Ultra-thin, self-supporting, flexible and all-solid-state super capacitor and manufacturing method thereof

A supercapacitor, self-supporting technology, applied in the field of electrochemical energy storage, can solve the problems of poor bonding between electrode materials and solid electrolytes, failure to achieve less than 10 μm, power and energy density attenuation, etc., to reduce overall quality and thickness, high The effect of specific capacitance and reduction of equivalent internal resistance

Active Publication Date: 2013-07-24
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is easy to achieve large-scale production, but the prepared device must rely on the substrate and cannot be self-supporting
The self-supporting carbon nanomaterial-based supercapacitor devices reported so far, the overall thickness of the device is still unable to be less than 10 μm, and the main limiting factors come from two reasons: the electrode material and the assembly process.
First of all, in these works, most of the preparation methods of electrode materials use the method of powder pressing. There is a contradiction between the thickness and porosity of the electrode materials produced by this method, making it difficult to achieve ultra-thin, or power, energy Density severely attenuated
At the same time, due to the fact that the electrode material itself prepared by the tableting method is a brittle material, the device cannot achieve flexibility or can only be bent slightly. In addition, some electrode materials need to add polymer binders during tableting, resulting in the conductivity of the electrode material. Poor, requires a metal collector to work, and additionally increases th...

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  • Ultra-thin, self-supporting, flexible and all-solid-state super capacitor and manufacturing method thereof
  • Ultra-thin, self-supporting, flexible and all-solid-state super capacitor and manufacturing method thereof
  • Ultra-thin, self-supporting, flexible and all-solid-state super capacitor and manufacturing method thereof

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preparation example Construction

[0049] The preparation method of the ultra-thin, self-supporting, flexible, all-solid-state supercapacitor of the embodiment of the present invention comprises the following steps:

[0050] 1) Firstly, the carbon nanomaterial or carbon nanocomposite electrode is prepared and pretreated: the prepared positive electrode material and negative electrode material are respectively tiled on substrates with different surface energies.

[0051] 2) Thermal drip irrigation or printing of the solid electrolyte on the positive and negative electrode materials on the surface of the substrate, after soaking, use the glue-spinning method to remove the excess solid electrolyte, and then obtain the positive electrode / solid electrolyte, negative electrode / solid electrolyte film.

[0052] 3) Lay the positive electrode / solid electrolyte and negative electrode / solid electrolyte film with the substrate symmetrically together, and after standing and drying, the device assembly is completed;

[0053...

Embodiment 1

[0062] 1) Preparation and pretreatment of electrode materials

[0063] First, the carbon nanotube film directly grown by the floating catalytic chemical vapor deposition method was cut and spread on a hollow polytetrafluoroethylene (PVDF) rectangular frame (1.8×2.5cm 2 ). Subsequently, the carbon nanotube film was immersed in an aqueous solution containing 0.01M 3,4-ethylenedioxythiophene monomer and 0.1M sodium p-toluenesulfonate, and the polycarbonate was deposited on the carbon nanotube film by the constant potential electrochemical deposition method. 3,4-ethylenedioxythiophene, polymerization potential 1V, polymerization time 40 seconds. After the deposition is completed, a carbon nanotube / polyethylenedioxythiophene composite material is obtained, wherein the poly3,4-ethylenedioxythiophene content is 85%. Subsequently, the carbon nanotube / poly-3,4-ethylenedioxythiophene composite film was removed from the PVDF rectangular frame, and spread on a polyethylene terephthalate...

Embodiment 2

[0069] 1) Preparation and pretreatment of electrode materials

[0070] First, the carbon nanotube film directly grown by the floating catalytic chemical vapor deposition method was cut and spread on a hollow PVDF rectangular frame (1.8×2.5cm 2 ). Then the carbon nanotube film was immersed in an aqueous solution containing 0.1M aniline monomer, 0.25M sulfuric acid, and 0.25M sodium sulfate, and polyaniline was electrochemically deposited using a potentiostatic method with a polymerization potential of 0.75V and a polymerization time of 30 seconds. In the prepared composite film material, the content of polyaniline is about 75wt.%. Subsequently, the obtained carbon nanotube / polyaniline composite film was transferred from the PVDF frame to a styrene (PS) substrate and a PVDF substrate for use. In this embodiment, the thickness of the carbon nanotube film is selected to be about 100 nm.

[0071] 2) Assembly of ultra-thin, self-supporting, flexible supercapacitors

[0072] This...

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Abstract

The invention discloses an ultra-thin, self-supporting, flexible and all-solid-state super capacitor and a manufacturing method of the ultra-thin, self-supporting, flexible and all-solid-state super capacitor. The super capacitor comprises a position electrode, a solid electrolyte and a negative electrode, wherein the solid electrolyte is located between the positive electrode and the negative electrode to separate the positive electrode and the negative electrode, and the solid electrolyte evenly permeates inside a porous structure of the positive electrode and a porous structure of the negative electrode. The positive electrode and the negative electrode are made of carbon nanometer materials or carbon nanometer composite materials, and the outer side of the positive electrode and the outer side of the positive electrode are not completely embedded by the solid electrolyte and can be used for collecting currents. The thickness of the super capacitor is within the range of 10 nanometers to 10 micrometers, the inner portion of the capacitor is provided with no diaphragm, the outer portion of the capacitor needs no metal current collecting electrode or encapsulation, self-supporting can be realized, and at the same time the capacitor has high specific capacitance, high power density, high energy density, long life and high stability. The super capacitor has the advantages of being superior in performance, simple in manufacturing technology, and capable of satisfying the development demands of flexible, miniature, light electronic products at the same time, and having wide application prospects.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to an ultra-thin, self-supporting, flexible, all-solid supercapacitor and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of emerging wearable electronic devices, skin electronic devices, flexible display screens and low-power biological detection devices, people urgently need new energy storage devices to realize the lightweight and miniaturization of electronic equipment. , flexible, long life and maintenance-free. Supercapacitors (also known as electrochemical capacitors), as a new type of electrochemical energy storage device, have the dual advantages of batteries and capacitors, and have the characteristics of high energy density, high power density, high charge and discharge efficiency, and long life. It is an ideal candidate technology for small and lightweight energy storage devices. With the in...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/56H01G11/86H01G11/84
CPCY02E60/13
Inventor 栾平山周维亚解思深
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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