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Poly(3,4-ethylenedioxythiophene) aligned array layer thin-film electrode material and preparing method thereof

A technology of polyethylene dioxythiophene and ethylene dioxythiophene, which is applied in the fields of capacitor electrodes, capacitor parts, and nanostructure manufacturing, can solve the problem of reducing the electrical conductivity and electrochemical performance of PEDOT polymer products, and reducing the doping of polymer products. It can achieve the effect of low experimental conditions and equipment requirements, easy operation and good electrochemical stability.

Inactive Publication Date: 2011-01-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hard template used in the PEDOT polymerization process needs to be removed by HF or NaOH to obtain nanotube-like or nanowire-like PEDOT. The severe strong acid and strong alkali conditions destroy the hard template and also damage the nanofiber-like or nanowire-like form of PEDOT. At the same time, NaOH, as a strong base, can de-dope PEDOT, reduce the doping degree of the polymerization product, and finally significantly reduce the electrical conductivity and electrochemical performance of the PEDOT polymerization product.
In addition, there are methods to control the nanofiber structure of PEDOT by using microelectrodes or two-phase electrolyte systems. These methods are complex in operation and harsh in synthesis conditions, and are not easy to be popularized and applied.

Method used

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  • Poly(3,4-ethylenedioxythiophene) aligned array layer thin-film electrode material and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Electrochemical polymerization of PEDOT by constant current, the reaction device is a single electrolytic cell, using a three-electrode system, the reference electrode is a saturated KCl electrode of Ag / AgCl, the counter electrode is a platinum electrode, and the working electrode is a tantalum electrode (1cm×1cm) . After grinding and polishing the tantalum sheet of the working electrode, it was washed repeatedly with acetone and deionized water alternately, and dried at 60°C for 6 hours before use. Weigh 218.7mg of surfactant CTAB into 20ml of 0.074mol / L hydrochloric acid, ultrasonically disperse and dissolve, and add 26μl monomer EDOT into the above solution, continue ultrasonically dispersing for 1-2 hours, so that EDOT is evenly dispersed in CTAB A white emulsion is formed in the aqueous solution, and the above solution is placed in an ice-water bath at a constant temperature for 30 minutes to ensure that the temperature of the electrochemical solution system is 0-5...

Embodiment 2

[0023] Electrochemical polymerization of PEDOT by constant current, the reaction device is a single electrolytic cell, using a three-electrode system, the reference electrode is a saturated KCl electrode of Ag / AgCl, the counter electrode is a platinum electrode, and the working electrode is a tantalum electrode (1cm×1cm) . After grinding and polishing the tantalum sheet of the working electrode, it was washed repeatedly with acetone and deionized water alternately, and dried at 60°C for 6 hours before use. Weigh 14.6mg of surfactant CTAB into 20ml of 0.074mol / L hydrochloric acid, ultrasonically disperse and dissolve, and add 26μl monomer EDOT to the above solution, continue ultrasonically dispersing for 1 to 2 hours, so that EDOT is evenly dispersed in CTAB A white emulsion is formed in the aqueous solution, and the above solution is placed in an ice-water bath at a constant temperature for 30 minutes to ensure that the temperature of the electrochemical solution system is 0-5...

Embodiment 3

[0026] Electrochemical polymerization of PEDOT by constant current, the reaction device is a single electrolytic cell, using a three-electrode system, the reference electrode is a saturated KCl electrode of Ag / AgCl, the counter electrode is a platinum electrode, and the working electrode is a tantalum electrode (1cm×1cm) . After grinding and polishing the tantalum sheet of the working electrode, it was washed repeatedly with acetone and deionized water alternately, and dried at 60°C for 6 hours before use. Weigh 510.2 mg of surfactant CTAB and add it to 20 ml of 0.074 mol / L hydrochloric acid, ultrasonically disperse and dissolve, and add 26 μl monomer EDOT to the above solution, continue ultrasonically dispersing for 1 to 2 hours, so that EDOT is evenly dispersed in CTAB A white emulsion is formed in the aqueous solution, and the above solution is placed in an ice-water bath at a constant temperature for 30 minutes to ensure that the temperature of the electrochemical solution...

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Abstract

The present invention relates to a poly(3,4-ethylenedioxythiophene) aligned array layer thin-film electrode material and a preparing method thereof. The poly(3,4-ethylenedioxythiophene) aligned array layer thin-film electrode material is prepared through electrolyzing the monomer ethylenedioxythiophene as the raw material while the cetyl trimethyl ammonium bromide (CTAB) is used as a surfactant. Asystem with a single electrolytic cell and three electrodes and the constant-current polymerization are adopted. The reference electrode is an Ag / AgCl electrode, the counter electrode is a platinum sheet, and the working electrode is a tantalum sheet (1cm*1cm). The current density and the polymerization time of the electrochemical polymerization are controlled through a potentiostat, and the product film is deposited on the surface of the working electrode. The acetone and the deionized water are respectively used for washing and eliminating the unreacted monomer and the emulsifying agent. The dark-blue poly(3,4-ethylenedioxythiophene) thin-film electrode is obtained after vacuum drying. The Poly(3,4-ethylenedioxythiophene) aligned array layer thin-film electrode material and the preparing method of the invention have an advantage that the PEDOT aligned array layer with better capacitance capability and excellent electrochemical stability can be prepared.

Description

technical field [0001] The invention relates to a polyethylene dioxythiophene oriented array layer film electrode material and a preparation method thereof, belonging to the preparation technology of photoelectric functional materials. Background technique [0002] Polyethylenedioxythiophene [poly(3,4-ethylenedioxythiophene), PEDOT] is a new type of conductive polymer. Compared with other conductive polymers, it has high conductivity, good capacitance, good transparency of oxide film, and It has outstanding stability, as well as wide potential window and low energy gap. It is widely used in supercapacitors, solar cells, electromagnetic interference shielding and other fields. [0003] Supercapacitors have the advantages of large specific power, strong storage capacity, and fast charging and discharging speeds, and are expected to become a new type of green energy. The use of polymers as electrode active materials for electrochemical capacitors is a hot topic of current res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/04H01G9/042B82B1/00B82B3/00
Inventor 封伟王碧琛李瑀唐赛德
Owner TIANJIN UNIV