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Polyaniline nano-fiber electrode material for super capacitor and preparation method thereof

A supercapacitor and nanofiber technology, which is applied in the manufacture of hybrid/electric double layer capacitors, capacitors, electrolytic capacitors, etc., to achieve the effects of simple preparation process, inhibition of agglomeration and secondary growth, and controllable size and structure

Inactive Publication Date: 2010-05-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Selecting low temperature conditions, combining interfacial polymerization and adding initiators to prepare polyaniline nanofibers, so that polyaniline has good one-dimensional directionality, electrical conductivity and electrochemical properties, has not been reported yet

Method used

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  • Polyaniline nano-fiber electrode material for super capacitor and preparation method thereof
  • Polyaniline nano-fiber electrode material for super capacitor and preparation method thereof
  • Polyaniline nano-fiber electrode material for super capacitor and preparation method thereof

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Embodiment 1

[0024] Embodiment 1: supercapacitor electrode material polyaniline nanofiber I.

[0025] Dissolve 4mmol of aniline monomer and 10mg of p-phenylenediamine in 80ml of dichloromethane, dissolve 0.23g of ammonium persulfate in 80ml of 1mol / L hydrochloric acid, mix the two solutions, and polymerize at 1°C for 12 hours to synthesize polyaniline nanofibers . Liquid separation, suction filtration, washing with deionized water and ethanol respectively, and vacuum drying at room temperature for 24 hours to obtain polyaniline nanofiber powder. The prepared polyaniline nanofibers were characterized by field emission scanning electron microscopy (such as figure 2 ), indicating that the prepared polyaniline nanofibers have a diameter of about 100 nm and a length of 1 μm. The electrochemical test of the three-electrode system was carried out on the prepared polyaniline nanofibers: the electrolyte was 1mol / L H 2 SO 4 , the reference electrode is Ag / AgCl, and the auxiliary electrode is pl...

Embodiment 2

[0026] Embodiment 2: Supercapacitor electrode material polyaniline nanofiber II.

[0027] Dissolve 8mmol of aniline monomer and 20mg of p-phenylenediamine in 40ml of dichloromethane, dissolve 0.46g of ammonium persulfate in 40ml of 1mol / L hydrochloric acid, mix the two solutions, and polymerize at 1°C for 6 hours to synthesize polyaniline nanofibers . Liquid separation, suction filtration, washing with deionized water and ethanol respectively, and vacuum drying at room temperature for 24 hours to obtain polyaniline nanofiber powder. The electrochemical test of the three-electrode system was carried out on the prepared polyaniline nanofibers: the electrolyte was 1mol / L H 2 SO 4 , the reference electrode is Ag / AgCl, and the auxiliary electrode is platinum electrode. The test shows that: when the discharge current is 1mA, the specific capacitance of polyaniline nanofiber reaches 459Fg -1 , as the current density increases from 1mA to 10mA, the specific capacity decays by 13%....

Embodiment 3

[0028] Embodiment 3: Supercapacitor electrode material polyaniline nanofiber III.

[0029] Dissolve 8mmol of aniline monomer and 20mg of p-phenylenediamine in 40ml of dichloromethane, dissolve 0.46g of ammonium persulfate in 40ml of 1mol / L sulfuric acid, mix the two solutions, and polymerize at 1°C for 12 hours to synthesize polyaniline nanofibers . Liquid separation, suction filtration, washing with deionized water and ethanol respectively, and vacuum drying at room temperature for 24 hours to obtain polyaniline nanofiber powder. The electrochemical test of the three-electrode system was carried out on the prepared polyaniline nanofibers: the electrolyte was 1mol / L H 2 SO 4 , the reference electrode is Ag / AgCl, and the auxiliary electrode is platinum electrode. The test shows that: when the discharge current is 1mA, the specific capacitance of polyaniline nanofiber reaches 484.66Fg -1 , as the current density increases from 1mA to 10mA, the specific capacity decays by 15....

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Abstract

The invention discloses a polyaniline nano-fiber electrode material for a super capacitor and a preparation method thereof, belonging to the field of electrochemistry and new energy material. The method is characterized by comprising the steps of: dissolving aniline and initiating agent into dichloromethane organic phase, dissolving oxidizing agent into inorganic acid dope additive water phase, carrying out interfacial polymerization at the temperature of 0-30 DEG C, and obtaining the polyaniline nano-fiber electrode material by separating liquid, washing and drying; wherein the volume ratio between the dichloromethane organic phase and the inorganic acid dope additive water phase is 1:1, the concentration range of the aniline is 0.02-1mol / L, the concentration range of the initiating agent is 0.02-0.002mol / L, and the molar ratio range between the aniline and the oxidizing agent is 1:1-8:1. The polyaniline nano-fiber is controllable in structure as well as good in one-dimensional directivity, electrical conductivity and electrochemical properties. The electrode material has the specific capacitance of 549Fg-1 and the advantage of simple preparing technique.

Description

technical field [0001] The invention discloses a preparation method of a polyaniline nanofiber electrode material for a supercapacitor, belonging to the fields of electrochemistry and new energy materials. Background technique [0002] Supercapacitors, also called electrochemical capacitors, are new energy devices developed in the 1970s and 1980s between conventional capacitors and batteries. Widely used in power systems (such as hybrid electric vehicles); electronic devices (such as auxiliary power supplies for electronic equipment); aerospace (such as aircraft) and other fields. Electrode materials are the main factors affecting the performance of capacitors. Among many conductive polymers, polyaniline nanofibers have become a hot spot in the research of supercapacitor electrode materials due to their high specific capacity, low-dimensional structure, low price, and easy synthesis. . [0003] The preparation methods of polyaniline nanofibers mainly include chemical metho...

Claims

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Application Information

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IPC IPC(8): H01G9/058H01G11/86
CPCY02E60/13
Inventor 范丽珍关慧韩凌王寻冯玉川
Owner UNIV OF SCI & TECH BEIJING
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