Polymer supercapacitor using gel polymer as electrolyte and its preparing process

A gel polymer and supercapacitor technology, which is applied in the direction of hybrid capacitor electrolyte, capacitor parts, capacitor electrolyte/absorbent, etc., can solve the problems of liquid supercapacitors, such as difficult packaging and leakage, and achieve good environmental stability and Long service life, easy assembly, and high specific capacitance

Inactive Publication Date: 2002-12-04
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The document "Catia Arbizzani, et al Electrochemica Acta, 41 (1): 21-26, 1996" discloses a conductive polymer with two different p-type dopings of polythiophene (PMTh) and polypyrrole (PPy) as The supercapacitor of the electrode uses liquid electrolyte, and the liquid supercapacitor has the problems of difficult packaging and leakage

Method used

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  • Polymer supercapacitor using gel polymer as electrolyte and its preparing process
  • Polymer supercapacitor using gel polymer as electrolyte and its preparing process
  • Polymer supercapacitor using gel polymer as electrolyte and its preparing process

Examples

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Embodiment 1

[0034] ①.Synthesis of polymethylthiophene

[0035] Propylene glycol carbonate as solvent, supporting electrolyte (Bu) 4 NPF 6 The concentration of methyl thiophene is 0.02M / L, the concentration of methyl thiophene is 0.1M / L, and the system is kept within the range of 5±2°C. The three-electrode method is used for polymerization, and stainless steel is used as the working electrode and the counter electrode, and the silver / silver chloride electrode is Reference electrode, then filled with nitrogen gas for 10 minutes, constant current (j=2mA / cm 2 ) and cyclic voltammetry to synthesize polymethylthiophene. The polymerization time is 6000s.

[0036] ②. Polypyrrole

[0037] Propylene glycol carbonate as solvent, supporting electrolyte (Bu) 4 NPF 6The concentration of pyrrole is 0.02M / L, the concentration of pyrrole is 0.1M / L, the system is kept at 0°C, and the three-electrode method is used for polymerization. The stainless steel is used as the working electrode and the counte...

Embodiment 2

[0045] ①.Synthesis of methylthiophene-methoxythiophene copolymer

[0046] With propylene carbonate as solvent, tetrabutylammonium hexafluorophosphate (Bu) with a concentration of 0.02M / L 4 NPF 6 To support the electrolyte, the total concentration of the mixture of methylthiophene and methoxythiophene (10:1) is 0.1M / L, the system is kept within the range of 5±2°C, and the three-electrode method is used for polymerization, with stainless steel sheet or carbon paper As the working electrode and the counter electrode, the silver / silver chloride electrode is used as the reference electrode, and then filled with nitrogen for 10 minutes, with a constant current (j = 0.1 ~ 10mA / cm 2 ) and cyclic voltammetry to synthesize methylthiophene-methoxythiophene copolymers, with a total polymerization time of 6000s.

[0047] ②. Polypyrrole

[0048] Propylene glycol carbonate as solvent, supporting electrolyte (Bu) 4 NPF 6 The concentration of pyrrole is 0.02M / L, the concentration of pyrro...

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Abstract

This invention adopts Gel polymer electrolyte which is Li ion polymer electrolyte with the multipolymer of polyvinyliene fluoride (PVDF) or vinylidene fluoride-hexafluoropropane as the substrate. Thepreparation method is to add the polymer particles of vinylidene fluoride-hexafluoropropane into acetone to a solution to be added by the solution of ethyl carbonate-propylene carbonate of Li salt 0.5-2M / L to fully mixed with the Gel polymer electrolyte solution which is coated separately on the surface of electrode 1 of prepared polypropyrrole or the surface of electrode of the polymer blend of poly methylthiophene, thereafter to be assembled. The said super capacitor is with high specific capacitance as high as 25f / g, and fine atmosphere stability and durable life time without leakage.

Description

technical field [0001] The invention relates to a supercapacitor, in particular to the structure and preparation method of a supercapacitor composed of conductive polymers as active materials, and belongs to the technical field of electronic devices. Background technique [0002] Supercapacitors are capacitors composed of conductive polymer electrodes. Compared with traditional capacitors, supercapacitors have very high capacitance. In addition, they also have the advantages of high discharge power, fast charge and discharge capabilities, and long cycle life. If compared with electric The power battery in the car is used together to quickly provide high current and high power when starting and climbing; to charge the capacitor during normal driving. [0003] Supercapacitors with conductive polymers as active materials are less costly than noble metal oxide electrodes, and have greater development prospects and competitiveness. Its working principle is: through the rapid and...

Claims

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Application Information

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IPC IPC(8): H01G9/028
CPCH01G11/56C08G2261/1412C08G2261/3221C08G2261/3223Y02E60/13
Inventor 周啸肖强凤姜翠玲冯天富
Owner TSINGHUA UNIV
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