Folding-resistant one-dimensional fibrous flexible energy storage device and preparation method thereof

A fibrous, folded technology, used in the manufacture of hybrid/electric double-layer capacitors, electrical components, structural parts, etc., can solve the problem that the separator and the electrode material cannot be tightly adsorbed together, the specific capacity of the energy storage device is reduced, and the structure is compact. Type difference and other problems, to achieve the effect of improving folding resistance and electrochemical stability, improving folding resistance and electrochemical stability, reducing size and assembly cost

Active Publication Date: 2019-07-05
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, commercial separators usually have the disadvantages of large thickness and low porosity, resulting in the obtained fiber supercapacitors, which are not only large in size and poor in compact structure, but on the other hand, manual assembly is cumbersome and costly, and the formation The internal resistance of the battery is large and the specific capacity is low
In addition, the manually coated diaphragm and the electrode material cannot be tightly adsorbed together. After repeated folding, the diaphragm and the electrode material are easily cracked or even fall off, resulting in a large decrease in the specific capacity of the energy storage device or even short circuit damage.

Method used

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  • Folding-resistant one-dimensional fibrous flexible energy storage device and preparation method thereof
  • Folding-resistant one-dimensional fibrous flexible energy storage device and preparation method thereof
  • Folding-resistant one-dimensional fibrous flexible energy storage device and preparation method thereof

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preparation example Construction

[0074] Specifically, a method for preparing a folding-resistant one-dimensional fibrous flexible energy storage device includes the following steps:

[0075] 1) Precipitation method, hydrothermal method, vacuum filtration method, chemical vapor deposition method, electroplating method or ice bath method are used to prepare positive and negative electrodes; the material forming the positive electrode is a flexible fiber material with high conductivity and electrochemical activity at the same time For example, the material forming the positive electrode can be a combination of non-conductive flexible fibers and conductive agents and / or conductive flexible fibers or flexible conductive fibers and electrochemically active substances (wherein, the source of the non-conductive flexible fibers includes cotton fabrics, wool fabrics, Any one or a combination of two or more of silk fabrics, hemp fabrics, polyester fabrics, and acrylic fabrics; the conductive agent includes any one or two...

Embodiment 1

[0084] A method for preparing a folding-resistant fibrous supercapacitor, comprising:

[0085] 1) Using carbon nanotube film as conductive substrate, carbon nanotube / MnO was prepared by electroplating method 2 The composite film is then twisted into a flexible fiber as the positive electrode; the carbon nanotube film is also used as the substrate, and the carbon nanotube / polyaniline flexible film is prepared by electroplating as the negative electrode;

[0086] 2) In-situ electrospinning technology is used to in-situ coat the surface of the positive electrode to form a polyacrylonitrile nanofiber membrane as a separator, and the thickness of the separator is 4-5 μm;

[0087] 3) Preparation of PVA / H 3 PO 4 electrolyte;

[0088] 4) Vacuum-immerse the negative electrode and the positive electrode covered with a separator in the electrolyte at 60°C for 2 hours, and then dry it at 60°C for half an hour to form a solid electrolyte on the surface of the negative electrode and the ...

Embodiment 2

[0095] A method for preparing a folding-resistant fibrous supercapacitor, comprising:

[0096] 1) Using carbon nanotube film as conductive substrate, carbon nanotube / MnO was prepared by electroplating method 2 The composite film is then twisted into a flexible fiber as the positive electrode; the carbon nanotube film is also used as the substrate, and the carbon nanotube / polyaniline flexible film is prepared by electroplating as the negative electrode;

[0097] 2) In-situ electrospinning technology is used to in-situ coat the surface of the positive electrode to form a polyacrylonitrile nanofiber membrane as a separator, and the thickness of the separator is 4-5 μm;

[0098] 3) Preparation of PVA / LiCl electrolyte;

[0099] 4) Vacuum-immerse the negative electrode and the positive electrode covered with a separator in the electrolyte at 60°C for 2 hours, and then dry it at 60°C for half an hour to form a solid electrolyte on the surface of the negative electrode and the positi...

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Abstract

The invention discloses a folding-resistant one-dimensional fibrous flexible energy storage device and a preparation method thereof. The preparation method comprises the following steps: at least by adopting an electrostatic spinning mode or a 3D printing mode, a first nano-fiber membrane used as a diaphragm on a surface of a first electrode in situ is formed, and the first nano-fiber membrane isused to wrap the first electrode; and the first electrode provided with the diaphragm in a wrapped way is assembled and combined with matched electrolyte and a second electrode to form the flexible energy storage device. According to the invention, the nano-fiber membrane is wrapped on the electrode of the flexible energy storage device in situ by adopting the electrostatic spinning way, the 3D printing way, and so on, so that the structure and the composition height of the membrane are controllable, and the membrane has very strong adsorbability and high flexibility; and especially, after theflexible energy storage device is repeatedly folded, the membrane can still be tightly combined with the electrode, so that the problem of short circuit caused by mutual contact of the electrodes canbe prevented, and the folding resistance and the electrochemical stability of the flexible energy storage device are greatly improved.

Description

technical field [0001] The invention relates to a flexible energy storage device, in particular to a folding-resistant one-dimensional fibrous flexible energy storage device and a preparation method thereof, belonging to the technical field of new energy. Background technique [0002] With the rapid development of science and technology and the improvement of economic consumption level, people's demand for portable, flexible, wearable and foldable smart electronic devices continues to increase. The development of light, thin, highly flexible and foldable energy storage devices that can provide energy has become a research hotspot in the current academic and industrial circles. Compared with simple energy devices, fiber-shaped supercapacitors can be conveniently and safely woven into woven Wearable products, realizing the mass production of smart wearable products, thus becoming one of the most potential energy storage devices. [0003] At present, a large number of fibrous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/52H01G11/78H01G11/84H01M2/16H01M10/058H01M50/44
CPCH01G11/52H01G11/78H01G11/84H01M10/058H01M50/44Y02E60/10Y02P70/50
Inventor 张慧超张永毅曹玉芳李清文
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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