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A polyaniline/carbon mixed super capacitor

A supercapacitor, polyaniline technology, applied in hybrid capacitor electrodes, hybrid capacitor electrolytes, capacitors, etc., can solve the problems of unsatisfactory energy density and low specific energy.

Inactive Publication Date: 2007-08-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific energy of the existing polyaniline / carbon hybrid supercapacitors is still low, so the energy density is not yet ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The positive electrode is an electrode prepared by a single component of polyaniline nanofiber doped with lithium salt, and the electrolyte is 1mol / L LiPF 6 EC / DEC / DMC (EC / DEC / DMC=1 volume ratio) solution, the negative electrode is activated carbon electrode.

[0013] Preparation: (1) Lithium-salt-doped polyaniline nanofibers, nano-carbon black (conductive agent), PVDF (binder) were added dropwise with NMP (N-methylpyrrolidone) at a ratio of 8:1:1 The mass ratio is mixed evenly, coated on the metal foil, after pressing, vacuum-dried to make a polyaniline electrode; (2) active carbon, nano carbon black (conductive agent), PVDF (bonding agent) are added dropwise to the condition of NMP Mix evenly with the mass ratio of 8:1:1, apply on the metal foil, after pressing, vacuum-dry, make activated carbon electrode; With 1mol / L LiPF 6 EC / DEC / DMC (EC / DEC / DMC=1 volume ratio) solution was used as the electrolyte, and Celgard2300 microporous membrane was used as the diaphragm, an...

Embodiment 2

[0015] The positive electrode is an electrode prepared by a single component of polyaniline nanofiber doped with lithium salt, and the electrolyte is 1mol / L LiBF 4 EC / DEC (EC / DEC=1 volume ratio) solution, the negative electrode is a carbon nanotube electrode.

[0016] Preparation: (1) Mix lithium salt-doped polyaniline nanofibers, nanocarbon black, and PVDF in a mass ratio of 8:1:1 under the condition of dropping NMP, apply them on the metal foil, press, vacuum Dry to make polyaniline electrode; (2) carbon nanotubes, nanocarbon black, PVDF are mixed uniformly with the mass ratio of 8:1:1 under the condition of dripping NMP, be coated on the metal foil, after pressing, vacuum Dry to make a carbon nanotube electrode; (3) use the above-mentioned polyaniline electrode and carbon nanotube electrode as positive and negative electrodes respectively, and use 1mol / LLiBF 4 EC / DEC (EC / DEC=1 volume ratio) solution was used as the electrolyte, and Celgard2300 microporous membrane was used...

Embodiment 3

[0018] The positive electrode is an electrode made of a composite material of lithium salt-doped polyaniline nanofibers and carbon nanotubes, and the electrolyte is 1mol / L Et 4 NBF 4 / PC solution, the negative electrode is a carbon nanofiber electrode.

[0019] Preparation: (1) the composite material of lithium salt-doped polyaniline nanofibers and carbon nanotubes (the mass percentage of carbon nanotubes is 30%), nano carbon black, and PVDF are mixed under the condition of adding NMP with 8:1: The mass ratio of 1 is mixed evenly, coated on the metal foil, and after pressing, vacuum-dried to obtain a polyaniline electrode; (2) carbon nanofibers, nano-carbon black, and PVDF are mixed at a ratio of 8:1:1 under the condition of adding NMP The mass ratio of 1 is mixed evenly, coated on the metal foil, and after pressing, vacuum-dried to obtain a carbon nanofiber electrode; (3) the polyaniline electrode and the carbon nanofiber electrode prepared above are used as positive and neg...

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Abstract

The disclosed polyaniline / charcoal mixed super capacitor comprises: an anode as Li-doped nano polyaniline fiber or composite with charcoal, the organic electrolyte, and a charcoal-made cathode. Compared with prior art, this invention holds same performance and higher energy density.

Description

technical field [0001] The invention relates to a supercapacitor, in particular to a polyaniline / carbon hybrid supercapacitor. Background technique [0002] According to the electrodes used, supercapacitors can be divided into two types: symmetrical and asymmetrical. The latter can also be called hybrid supercapacitors. The materials of the positive and negative electrodes are different, and the energy storage mechanism of the two electrodes is also different. While ensuring sufficient output power, this hybrid supercapacitor can improve the energy density of the capacitor compared with the symmetrical type. Most of the existing hybrid supercapacitors are oxide / carbon and polymer / carbon systems. Among them, the polyaniline / carbon hybrid supercapacitor combines the high specific energy of polyaniline (PANI) and the good conductivity and cycle stability of carbon materials. At the same time, the synergistic effect of the two can effectively improve the energy storage characte...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/058H01G9/035H01G9/038H01M4/00H01M14/00H01G11/32H01G11/58
CPCY02E60/13
Inventor 李劼张治安卢海赖延清李晶李荐宋海申刘业翔
Owner CENT SOUTH UNIV
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