Ce-doped polyaniline/active carbon hybrid button supercapacitor

A supercapacitor and polyaniline technology, applied in the direction of hybrid capacitors, hybrid capacitor electrodes, capacitors, etc., can solve the problems of symmetrical polyaniline capacitor capacity attenuation, small AC impedance, low energy density, etc., to improve electrochemical activity and reduce Effects of AC impedance and large specific surface area

Active Publication Date: 2016-04-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the existing activated carbon electrode materials such as small specific capacity, low energy density and serious capacity attenuation in the cycle process of symmetrical polyaniline capacitors, the purpose of the present invention is to provide a high specific capacity, small AC impedance and Cerium-doped polyaniline / activated carbon hybrid button supercapacitor with good voltage maintenance capability and stability

Method used

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  • Ce-doped polyaniline/active carbon hybrid button supercapacitor
  • Ce-doped polyaniline/active carbon hybrid button supercapacitor
  • Ce-doped polyaniline/active carbon hybrid button supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take 6.32g of absolute ethanol, 72.00g of water, and 2.08g of an aqueous solution containing poly(2-acrylamido-2-methylpropanesulfonic acid) (referred to as PAMPS, with a mass fraction of 20%) into a 250mL beaker, and stir well . Subsequently, 1.86 g of aniline was added to the above mixture, and after ultrasonication for 10 minutes, the temperature of the above mixture containing aniline was raised to 80° C., and magnetically stirred at this temperature for 10 minutes. Quickly add 40mL aqueous solution containing 4.56g of ammonium persulfate at 80°C to the above mixed solution containing aniline, and react at a constant temperature of 80°C for 60s under stirring conditions. Subsequently, the reaction system was placed in an ice-water bath at a temperature of 0-5° C. to continue the reaction for 12 h. The polyaniline hollow microspheres are obtained by using acetone to break the emulsion, washing with water and suction filtering. The obtained polyaniline hollow micros...

Embodiment 2

[0048] The composition of the cerium-doped polyaniline / activated carbon hybrid button supercapacitor that is obtained with embodiment 1:

[0049] Mix cerium-doped polyaniline hollow microspheres, acetylene black, and polytetrafluoroethylene emulsion at a mass ratio of 75:15:10, add a small amount of absolute ethanol to adjust, and ultrasonicate for 10 minutes. The excess ethanol was removed from the sonicated slurry, and then rolled into thin slices with a thickness of about 0.2 mm. The sheet was punched into a disc with a diameter of 10 mm using a die, and vacuum-dried at 70° C. for 12 hours to obtain a positive electrode sheet. Activated carbon negative electrodes were prepared in the same way. The two pole pieces with similar specific capacity are used as the positive and negative electrodes of the capacitor respectively, and a layer of non-woven fiber cloth is sandwiched in the middle as the separator. 2 SO 4 As an electrolyte, according to image 3 The form is assembl...

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Abstract

The invention discloses a Ce-doped polyaniline / active carbon hybrid button supercapacitor. The capacitor comprises a capacitor housing, an anode sheet, a cathode sheet, a diaphragm and an electrolyte, wherein the anode sheet is prepared by a polyaniline hollow microballoon active substance whose surface is doped with trivalent cerium ions, and the cathode sheet is prepared by a cathode material containing an active carbon active substance. The Ce-doped polyaniline / active carbon hybrid button supercapacitor obtained after assembling is large in specific capacity, small in AC impedance and quite small in leakage current density.

Description

technical field [0001] The invention relates to a cerium-doped polyaniline / activated carbon hybrid button supercapacitor, in particular to a button supercapacitor with polyaniline hollow microspheres doped with trivalent cerium ions on the surface as the positive active material, belonging to the field of chemical capacitors . Background technique [0002] Energy crisis and environmental protection have gradually become two major problems in the 21st century. In order to alleviate the increasingly severe energy crisis and a series of environmental problems arising from it, countries all over the world are actively developing new energy industries. Renewable energy sources such as wind energy, solar energy and tidal energy have received a lot of attention. However, these energy sources are often affected by external conditions (such as weather, climate, and geography) and present instability and discontinuity. To solve this problem, it is necessary to develop relevant supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/04H01G11/38
CPCY02E60/13H01G11/04H01G11/38
Inventor 李芝华李彦博
Owner CENT SOUTH UNIV
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