDS) proves that titanium, oxygen exists in the obtained product; FTIR (KBr) shows that there is a Ti-O-Ti bond (500cm -1 ~650cm -1 ). The content of titanium oxide in the hybrid is 15wt%-20wt%, and the two main thermogravimetric temperature ranges are: 400°C-450°C and 650°C-700°C. Electrochemical studies show that the hybrid is electrochemic...

Embodiment 2

[0029] Put 2.4g of titanium sulfate in a reactor containing 80ml of deionized water and stir until completely dissolved; take 0.9ml of aniline and add it to the above-mentioned salt solution; dissolved in 20ml of deionized water); followed by oxidative polymerization at 25°C for 3 hours without stirring, filtering, and washing the filter cake until neutral. Transfer the filter cake to a reactor, add 15 wt% ammonia water and stir at 25°C for 36 hours; filter and wash the filter cake until neutral. Drying for 3 hours under the condition of 180° C. in an inert atmosphere to obtain a de-doped polyaniline / titanium oxide hybrid powder.

[0030] Energy spectrum analysis (EDS) proves that titanium, oxygen exists in the obtained product; FTIR (KBr) shows that there is a Ti-O-Ti bond (500cm -1 ~650cm -1 ). The content of titanium oxide in the hybrid is 15wt%-20wt%, and the two main thermogravimetric temperature ranges are: 400°C-450°C and 650°C-700°C. Electrochemical studies show th...

Embodiment 3

[0032] Place 7.2g of titanium sulfate in a reactor containing 80ml of deionized water and stir until completely dissolved; take 0.9ml of aniline and add it to the above-mentioned salt solution; dissolved in 20ml deionized water); then oxidatively polymerized at 20°C for 9 hours without stirring, filtered, and the filter cake was washed until neutral. Transfer the filter cake to a reactor, add 20 wt% ammonia water and stir for 48 hours at 20° C.; filter and wash the filter cake until neutral. Drying for 2 hours under the condition of 180° C. in an inert atmosphere to obtain a de-doped polyaniline / titanium oxide hybrid powder.

[0033] Energy spectrum analysis (EDS) proves that titanium, oxygen exists in the obtained product; FTIR (KBr) shows that there is a Ti-O-Ti bond (500cm -1 ~650cm -1 ). The content of titanium oxide in the hybrid is 15wt%-20wt%, and the two main thermogravimetric temperature ranges are: 400°C-450°C and 650°C-700°C. Electrochemical studies show that th...

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Abstract

The invention relates to a hybrid of a dedoping-state polyaniline / metallic oxide, which is prepared by the following steps of: carrying out oxidation polymerization on an aniline monomer for 3 hours to 12 hours at10 DEG C-30 DEG C, in the presence of an oxidant and the water-soluble inorganic strong acid salt of quadrivalent titanium or tin, and processing an obtained polymer by ammonia water and finally drying at 150 DEG C-200 DEG C. The hybrid is an electrode material and assembled as a super capacitor, 1 M of H2SO4 is uses as an electrolyte solution, and when current density is enhanced from 0.5 A g-1 to 30 A g-1, the capacity retention rate of the super capacitor exceeds 70 percent; besides, the hybrid shows good oxidation / reduction reversibility in an aqueous medium with pH value not more than 5 and can be used for preparing the electrode material of the super capacitor.

Description

technical field [0001] The invention relates to a de-doped polyaniline / metal oxide hybrid, in particular to a de-doped polyaniline / metal titanium (tin) oxide hybrid. Background technique [0002] As one of the typical representatives of conductive polymers, conductive polyaniline has the advantages of easy-to-obtain raw materials, simple synthesis, and good environmental stability (especially the simple and reversible proton acid doping / dedoping process), making polyaniline It shows great application potential in many high-tech fields. [0003] Although conductive polyaniline has many excellent physical and chemical properties, the processing problem has always been a difficult problem in the process of its practical application. A major breakthrough to solve this problem is the use of organic acids as dopants. The results of the study showed that conductive polyaniline doped with organic acids can be dissolved in organic solvents compatible with these acids (P.Ghosh, S.K....

Claims

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Application Information

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IPC IPC(8): C08L79/02C08K3/22C08G73/02H01G9/042
CPCY02E60/13
Inventor 李星玮张涵王庚超李笑寒
Owner EAST CHINA UNIV OF SCI & TECH
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