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Dedoped Polyaniline/Metal Oxide Hybrids

A hybrid, polyaniline technology, used in electrolytic capacitors, electrical components, circuits, etc., can solve problems such as difficult processing, no public reports on research, and achieve good oxidation/reduction reversibility.

Inactive Publication Date: 2011-11-30
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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  • Dedoped Polyaniline/Metal Oxide Hybrids
  • Dedoped Polyaniline/Metal Oxide Hybrids
  • Dedoped Polyaniline/Metal Oxide Hybrids

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] Place 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 ...

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 de-doped polyaniline / metal oxide hybrid. The hybrid compound is obtained by oxidatively polymerizing aniline monomers for 3 to 12 hours at 10°C to 30°C in the presence of an oxidant and a water-soluble inorganic strong salt of tetravalent titanium or tin. It can be prepared by treating with ammonia water and drying at 150℃~200℃. Using the hybrid compound described in the present invention as the electrode material to assemble a supercapacitor, 1M H2SO4 as the electrolyte solution, when the current density increases from 0.5A g-1 to 30A g-1, the capacity retention rate exceeds 70%. In addition, the hybrids exhibit good oxidation / reduction reversibility in aqueous media with pH ≤ 5. The hybrid compound described in the invention can be used in the preparation of electrode materials for supercapacitors.

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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Patent Type & Authority Patents(China)
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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