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Poly(3,4-ethylenedioxythiophene)/sulfonated graphene composite hydrogel and preparation method thereof

A technology of ethylenedioxythiophene and sulfonated graphene, which is applied in the direction of electrolytic capacitors, electrical components, circuits, etc., can solve the problems of high specific capacitance and unobtainable conductivity, and achieve easy operation, easy scale-up production, and wide-ranging The effect of applying the foreground

Inactive Publication Date: 2012-07-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEDOT composite hydrogel has improved mechanical strength due to the introduction of a large amount of polystyrene sodium sulfonate and polymers, but the rapid decay of electrical conductivity makes it impossible to obtain high specific capacitance when used as a supercapacitor electrode material

Method used

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  • Poly(3,4-ethylenedioxythiophene)/sulfonated graphene composite hydrogel and preparation method thereof
  • Poly(3,4-ethylenedioxythiophene)/sulfonated graphene composite hydrogel and preparation method thereof
  • Poly(3,4-ethylenedioxythiophene)/sulfonated graphene composite hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of PEDOT / sulfonated graphene composite hydrogel, the steps are as follows:

[0033] (1) At room temperature, mix 0.309g sodium polystyrene sulfonate (20.6g / L, purchased from Aldrich, Germany) and 1mg sulfonated graphene (67mg / L) (see Zhao G, Jiang L, He Y for the preparation method) , Li JX, Dong HL, Wang XK, et al. Sulfonated graphene for persistent aromatic pollutant management . Advanced Materials, 2011,23:3959. ) was added to 15mL of water, stirred and dispersed by ultrasonic waves to form a dispersion;

[0034] (2) Add 770 μL (7 mmol) of 3,4-ethylenedioxythiophene monomer (purchased from Suzhou Bohong Chemical Technology Co., Ltd.) into the above dispersion liquid, stir and disperse with ultrasonic wave for 1 hour, and disperse evenly;

[0035] (3) 14.1g Fe (NO 3 ) 3 9H 2 O (purchased from Sinopharm Chemical Reagent Co., Ltd.) was dissolved in 5 mL of water, and added to the reaction system formed in step (2) at one time, and continued to st...

Embodiment 2

[0037] Embodiment 2. A kind of preparation method of PEDOT / sulfonated graphene composite hydrogel, its difference with embodiment 1 is that the concentration of sodium polystyrene sulfonate becomes 103g / L, the concentration of sulfonated graphene becomes 6.7mg / L, the static reaction time changed from 6 hours to 12 hours, and the purification equilibrium time changed from 2 days to 4 days.

Embodiment 3

[0038] Embodiment 3. A preparation method of PEDOT / sulfonated graphene composite hydrogel, its difference from Example 1 is that the concentration of sodium polystyrene sulfonate becomes 206g / L, and the concentration of sulfonated graphene becomes 133mg / L L ,14.1g Fe (NO 3 ) 3 9H 2 O becomes 9.5g FeCl 3 ·6H 2 O (purchased from Sinopharm Chemical Reagent Co., Ltd.), the standing reaction time changed from 6 hours to 10 hours, the purification equilibrium time changed from 2 days to 3 days, and the pore size was 3 μm-10 μm.

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Abstract

The invention relates to a method for preparing poly(3,4-ethylenedioxythiophene) / sulfonated graphene composite hydrogel with a porous structure through supramolecular self-assembly. The method comprises the following steps of: dissolving sodium polystyrene sulfonate and sulfonated graphene in water, stirring, performing ultrasonic dispersion to ensure that the sodium polystyrene sulfonate and thesulfonated graphene are dissolved, adding a 3,4-ethylenedioxythiophene monomer, uniformly stirring, adding polyvalent iron salt, standing at room temperature and reacting to obtain blocky poly(3,4-ethylenedioxythiophene) / sulfonated graphene composite hydrogel. The poly(3,4-ethylenedioxythiophene) / sulfonated graphene composite hydrogel with a controllable and porous structure is prepared by using the interaction and electrostatic action of a hydrogen bond and a pi-pi bond among the sulfonated graphene, the sodium polystyrene sulfonate and 3,4-ethylenedioxythiophene through supramolecular self-assembly. The prepared composite hydrogel has high electrical conductivity and mechanical strength, and high specific capacitance and cycle stability in electroactive electrolyte.

Description

technical field [0001] The invention relates to the field of conductive polymer composite materials, in particular to the field of composite materials for supercapacitor electrodes. Background technique [0002] The special chemical composition, conjugated structure and unique doping / dedoping behavior of conductive polymers endow them with excellent electrical, optical, redox and other properties. In the late 1980s, conductive polymers with high voltage windows began to attract people's attention as electrode active materials for supercapacitors, such as polyaniline (PANI), polypyrrole (PPy), polythiophene, and polyparaphenylene. The quasi-capacitor with conductive polymer as electrode material has high specific capacitance, but small specific surface and poor conductivity, which reduces the utilization rate of the material. Moreover, conductive polymers are brittle and have low mechanical strength. During the doping / dedoping process, they will experience swelling, shrinkag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08K9/04C08K3/04C08G61/12C08J3/03H01G9/042
Inventor 韩永芹申明霞肖晋宜王圣武
Owner HOHAI UNIV
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