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

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Problems solved by technology

However, since the interface method usually uses organic solvents, it is not conducive to clean production, and during the reaction proces

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

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Example Embodiment

[0024] Example 1

[0025] 279mg of sulfonated graphene was dissolved in 10mL of deionized water, and ultrasonically dispersed for 3h in an ice bath using an ultrasonic cell pulverizer (200W) to make it evenly dispersed; 279mg of aniline monomer was added to the above solution, and then continued Sonicated for 1 h, and then stirred at constant speed for 12 h in an ice bath. The aqueous solution of ammonium persulfate was added dropwise, and the dropwise addition was completed within 0.5 h, and then the reaction was continued for 4 h. 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 the precursor. Then the precursor was dispersed in 1 mol L -1 In the sulfuric acid solution of 2000, stirring and soaking for 12 h to fully dope the precursor with sulfuric acid, and then fil...

Example Embodiment

[0027] Example 2

[0028] 5.58mg of sulfonated graphene was dissolved in 10mL of deionized water, and ultrasonically dispersed for 3h in an ice bath using an ultrasonic cell disintegrator (200W) to make it uniformly dispersed; 279mg of aniline monomer was added to the above solution, and then Continue to sonicate for 1 h, and then stir at constant speed for 12 h under an ice bath. The aqueous solution of ammonium persulfate was added dropwise, and the dropwise addition was completed within 0.5 h, and then the reaction was continued for 4 h. 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 the precursor. Then the precursor was dispersed in 1 mol L -1 In the sulfuric acid solution of 2000, stirring and soaking for 12 h to fully dope the precursor with sulfuric acid, and ...

Example Embodiment

[0033] Example 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 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 1 h, and then stir at constant speed for 12 h under an ice bath. The aqueous solution of ammonium persulfate was added dropwise, and the dropwise addition was completed within 0.5 h, and then the reaction was continued for 4 h. 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 the precursor. Then the precursor was dispersed in 1 mol L -1 In the sulfuric acid solution of 2000, stirring and soaking for 24 h to fully dope the precursor with sulfuric acid, an...

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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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