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Polyaniline-sulfonated graphene composite electrode material and preparation method thereof

A technology of sulfonated graphene and composite electrodes, which is applied to the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, can solve problems such as unfavorable clean production and unfavorable aniline monomers fully doping, etc., to ensure charge delocalization. degree, low preparation cost, and the effect of increasing doping degree

Active Publication Date: 2015-06-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the interface method usually uses organic solvents, it is not conducive to clean production, and during the reaction process, the aniline monomer and sulfonated graphene are distributed in two phases, which is not conducive to the full doping of aniline monomer

Method used

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  • Polyaniline-sulfonated graphene composite electrode material and preparation method thereof
  • Polyaniline-sulfonated graphene composite electrode material and preparation method thereof
  • Polyaniline-sulfonated graphene composite electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Dissolve 279mg of sulfonated graphene in 10mL of deionized water, use an ultrasonic cell pulverizer (200W) to ultrasonically disperse for 3 hours in an ice bath environment to make it uniformly dispersed; add 279mg of aniline monomer to the above solution, and then continue Sonicate for 1h, then stir at a constant speed for 12h in an ice bath. Aqueous ammonium persulfate solution was added dropwise, and the addition was completed within 0.5h, and then the reaction was continued for 4h. After the polymerization, the product was repeatedly washed with deionized water and ethanol until the color of the filtrate was colorless to remove residual monomers and initiators. Finally, the obtained product was vacuum-dried at 60° C. for 24 h to obtain a precursor. Then the precursor was dispersed in 1mol L -1 The sulfuric acid solution was stirred and soaked for 12 hours to fully dope the precursor with sulfuric acid, and then filtered to obtain the polyaniline / sulfonated graphen...

Embodiment 2

[0028] The sulfonated graphene of 5.58mg is dissolved in the deionized water of 10mL, uses the supersonic cell pulverizer (200W) to disperse ultrasonically in ice bath environment 3h to make it disperse evenly; Add the aniline monomer of 279mg in the above-mentioned solution, after that Continue to sonicate for 1h, and then stir at a constant speed for 12h in an ice bath. Aqueous ammonium persulfate solution was added dropwise, and the addition was completed within 0.5h, and then the reaction was continued for 4h. After the polymerization, the product was repeatedly washed with deionized water and ethanol until the color of the filtrate was colorless to remove residual monomers and initiators. Finally, the obtained product was vacuum-dried at 60° C. for 24 h to obtain a precursor. Then the precursor was dispersed in 1mol L -1 The sulfuric acid solution was stirred and soaked for 12 hours to fully dope the precursor with sulfuric acid, and then filtered to obtain the polyanil...

Embodiment 3

[0034] 27.9 mg of sulfonated graphene was dissolved in 10 mL of deionized water, and ultrasonically dispersed for 3 h in an ice-bath environment using an ultrasonic cell pulverizer (200 W) to make it uniformly dispersed; 279 mg of aniline monomer was added to the above solution, and then Continue to sonicate for 1h, and then stir at a constant speed for 12h in an ice bath. Aqueous ammonium persulfate solution was added dropwise, and the addition was completed within 0.5h, and then the reaction was continued for 4h. After the polymerization, the product was repeatedly washed with deionized water and ethanol until the color of the filtrate was colorless to remove residual monomers and initiators. Finally, the obtained product was vacuum-dried at 60° C. for 24 h to obtain a precursor. Then the precursor was dispersed in 1mol L -1 The sulfuric acid solution was stirred and soaked for 24 hours to fully dope the precursor with sulfuric acid, and then filtered to obtain the polyani...

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Abstract

The invention discloses a polyaniline-sulfonated graphene composite electrode material and a preparation method thereof. The preparation method comprises the following steps: fully mixing an aniline monomer with sulfonated graphene uniformly; performing in-situ polymerization to synthesize a polyaniline-sulfonated graphene composite material; doping with sulfuric acid; mixing the composite material, acetylene black and polyvinylidene fluoride; preparing N-methyl pyrrolidone as a solvent; coating slurry on a current collector stainless steel sheet for drying to obtain the composite electrode material. The preparation method is simple, rapid and environmentally-friendly in process. The prepared composite electrode material has the advantages of excellent rate performance, high circulation stability, high specific capacitance and the like, and is suitable for a super capacitor electrode material.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and more specifically relates to a polyaniline-sulfonated graphene composite electrode material and a preparation method thereof. Background technique [0002] As a new type of energy storage element, electrochemical supercapacitors have attracted extensive attention due to their advantages such as high specific power, strong storage capacity, fast charge and discharge speed, no pollution to the environment, and long cycle life. Common doping acids for polyaniline include inorganic small molecule protonic acids (hydrochloric acid, sulfuric acid, perchloric acid, etc.) salicylic acid, dodecylbenzenesulfonic acid, etc.). When the large-sized counter anion is doped into polyaniline, it can reduce its intermolecular interaction force, and the polyaniline molecule exists in an extended chain conformation, which is beneficial to its charge delocalization, increases the interchain cond...

Claims

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Application Information

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IPC IPC(8): H01G11/48H01G11/86C08G73/02
CPCY02E60/13H01G11/48C08G73/02H01G11/86
Inventor 封伟张青青冯奕钰
Owner TIANJIN UNIV
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