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A kind of all-solid wound supercapacitor and preparation method thereof

A supercapacitor and solid electrolyte technology, applied in the field of electrochemical energy storage, can solve the problems that supercapacitors cannot achieve large bending and tight winding, and the area of ​​supercapacitor self-supporting carbon nanomaterial-based flexible electrode materials is difficult to expand. Achieve the effects of improving safety and stability, portability, controllability, and capacity

Active Publication Date: 2016-08-03
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] A technical problem to be solved by the present invention is to solve the technical problem that the existing supercapacitors cannot realize large-scale bending and tight winding, and propose an all-solid-state wound supercapacitor and its preparation method, which can simultaneously meet the requirements of portability, simplicity, Development requirements and market expansion requirements of portable electronic products
[0009] Another technical problem to be solved by the present invention is to solve the problem that the existing supercapacitors cannot realize the problem that the area of ​​the self-supporting carbon nanomaterial-based flexible electrode material is difficult to expand, and propose an all-solid-state winding supercapacitor and its preparation method, which realizes Controllability of electrode area and thickness
[0010] In order to solve the problem that existing supercapacitors cannot achieve large bending and tight winding, the present invention provides a supercapacitor, including: first electrodes, first interlayers, and second electrodes that are arranged in an overlapping order and are tightly wound and the second separator, wherein the first separator separating the first electrode and the second electrode adopts a flexible solid electrolyte, and the solid electrolyte uniformly penetrates into the pores of the electrode material, making the combination of the electrode and the solid electrolyte more tightly and firmly , not easy to fall off; the first electrode and the second electrode are made of carbon nanomaterials or carbon nanocomposites; the second interlayer is located on the outermost side, using a solid electrolyte and / or an insulating layer

Method used

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  • A kind of all-solid wound supercapacitor and preparation method thereof
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  • A kind of all-solid wound supercapacitor and preparation method thereof

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preparation example Construction

[0070] The preparation method of above-mentioned supercapacitor, may comprise the steps:

[0071] Step 1, placing the second electrode on the second interlayer;

[0072] If the second interlayer adopts a solid electrolyte, before the step 1, it also includes: hot dripping the solid electrolyte on the surface of the substrate, and using the glue-spinning method to uniform the glue to obtain a layer of uniform and flat solid electrolyte surface, as second compartment;

[0073] If the second interlayer adopts a solid electrolyte and an insulating layer, before the step 1, it also includes: first laying a layer of insulating film on the surface of the substrate, and then thermally dripping the solid electrolyte onto the insulating film. , as a second compartment.

[0074] In step 1, the second electrode may be spread on a roller, and the second electrode may be transferred onto the second separator by a roll transfer printing method.

[0075] If the electrode is composed of a p...

Embodiment 1

[0108] 1) In this embodiment, both the first electrode and the second electrode are carbon nanotube films directly grown by the floating catalytic chemical vapor deposition method, and the thickness of the selected film is about 120 nm. Since the area of ​​the film obtained by this method is limited by the size of the growth chamber, for the convenience of spreading, the carbon nanotube film was uniformly cut into 2×4cm 2 , to get multiple small pieces of carbon nanotube thin film; cut another two pieces of 5×15mm 2 Carbon nanotube film strips are ready for use.

[0109] 2) Take two polytetrafluoroethylene rollers (5cm in diameter and 3cm in length), wet the cylindrical surface of each roller with ethanol, and then spread the small pieces of carbon nanotube film end to end on the cylindrical surface of the roller superior. Each roller uses 4 small pieces of carbon nanotube film, and the paving area is 2×15cm 2 .

[0110] If the electrode of the device design needs to be th...

Embodiment 2

[0120] 1) First, cut the carbon nanotube film directly grown by the floating catalytic chemical vapor deposition method to obtain multiple pieces with an area of ​​2.5×4.5cm 2 Carbon nanotube thin film slices with a thickness of about 200nm; cut another two pieces of 5×15mm 2Carbon nanotube film strips are ready for use. Then, two small pieces of carbon nanotube film were spread on a hollow polytetrafluoroethylene (PVDF) rectangular frame (2.0×4.0cm 2 ) on both sides; then immerse the carbon nanotube film in an aqueous solution containing 0.1M aniline monomer, 0.25M sulfuric acid, and 0.25M sodium sulfate, and in-situ polymerize polyaniline with a constant potential method, with a potential of 0.8V and a time of 30 seconds; remove the carbon nanotube / polyaniline composite film from the PVDF rectangular frame, cut and retain the composite film in the PVDF frame, and obtain two pieces of 2.0×4.0cm 2 Porous carbon nanotube / polyaniline composite thin film pellets. Repeatedly, a...

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Abstract

The invention discloses an all-solid-state winding type supercapacitor and a production method thereof. The supercapacitor comprises a first electrode, a first interlayer, a second electrode, and a second interlayer which are sequentially arranged and wind firmly an integral film, wherein the second interlayer is an outermost layer; and the electrodes employs carbon nanomaterials or carbon nanocomposite materials. In the invention, a concrete scheme and an implementation process are provided for expanding and controlling the electrode size, so that an accommodation area of the electrode is substantially increased and a capacity of the supercapacitor is increase. The first interlayer employs a solid electrolyte to separate the adjacent electrodes, and the solid electrolyte can flatten a surface and bond electrodes during a device assembling process so that the electrodes and the interlayers are bonded in a firmer manner; and the outermost second interlayer can employ the solid electrolyte or an insulating layer. The supercapacitor is made entirely by flexible materials and has the advantages of being good in elasticity, extrusion-resistant, collision-resistant, simple, and portable; and application of the supercapacitor is widened.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to an all-solid wound supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitor (also known as electrochemical capacitor) is a new type of energy storage device, which combines the dual characteristics of capacitors and batteries. It has the characteristics of high energy density, high power density, high charge and discharge efficiency, long life, and safety. As a high-power pulse power supply, it has broad application prospects in many fields such as data memory storage systems, communication equipment, and hybrid power supplies for electric vehicles. The governments of various countries have invested a lot of manpower and material resources, and regard the supercapacitor project as a national key research and development project. With the development of portable electronic devices, the traditional supercapacitor assembly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/32H01G11/36H01G11/56H01G11/84
CPCY02E60/13
Inventor 周维亚涂敏栾平山张楠解思深
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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