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A cerium-doped polyaniline/activated 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: 2018-08-10
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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  • A cerium-doped polyaniline/activated carbon hybrid button supercapacitor
  • A cerium-doped polyaniline/activated carbon hybrid button supercapacitor
  • A cerium-doped polyaniline/activated carbon hybrid button supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 6.32g of absolute ethanol, 72.00g of water, 2.08g of aqueous solution containing poly(2-acrylamido-2-methylpropanesulfonic acid) (referred to as PAMPS, mass fraction 20%) into a 250mL beaker, and stir well. . Subsequently, 1.86 g of aniline was added to the above-mentioned mixed liquid, and the above-mentioned mixed liquid system containing aniline was heated to 80° C. after ultrasonic for 10 minutes, and magnetically stirred at this temperature for 10 minutes. A 40 mL aqueous solution containing 4.56 g of ammonium persulfate at a temperature of 80°C was quickly added to the above-mentioned mixed solution containing aniline, and reacted at a constant temperature of 80°C under stirring for 60 seconds. Subsequently, the reaction system was transferred to an ice water bath with a temperature of 0-5° C. and the reaction was continued for 12 hours. Use acetone to demulsify, wash with water, and filter with suction to obtain polyaniline hollow microspheres. The obtained...

Embodiment 2

[0048] The composition of the cerium-doped polyaniline / activated carbon hybrid button supercapacitor prepared in Example 1:

[0049] The cerium-doped polyaniline hollow microspheres, acetylene black, and polytetrafluoroethylene emulsion were mixed in a mass ratio of 75:15:10, and a small amount of absolute ethanol was added for blending, and the mixture was sonicated for 10 minutes. After removing excess ethanol from the ultrasonic slurry, it is rolled into a thin sheet with a thickness of about 0.2 mm. Using a die, the sheet was punched into a disc with a diameter of 10 mm, and vacuum dried at 70° C. for 12 h to obtain a positive electrode sheet. According to the same method, the active carbon negative electrode sheet was prepared. 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 used as the separator in between, and the ratio is 1mol / L H 2 SO 4 As an electrolyt...

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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 using polyaniline hollow microspheres doped with trivalent cerium ions as the positive electrode active material, and belongs 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 the resulting series of environmental problems, countries around the world are actively developing new energy industries. Renewable energy sources such as wind energy, solar energy and tidal energy have received much attention. However, these energy sources are often affected by external conditions (such as meteorology, climate, and geography) and present instability and discontinuity. To solve this problem, it is necessary to develop relevant supporting high-e...

Claims

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Application Information

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