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A kind of biaxially stretchable supercapacitor and preparation method thereof

A supercapacitor and electrode technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc. Stretch recovery performance, easy to achieve, simple process effect

Active Publication Date: 2017-11-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since pre-deformed electrodes or wires can only store strain in one direction, supercapacitors with this type of structure can only be stretched in one direction, but not in two directions or in multiple directions, making it difficult to meet the application requirements of wearable, integrated and smart electronics.

Method used

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  • A kind of biaxially stretchable supercapacitor and preparation method thereof
  • A kind of biaxially stretchable supercapacitor and preparation method thereof
  • A kind of biaxially stretchable supercapacitor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0056] By adopting the invention, a planar bidirectional stretchable supercapacitor is prepared.

[0057] Firstly, the carbon nanotube film is prepared as the electrode material of the biaxially stretchable supercapacitor by gas-phase flow catalytic reaction method. The carbon nanotube film is 2.0 cm wide and 100 nm thick. The carbon nanotubes in the film are mainly double-walled, and the diameter of the carbon nanotubes is 7nm. Carbon nanotubes combine with each other to form bundles, bifurcate and connect with each other to form a network. The network pore size distribution ranges from 5nm to 5μm. The length of carbon nanotubes and carbon nanotube bundles is more than 1μm, and the aspect ratio is more than 100. Such as image 3 A scanning electron microscope image (S-4800, Hatchi, Japan) of the carbon nanotube network is shown. The carbon nanotube membrane is defined as the membrane length along the spinning direction, and defined as the membrane width perpendicular to th...

Embodiment 2

[0061] By adopting the invention, a bidirectional stretchable supercapacitor with a sandwich sandwich structure is prepared.

[0062] The preparation methods of carbon nanotube film, elastic matrix and gel electrolyte are the same as in Example 1. The thickness of the carbon nanotube film is 100nm, and the thickness of the PDMS matrix is ​​0.5mm. The specific steps are: use the carbon nanotube film as an electrode, spread it evenly on the elastic substrate, connect the current collector with a conductive material at one end of the electrode, and evenly coat a layer of gel electrolyte on the surface; repeat the above steps; The tube film is stacked on top of each other, and the gel electrolyte between the two electrode films is combined with light pressure. A certain distance is kept between the two electrodes, and the two-way stretchable supercapacitor with a sandwich sandwich structure is prepared by standing at room temperature for 48 hours. The thickness of the gel electro...

Embodiment 3

[0064] The experimental method and steps are the same as those in Example 1, except that the two carbon nanotube film electrodes have a rectangular periodic structure. The specific steps are: evenly spread the carbon nanotube film on the elastic substrate, use a wooden toothpick to cut the middle of the carbon nanotube film along a rectangular broken line, and divide the carbon nanotube film into two asymmetrically conjugated comb-shaped films as two Electrode, the electrode film has 5 rectangular teeth, tooth width 2mm, tooth length 5mm, the tooth length direction is along the film width direction, and the distance between the two electrodes is 1mm. Connect one end of the two film electrodes to the copper foil as a current collector with conductive silver paste. A layer of gel electrolyte is evenly coated on the surface and between the two carbon nanotube membrane electrodes, and left to cure at room temperature for 24 hours. The thickness of the gel electrolyte layer is 45 μ...

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Abstract

The invention discloses a two-way stretchable supercapacitor and a preparation method thereof. The supercapacitor is composed of carbon nanotube film electrodes, elastic polymer matrix and gel electrolyte, wherein the carbon nanotube film electrodes have an interconnected network structure. The carbon nanotube film electrode material is flexible, deformable and stretchable, and endows the supercapacitor with bidirectional stretchability. The bidirectionally stretchable supercapacitor provided by the present invention can be a planar structure or a sandwich sandwich structure. The supercapacitor prepared by the invention can be vertically stretched by 30%-100% in two directions in the plane, and maintain stable electrochemical performance, and the supercapacitor also has reciprocating stretching performance. The preparation method of the bidirectionally stretchable supercapacitor provided by the present invention is simple and easy to realize, and can realize mass production, and is used in various fields such as wearable electronics, electronic skin, and intelligent integrated devices.

Description

technical field [0001] The invention discloses a bidirectionally stretchable supercapacitor and a preparation method thereof, specifically belonging to the technical field of supercapacitors. Background technique [0002] In order to adapt to the development trend of portable, wearable, integrated and intelligent electronic devices, people gradually pay attention to and develop electronic devices with stretchable properties. Supercapacitors have excellent properties such as high specific capacitance, power density, and high cycle life, and are essential energy storage systems for many electronic devices. Supercapacitors with tensile properties can be used in wearable devices, electronic skin, intelligent robots, and portable integrated devices. [0003] Traditional supercapacitors use metal sheets as current collectors and films made of carbon or metal oxide powders as active electrode materials. Two metal current collectors support the active electrode film, and a liquid e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/36H01G11/78H01G11/56H01G11/84H01G11/86
CPCY02E60/13
Inventor 李亚利康艳茹郗帅鹏曲盛祥
Owner TIANJIN UNIV
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