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A kind of application of sulfonated copolyaniline

A technology of sulfonated copolyaniline and copolymerization, which is applied in the direction of hybrid capacitor electrodes, etc., can solve the problems such as sulfonated copolyaniline that have not yet been seen, and achieve the effects of good cycle stability, small series resistance, and small charge transfer resistance.

Inactive Publication Date: 2017-12-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there have been no reports of sulfonated copolyaniline being used as an electrode material for electrochemical supercapacitors at home and abroad.

Method used

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  • A kind of application of sulfonated copolyaniline
  • A kind of application of sulfonated copolyaniline
  • A kind of application of sulfonated copolyaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: the synthesis of sulfonated copolyaniline

[0043] Add aniline (0.0016mol) and 2-hydroxy-5-sulfonic acid aniline monomer (0.0004mol) in 80 / 20 molar ratio to 100mL of 1mol / L hydrochloric acid solution, and place the monomer mixture at 30°C Stir rapidly in a constant temperature water bath for 0.5 h to mix the monomers evenly. Take another beaker, add a certain dose of oxidant-ammonium persulfate, and add 50mL of 1mol / L hydrochloric acid solution, stir until the oxidant is completely dissolved in the hydrochloric acid solution, and place it in the same constant temperature water bath. After the temperature of the oxidizing agent is preheated to be constant, add it dropwise into the monomer mixture at a rate of one drop every 3 seconds, and stir while adding. After the oxidant was added dropwise, the reaction system continued to stir and react for 24 hours in a constant temperature system. Stop stirring after the end of the reaction, and wash the product se...

Embodiment 2

[0045] Embodiment 2: Electrode preparation of sulfonated copolyaniline

[0046] With 80wt% sulfonated copolyaniline and 10wt% conductive agent (can choose carbon black, graphite, graphene etc., choose graphite in the present embodiment) and 10wt% binder (can choose polytetrafluoroethylene PTFE, polytetrafluoroethylene Ethylene PVdF, carboxymethyl cellulose CMC and soluble copolyaniline, etc., polytetrafluoroethylene (PTFE) is selected in this embodiment), placed in a mortar, added an appropriate amount of 1-methyl-2-pyrrolidone for grinding, and then ultrasonic Disperse to form a blended dispersion with a weight concentration of about 2 wt%. Cut the effective area of ​​316L stainless steel mesh to 1×1cm 2 Polish the surface with sandpaper and soak in 4mol / L NaOH solution at 60°C to remove oxidized impurities on the surface. Platinum plate and other materials can also be selected as the substrate for the sulfonated copolyaniline electrode as required. The electrode was prepar...

Embodiment 3

[0047] Embodiment 3: the promotion of sulfonated copolyaniline to homopolyaniline specific capacitance

[0048] The electrodes made of sulfonated copolyaniline and homopolyaniline were subjected to CV cycles respectively, and the obtained spectra are shown in figure 2 , It can be seen that the CV curves of sulfonated copolyaniline and homopolyaniline electrodes both show deformed rectangular peaks, and a broad wrapping peak appears around 0.4V, showing the characteristics of pseudocapacitance and double-layer capacitance. However, the current of sulfonated copolyaniline is larger and the area of ​​the closed peak is larger, indicating that it has significantly improved capacitance compared to polyaniline. The constant current charge and discharge curves of these three electrodes are shown in image 3 , it can be seen that the charge and discharge curves of the sulfonated copolyaniline electrode and the aniline electrode are basically isosceles triangles, and the voltage drop...

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Abstract

The invention relates to application of sulfonated copolyaniline and belongs to the technical field of the uses of conductive polymers. The sulfonated copolyanilin, a conductive agent, and an adhesive are uniformly mixed to prepare dispersion liquid and then prepare a sulfonated copolyaniline electrode. As an electrode material of an electrochemical super capacitor, the sulfonated copolyaniline can be used in the fields of electronic electric appliance power supply, road facility display board power supply, and vehicle hybrid power supply. Compared with a prior art, the sulfonated copolyaniline composited by a chemical oxidative polymerization method has a self-doped sulfonic acid group so as to be enriched with conductivity in a wide potential window and low volume expansion shrinkage in charging and discharging processes. As a result, the sulfonated copolyaniline has high specific capacitance, a good rate capability, and good circulatory stability.

Description

technical field [0001] The invention relates to the application of a conductive polymer, in particular to the application of a sulfonated copolyaniline. Background technique [0002] At present, with the depletion of traditional fossil energy and the deterioration of environmental problems, there is an urgent need for renewable and green and clean new energy storage devices. Supercapacitor is a new type of energy storage device between traditional parallel plate capacitors and batteries, also known as electrochemical capacitors, it combines the strengths of both traditional capacitors and batteries, showing high power density and energy density , has the advantages of fast charging, long life, wide operating temperature, and no pollution to the environment. In recent years, it has attracted great attention from researchers. Hybrid energy electric vehicles, natural energy collection such as wind power and energy storage in solar battery systems, and even wearable integrated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/48
CPCY02E60/13
Inventor 黄美荣李新贵岳成
Owner TONGJI UNIV
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