A polyaniline-based mof nanocomposite flexible supercapacitor and preparation method thereof

A nanocomposite material and supercapacitor technology, applied in the field of energy, can solve the problems of reducing specific capacity, increasing polyaniline charge-discharge cycle stability, and reducing specific surface area, so as to achieve good electrochemical characteristics and stability, and improve electrochemical performance. Cycling stability, effect of increasing charge transfer

Active Publication Date: 2019-08-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although polyaniline has many advantages, because the molecular chains of polyaniline are easy to accumulate and the specific surface area is reduced, the charge transport path is blocked, which affects its conductivity.
And the molecular chain will swell or shrink during the charging and discharging process, which will affect its cycle stability.
Many researchers compound it with metal oxides, graphene, carbon nanotubes, etc. to improve its electrochemical performance. However, these methods have not completely solved the problem, and most of them can only partially improve the performance of polyaniline. , and even some methods improve the performance on the one hand but reduce the other part of the performance, such as increasing the charge-discharge cycle stability of polyaniline and reducing its specific capacity

Method used

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  • A polyaniline-based mof nanocomposite flexible supercapacitor and preparation method thereof
  • A polyaniline-based mof nanocomposite flexible supercapacitor and preparation method thereof
  • A polyaniline-based mof nanocomposite flexible supercapacitor and preparation method thereof

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preparation example Construction

[0022] A preparation method of a polyaniline-based MOF nanocomposite flexible supercapacitor of the present invention comprises the following steps:

[0023] 1. PANI / MIL-101 nanocomposites were prepared by in-situ polymerization as electrode active materials;

[0024] The described PANI / MIL-101 adopts the in-situ redox rapid polymerization method, the aniline monomer concentration is 0.05-5mol / L, the MIL-101 accounts for 10-50% of the aniline monomer mass fraction, and the rapid reaction is carried out at room temperature for 30min. .

[0025] 2. Weigh the raw materials of PVDF, acetylene black and composite materials according to the mass ratio of 0.5~1:1:8~8.5, grind them evenly, add them in sequence, and ultrasonically disperse them in N-methyl-2-pyrrolidone to make the concentration 10mg / mL slurry, then coated on carbon fiber cloth to form electrodes;

[0026] 3. Preparation of flexible supercapacitors.

[0027] Specifically, the prepared two electrodes are immersed in ...

Embodiment 1

[0030] 1) Preparation of electrode material PANI / MIL-101: under the condition of vacuuming, firstly, 0.2mol / L aniline and MIL-101, which accounts for 10% of the mass fraction of aniline monomer, were mixed and adsorbed in a three-necked flask, and then aniline di The polymer was dissolved in a small amount of ethanol and added to a three-necked flask, followed by adding hydrochloric acid, stirring evenly, and sonicating for 10 minutes. At the same time, the amount of ammonium persulfate and aniline was weighed and dissolved in hydrochloric acid. Both were precooled for 20 minutes at the same time. The hydrochloric acid solution was quickly poured into the aniline solution, and the reaction was rapidly stirred for 30 min. The product was then purified and dried with absolute ethanol and deionized water.

[0031] 2) Preparation of electrodes: using an area of ​​1 × 2 cm 2 The hydrophilic carbon cloth is used as the current collector, and the electrode material is made of slurry...

Embodiment 2

[0034]1) Preparation of electrode material PANI / MIL-101: Under the condition of vacuuming, 0.2mol / L aniline and MIL-101, which accounts for 20% of the mass fraction of aniline monomer, were mixed and adsorbed in a three-necked flask, and then aniline di The polymer was dissolved in a small amount of ethanol and added to a three-necked flask, followed by adding hydrochloric acid, stirring evenly, and sonicating for 10 minutes. At the same time, the amount of ammonium persulfate and aniline was weighed and dissolved in hydrochloric acid. Both were precooled for 20 minutes at the same time. The hydrochloric acid solution was quickly poured into the aniline solution, and the reaction was rapidly stirred for 30 min. The product was then purified and dried with absolute ethanol and deionized water.

[0035] 2) Preparation of electrodes: using an area of ​​1 × 2 cm 2 The hydrophilic carbon cloth is used as the current collector, and the electrode material is made of slurry and coate...

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Abstract

The invention discloses a polyaniline-based MOF nanocomposite flexible supercapacitor and a preparation method thereof. MIL-101 is one of MOF materials with excellent acid-resistance stability. The method provided by the invention comprises the steps that a PANI / MIL-101 composite material is prepared; the PANI / MIL-101 composite material, acetylene black and polyvinylidene fluoride (PVDF) are uniformly dispersed in N-methyl-2-pyrrolidone (NMP) in a certain proportion to form a slurry, and the slurry is coated on carbon fiber cloth to form electrodes; a gel electrolyte is used to symmetrically stack two electrodes, and the middle space is separated by a diaphragm; and the electrodes are packaged to prepare the flexible supercapacitor. The specific capacity of the electrode material is up to1197 F / g. The prepared supercapacitor has only 10% attenuation of the specific capacity after 1000 times of bending. The cyclic stability test 10000 cycles can maintain more than 90% of the specific capacity. Four supercapacitors are connected in series to light up a 1.8V red LED. The flexible supercapacitor prepared by the invention has good flexibility and electrochemical performance, and has agood application prospect in the aspects of flexible electronic devices and energy storage.

Description

technical field [0001] The invention belongs to the technical field of energy, and in particular relates to a preparation method of a bendable flexible energy storage element. Further, the invention relates to a polyaniline-based MOF nanocomposite flexible supercapacitor and a preparation method. Background technique [0002] In recent years, as electronic products become more and more portable, flexible and wearable, it has become a research hotspot to develop their corresponding energy storage components to make them small, light, flexible and high-performance. Traditional energy storage devices such as batteries and capacitors are basically rigid and rigid, and most of them cannot be bent and folded, and the energy density, power density and charge-discharge cycle stability need to be improved. Supercapacitors have advantages over batteries and traditional capacitors in terms of energy storage due to their better cycle life and higher power density. [0003] There are ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/48H01G11/84H01G11/86B82Y30/00
Inventor 邵亮王乾马忠雷许娟李莹邓富泉
Owner SHAANXI UNIV OF SCI & TECH
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