Flexible super capacitor and preparation method thereof

A supercapacitor and flexible technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve problems such as mutual detachment, device performance degradation, and interlayer contact deterioration, and achieve high unit area The effect of specific capacitance, simplified preparation process, and good flexibility and bending resistance

Active Publication Date: 2015-12-16
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of multi-layer structure tends to cause poor interlayer contact or even detachment from each other due to stress when it is bent multiple times, resulting in device performance degradation.

Method used

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

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preparation example Construction

[0046] The preparation method of described flexible supercapacitor comprises the following steps:

[0047] 1) Firstly, polyvinyl alcohol is added into dilute sulfuric acid aqueous solution, and the content of polyvinyl alcohol is 5%-20%. Heat to 95° C. with stirring, and maintain the temperature until the solution becomes clear to obtain a mixed solution of polyvinyl alcohol and dilute sulfuric acid aqueous solution. After the mixed solution was cooled, 2 mL of 5% glutaraldehyde aqueous solution was added and stirred, and then the mixed solution was poured into a round watch glass, and the gelation was completed after the mixed solution lost fluidity. The film is peeled off to obtain a hydrogel electrolyte film.

[0048] 2) The hydrogel electrolyte film prepared in step 1) is placed in a solution containing a conductive polymer monomer, a dopant and an oxidizing agent, and stirred and reacted for 1-48 hours at a temperature of -10°C to 25°C to obtain Conductive polymer compo...

Embodiment 1

[0056] (1) Preparation of polyvinyl alcohol hydrogel film: first add 1g of polyvinyl alcohol polymer to 15mL containing 0.5molL -1 In an aqueous solution of sulfuric acid, heat to 95° C. under electromagnetic stirring and keep for 1 hour until the solution becomes clear to obtain a mixed solution of polyvinyl alcohol and aqueous sulfuric acid. Then, the above mixed solution was cooled to 5°C. Add 2ml of glutaraldehyde aqueous solution with a content of 5% volume ratio to the above mixed solution, stir for 20s, and quickly pour the mixed solution into a Φ90mm plastic round watch glass. After about 10s, the mixed solution loses its fluidity and gelation is complete. . At this time, the film can be peeled off to form a hydrogel electrolyte film. The thickness of the film was measured to be 2 mm with a thickness gauge. The appearance of the hydrogel electrolyte film is as follows Figure 2a shown.

[0057] (2) Preparation of integrated conductive polymer-polyvinyl alcohol com...

Embodiment 2

[0061] (1) Preparation of polyvinyl alcohol hydrogel film: first add 1.5g of polyvinyl alcohol polymer to 15mL containing 0.5molL -1 In an aqueous solution of sulfuric acid, heat to 95° C. under electromagnetic stirring and keep for 1 hour until the solution becomes clear to obtain a mixed solution of polymer and electrolyte solution. Then, the above solution was cooled to 1 °C. Add 2ml of glutaraldehyde aqueous solution with a content of 5% by volume to the above mixed solution and stir for 50s, and quickly pour the mixed solution into a Φ90mm round watch glass. After about 10s, the mixed solution loses fluidity and gelation is completed. The film was peeled off to form a hydrogel electrolyte film with a thickness of 2mm.

[0062] (2) Preparation of integrated conductive polymer-polyvinyl alcohol composite hydrogel with a sandwich structure: the concentration to 40mL is 1molL -1 HClO 4 Add aniline monomer ( Sinopharm Chemical Reagent Co., Ltd. production, analytically pu...

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Abstract

Provided is a flexible super capacitor. Two current collectors are covered on the upper and lower surfaces of a composite hydrogel film; and packaging layers wraps the current collectors and the composite hydrogel film. The composite hydrogel film is integrated by two electrodes and middle electrolyte; and the upper and lower surfaces of the composite hydrogel film are conductive polymer layers serving as the electrodes respectively, and the middle layer thereof is a hydrogel layer serving as the electrolyte. The two current collector layers are covered on the two sides of the electrode-electrolyte composite film respectively, and the formed whole body is packaged in the packaging layers. The preparation method of the flexible super capacitor is characterized by, to begin with, preparing the polyvinyl alcohol hydrogel film; then, preparing the conductive polymer-polyvinyl alcohol composite hydrogel film having a sandwich structure; preparing the current collectors on the upper and lower surfaces of the conductive polymer-polyvinyl alcohol composite hydrogel film; and finally, carrying out packaging.

Description

technical field [0001] The invention relates to a supercapacitor and a preparation method thereof. Background technique [0002] In recent years, with the continuous emergence of wearable smart electronic devices, the corresponding energy storage devices have also put forward performance requirements of small size, light weight, flexibility and even rollability. However, the research progress of flexible energy storage systems is relatively slow. A supercapacitor, also known as an electrochemical capacitor, is an energy storage element with the advantages of high power density, high safety, wide temperature range and long cycle life. [0003] Flexible supercapacitors refer to flexible energy storage devices that can still work in the state of bending, twisting or even stretching, especially suitable for wearable electronic devices. Generally speaking, the performance of supercapacitors depends on the electrode materials, electrolyte and device structure. Among them, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56H01G11/48H01G11/26H01G11/84
CPCY02E60/13
Inventor 王凯张熊孙现众马衍伟
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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