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Flexible and tailorable solid super capacitor and preparation method thereof

A supercapacitor, solid-state technology, applied in the field of flexible and tailorable solid-state supercapacitors and its preparation, can solve the problems of specific capacity dependence, slow self-discharge, and great difference in specific capacity, and achieve fast and effective transmission and accumulation, long self-discharge The effect of performance, excellent flexibility and stability

Active Publication Date: 2018-01-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the flexible all-solid-state supercapacitors that have been reported use polyvinyl alcohol gel electrolytes, and the specific capacity of the obtained devices is heavily dependent on the electrode materials used, and the specific capacity varies greatly.
In addition, most of the reported all-solid-state supercapacitors based on polyvinyl alcohol electrolytes self-discharge quickly in a short time, thus, there is an urgent need to develop novel polyelectrolytes for high-performance flexible supercapacitors with slow self-discharge performance.

Method used

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  • Flexible and tailorable solid super capacitor and preparation method thereof
  • Flexible and tailorable solid super capacitor and preparation method thereof
  • Flexible and tailorable solid super capacitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] A flexible and tailorable solid-state supercapacitor based on polymer hydrogel, the preparation process is as follows figure 1 As shown, the specific steps are:

[0067] (1) Polyaniline was deposited on both sides of the 10 μm carbon nanotube film by electrochemical deposition, and 0.2mol L -1 Aniline and 0.5mol L -1 Concentrated sulfuric acid was dissolved in deionized water, and stirred evenly to obtain a sulfuric acid solution of aniline. Using a three-electrode system, using aniline sulfuric acid solution as the electrolyte, carbon nanotube film as the working electrode, saturated calomel electrode as the reference electrode, and platinum sheet as the counter electrode, the carbon nanotube / polyaniline composite film was obtained by cyclic scanning. ;

[0068] (2) The carbon nanotube film / polyaniline composite membrane obtained in step (1) is coated with polyacrylamide / lithium chloride hydrogel prepolymerization liquid by pressure difference method, and after cros...

Embodiment 2

[0073] A method for preparing a flexible and tailorable solid-state supercapacitor based on polymer hydrogel, the specific steps are:

[0074] (1) Deposit polyaniline on both sides of the carbon nanotube film by electrochemical deposition to obtain a carbon nanotube / polyaniline composite film;

[0075] (2) in step (1) the gained carbon nanotube amine composite membrane permeates the polyacrylamide / lithium chloride hydrogel pre-polymerization liquid, after cross-linking polymerization, obtains the polyacrylamide / lithium chloride hydrogel electrolyte Carbon nanotube / polyaniline composite film;

[0076] (3) Coating and polymerizing the polyacrylamide / lithium chloride hydrogel pre-polymerization solution in the middle and both sides of the carbon nanotube / polyaniline composite film obtained in step (2), after cross-linking and polymerization, the polymer water-based Flexible, tailorable solid-state supercapacitors in gels.

[0077] The thickness of the carbon nanotube film is 8 ...

Embodiment 3

[0091] A method for preparing a flexible and tailorable solid-state supercapacitor based on polymer hydrogel, the specific steps are:

[0092] (1) Deposit polyaniline on both sides of the carbon nanotube film by electrochemical deposition to obtain a carbon nanotube / polyaniline composite film;

[0093] (2) The carbon nanotube / polyaniline composite membrane obtained in step (1) is infiltrated into the polyacrylamide / lithium chloride hydrogel prepolymerization solution, and after cross-linking polymerization, the infiltrated polyacrylamide / lithium chloride hydrogel is obtained Electrolyte carbon nanotube film / polyaniline composite film;

[0094] (3) Coating and polymerizing the polyacrylamide / lithium chloride hydrogel pre-polymerization solution in the middle and both sides of the carbon nanotube film / polyaniline composite film obtained in step (2), after cross-linking and polymerization, a polymer based Flexible, tailorable solid-state supercapacitors from hydrogels.

[0095]...

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Abstract

The invention relates to a flexible and tailorable solid super capacitor and a preparation method thereof. The super capacitor uses carbon nanotube / polyaniline composite films as electrodes and a polyacrylamide / lithium chloride hydrogel system as electrolyte and a flexible substrate. The flexible and tailorable carbon nanotube / polyaniline composite electrodes are prepared by depositing polyanilineon carbon nanotube films through electrochemical deposition. The two carbon nanotube composite electrodes are isolated by polyacrylamide / lithium chloride hydrogel prepared in advance. Then, the electrodes are permeated by hydrogel pre-polymerized solution, and crosslinking polymerization is carried out, thus obtaining a flexible and tailorable solid super capacitor with high performance. Comparedwith the prior art, the volume specific capacity of the super capacitor is up to 99F cm<-3>, it takes more than 10 hours to reduce the open circuit voltage to half the original, and the super capacitor shows excellent self-discharge performance. The super capacitor obtained is very flexible, can be bent to any shape, and has no performance degradation even after 5000 times of bending. Therefore,the super capacitor has a broad application prospect in flexible and wearable electronic devices and other fields.

Description

technical field [0001] The invention relates to the technical field of flexible energy storage devices, in particular to a flexible and tailorable solid-state supercapacitor and a preparation method thereof. Background technique [0002] Flexible wearable and portable electronics have attracted great attention in the past decades, and have promising applications in flexible displays, portable sensors, detectors, etc. In order to meet the energy requirements of the above-mentioned flexible electronic devices, it is urgent to develop matching high-performance flexible energy devices. To this end, scientists have developed flexible and wearable energy conversion and storage devices such as solar cells, ion secondary batteries, and supercapacitors. Supercapacitors (also known as electrochemical capacitors or supercapacitors) have attracted much attention due to their high power density, long stability (over 106 charge-discharge cycles), fast charging characteristics, and ease o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36H01G11/48H01G11/56H01G11/84
Inventor 陈涛李惠丽吕甜李宁姚瑶刘开
Owner TONGJI UNIV
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