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Conductive polymer hydrogel preparation method and application of conductive polymer hydrogel in super capacitor

A conductive polymer and hydrogel technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of reducing the specific surface area, energy density and electron transport capacity of electrode materials, poor cycle stability and processability, and low conductivity of electrode materials, etc., to achieve Excellent cycle stability, excellent rate performance, low cost effect

Inactive Publication Date: 2018-04-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional conductive polymer materials usually need to add binders and conductive active substances as electrodes, which greatly reduces the specific surface area, energy density and electron transport capacity of electrode materials, resulting in low conductivity and stable cycling of electrode materials. and poor processability, these shortcomings limit its application in high-performance equipment

Method used

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  • Conductive polymer hydrogel preparation method and application of conductive polymer hydrogel in super capacitor
  • Conductive polymer hydrogel preparation method and application of conductive polymer hydrogel in super capacitor
  • Conductive polymer hydrogel preparation method and application of conductive polymer hydrogel in super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 10 mg of sodium alginate and dissolve in 0.5 mL of distilled water. Stir for 1 hour to fully dissolve, then place it in an ice-water bath at 0°C; dissolve 2mmol of EDOT in 0.5mL of ethanol, and then place it in an ice-water bath at 0°C; dissolve 2mmol of ammonium persulfate in 0.5mL of distilled water . Then add the EDOT solution drop by drop into the sodium alginate solution under the condition of stirring. Place it at 4°C for 24-48 hours to form poly(3,4-ethylenedioxythiophene) gel, wash the prepared gel with distilled water and ethanol for 2-3 times; then freeze-dry to obtain the product For SEM testing.

Embodiment 2

[0036] Weigh 10 mg of sodium alginate and dissolve in 0.5 mL of distilled water. Stir for 1 hour to fully dissolve, then place it in an ice-water bath at 0°C; dissolve 2mmol of EDOT in 0.5mL of ethanol, and then place it in an ice-water bath at 0°C; dissolve 4mmol of ammonium persulfate in 0.5mL of distilled water . Then add the EDOT solution drop by drop into the sodium alginate solution under the condition of stirring. Place it at 4°C for 24-48 hours to form poly(3,4-ethylenedioxythiophene) gel, wash the prepared gel with distilled water and ethanol for 2-3 times; then freeze-dry to obtain the product For SEM testing.

Embodiment 3

[0038] Weigh 10 mg of sodium alginate and dissolve in 0.5 mL of distilled water. Stir for 60 minutes to fully dissolve it, and then place it in an ice-water bath at 0°C; dissolve 1.5mmol of EDOT in 0.5mL of ethanol, and then place it in an ice-water bath at 0°C; dissolve 4mmol of ammonium persulfate in 0.5mL of distilled water. Then add the EDOT solution drop by drop into the sodium alginate solution under the condition of stirring. Place it at 4°C for 24-48 hours to form poly(3,4-ethylenedioxythiophene) gel, wash the prepared gel with distilled water and ethanol for 2-3 times; then freeze-dry to obtain the product For SEM testing.

[0039] figure 1 It is a digital photo of poly(3,4-ethylenedioxythiophene) before and after gelation. During the process from solution to gel, the color changes obviously, from white-yellow-green-dark green-black. figure 2 SEM of poly(3,4-ethylenedioxythiophene) gels prepared for different ratios of EDOT and ammonium persulfate. Ethylenedioxyt...

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Abstract

The invention provides a preparation method of a poly (3,4-EDOT)hydrogel having good machinery performance and excellent electrochemical performance as well as an application of the hydrogel in a super capacitor. The preparation method comprises the following steps: under ice bath condition, a conductive polymer monomer 3,4-EDOT is added in a sodium alginate solution, the materials are uniformly stirred, an ammonium persulfate solution is added in a mixed solution, the materials are uniformly stirred and placed under environment at the temperature of 4 DEG C, and reacted for 24-48 h. The invention relates to a preparation method of an electrode of the poly (3,4-EDOT)hydrogel, which is characterized in that a stainless steel mesh is coated with the finally obtained mixed liquor, then the materials are placed under environment at the temperature of 4 DEG C, and then reacted for 24-48 h, dilute sulfuric acid, ethanol and distilled water are used in order for washing, and the material is dried to obtain the gel electrode. The method avoids addition of a high-molecular binder and a conductive activator, and increases the conductivity and cycle stability.

Description

technical field [0001] The invention relates to a preparation method of a conductive polymer hydrogel, in particular to a preparation method and application of a conductive polymer hydrogel obtained by crosslinking poly(3,4-ethylenedioxythiophene) with a high molecular polymer. Background technique [0002] Conductive polymers store charges through doping and dedoping processes, and are a typical Faraday pseudocapacitor electrode material. Because of its low price, environmental friendliness, high conductivity, and large storage capacity, it has great application potential in the fields of supercapacitors and batteries. However, traditional conductive polymer materials usually need to add binders and conductive active substances as electrodes, which greatly reduces the specific surface area, energy density and electron transport capacity of electrode materials, resulting in low conductivity and stable cycling of electrode materials. And poor machinability, these shortcoming...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08J3/075C08L5/04C08L65/00C08G61/12H01G11/24H01G11/48
CPCC08G61/122C08G61/126C08G2261/11C08G2261/324C08J3/075C08J3/246C08J2305/04C08J2365/00C08J2405/04C08J2465/00H01G11/24H01G11/48Y02E60/13
Inventor 郑俊张翼刘静静
Owner CENT SOUTH UNIV
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