Hydrogel electrolyte thin film, and preparation method and application therefor

A technology of electrolyte film and hydrogel, which is applied in the manufacture of hybrid capacitor electrolytes and hybrid/electric double layer capacitors. Effect of bending resistance and improvement of magnification performance

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

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Problems solved by technology

[0004] In order to overcome the shortcomings of existing physical hydrogel electrolytes that are difficult to balance high water content and excellent mechanical properties, the present invention proposes a chemically cross-linked self-supporting hydrogel electrolyte film with simple process and low cost, its preparation method and use

Method used

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  • Hydrogel electrolyte thin film, and preparation method and application therefor
  • Hydrogel electrolyte thin film, and preparation method and application therefor
  • Hydrogel electrolyte thin film, and preparation method and application therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0041] First add 1g of polyvinyl alcohol to 10mL containing 0.5molL -1 In the aqueous solution of sulfuric acid, make the content of polyvinyl alcohol 0.1gmL -1 , heated to 95° C. for 1 hour under electromagnetic stirring until the solution became clear, and a mixed solution of the polymer matrix and the aqueous electrolyte solution was obtained. Then, the mixed solution was cooled to 5 degrees Celsius. Add 2ml glutaraldehyde aqueous solution into the mixed solution, the volume ratio of the glutaraldehyde aqueous solution is 5%, stir for 20s, and quickly pour the mixed solution into a Φ90mm plastic round watch glass, and the mixed solution loses fluidity after about 10s , to complete gelation. The film was peeled off to obtain a hydrogel electrolyte film, and the thickness of the film was measured to be 1 mm by a thickness gauge. The self-supporting film as Figure 4 shown. Based on the total amount of the hydrogel electrolyte film, the content of the polymer matrix is ​​...

Embodiment 2

[0043] First add 0.3g polyvinyl alcohol to 10mL containing 2molL -1 In the aqueous solution of sulfuric acid, make the content of polyvinyl alcohol be 0.03gmL -1 , heated to 95° C. under electromagnetic stirring, and kept for 1 hour until the solution became clear, and a mixed solution of the polymer matrix and the aqueous electrolyte solution was obtained. Then, the mixed solution was cooled to 1°C. Add 2ml of glutaraldehyde aqueous solution into the mixed solution, the volume percentage of the glutaraldehyde aqueous solution and the mixed solution is 5%, stir for 60s, and quickly pour the mixed solution into a Φ90mm glass round watch glass for about 10s After the mixed solution loses fluidity, gelation is complete. The film is peeled off to form a hydrogel electrolyte film. A thickness gauge measures the thickness of the film to be 1 mm. Based on the total amount of the hydrogel electrolyte film, the content of the polymer matrix is ​​2% by weight, and the content of the...

Embodiment 3

[0045] First add 2g polyvinyl alcohol to 4mL containing 0.01molL -1 In the aqueous solution of sulfuric acid, make the content of polyvinyl alcohol be 0.5gmL -1 , heated to 95° C. under electromagnetic stirring, and kept for 1 hour until the solution became clear, and a mixed solution of the polymer matrix and the aqueous electrolyte solution was obtained. Then, the above mixed solution was cooled to 1°C. Add 2ml of glutaraldehyde aqueous solution into the above mixed solution, the volume ratio of glutaraldehyde aqueous solution is 0.4%, stir for 5s, and quickly pour the mixed solution into a Φ90mm plastic round watch glass, after about 10s, the mixed solution loses fluidity, Gelation is complete. The film was peeled off to form a hydrogel electrolyte film, and the film thickness measured by a thickness gauge was 500 μm. Based on the total amount of the hydrogel electrolyte film, the content of the polymer matrix is ​​20% by weight, and the content of the aqueous electrolyt...

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Abstract

A hydrogel electrolyte thin film is disclosed. The hydrogel electrolyte thin film comprises cross-linked macromolecular matrix materials and an electrolyte water solution; the macromolecular matrixes are mutually connected through chemical crosslinking to form space net structures; the electrolyte water solution is filled in the gaps of the space net structures; the macromolecular materials are poly (vinyl alcohol) or gelatin; and the electrolyte water solution is acid or salt electrolyte water solution. The hydrogel electrolyte thin film is prepared by a adopting a chemical crosslinking-casting film forming method or a chemical crosslinking-blade coating film forming method. The thin film is used for the gel electrolyte of flexible supercapacitors.

Description

technical field [0001] The invention relates to an electrolyte film and its preparation method and application. Background technique [0002] The performance of electrochemical energy storage devices (such as supercapacitors, lithium-ion batteries, etc.) is mainly determined by the electrode materials and electrolytes. The current research on flexible supercapacitors mainly focuses on obtaining high-performance flexible electrodes, such as various self-supporting flexible film electrodes or film electrodes supported by flexible substrates based on carbon nanomaterials (carbon cloth, carbon nanotubes, graphene, etc.) related composite materials. However, the electrolyte is also a key factor in determining the performance of electrochemical devices. Especially in flexible supercapacitors, the performance of the electrolyte will directly affect the electrochemical energy storage performance of the device and its mechanical flexibility. According to the form of existence, ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/56H01G11/84
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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