Hydrogel electrolyte and supercapacitor thereof

A supercapacitor and hydrogel technology, applied in the field of energy storage, can solve the problems of low energy density, toxicity, and inapplicability, and achieve the effects of good safety, simplified manufacturing process, and wide use

Active Publication Date: 2021-06-04
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing energy storage materials usually use gel electrolytes. Gel electrolytes include hydrogel electrolytes and organic gel electrolytes. Organic gel electrolytes have the advantages of high energy density, but poor flexibility, toxicity, and hidden dangers; Gel electrolytes solve the toxicity problem, but suffer from poor flexibility and low energy density, and are not suitable for cold environments

Method used

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  • Hydrogel electrolyte and supercapacitor thereof
  • Hydrogel electrolyte and supercapacitor thereof
  • Hydrogel electrolyte and supercapacitor thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1, the preparation of hydrogel electrolyte

[0028] The specific preparation method of the hydrogel electrolyte, the specific method is to take the polymerized monomer of the gel electrolyte, the initiator, the high molecular polymer and water respectively, after stirring and dissolving, heat to the temperature that can initiate the polymerization and fully polymerize, and obtain the polymer of the gel electrolyte. body, and then soak the polymerized gel electrolyte polymer precursor in an aqueous solution containing an inorganic salt of a cross-linked polymer and a zinc salt, wherein the quality of the zinc salt in the solution is greater than that of the solvent water, and the high concentration of zinc in the soaking process The ions form a water-in-salt electrolyte, which effectively prevents water from being decomposed and increases the voltage window.

[0029] In the present invention, the gel electrolyte polymerizable monomer is preferably acrylamide, ...

Embodiment 2

[0041] Embodiment 2, flexible supercapacitor

[0042] The flexible supercapacitor is composed of upper, middle and lower parts. The upper part is a zinc sheet as the negative electrode, the middle part is the gel electrolyte, and the lower part is the titanium foil as the positive electrode current collector. The active material is coated on the titanium foil current collector: conductive carbon black: sticky The mass ratio of binder polyvinylidene fluoride is 8:1:1, and the active material is activated carbon.

[0043] Preferably, the negative electrode adopts a zinc sheet with a length of 2 cm and a width of 3 cm. The positive electrode was prepared by mixing 80wt% activated carbon, 10wt% carbon black and 10wt% polyvinylidene fluoride in NMP solvent, then coating the mixture on a titanium foil and drying it in a constant temperature oven at 80°C.

[0044] The electrochemical performance was measured by CHI760E electrochemical workstation of Shanghai Chenhua Company for CV c...

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Abstract

The invention discloses a hydrogel electrolyte and a supercapacitor thereof. According to the hydrogel electrolyte, under the action of an initiator, a polymeric monomer, a high-molecular polymer and a polymeric monomer in water are polymerized to form a hydrogel electrolyte polymer precursor; the hydrogel electrolyte polymer precursor is soaked in an aqueous solution containing an inorganic salt and a zinc salt which are cross-linked with a high-molecular polymer; the product has excellent mechanical strength and flexibility, does not need to add a diaphragm when being assembled into a supercapacitor, simplifies the manufacturing process, widens the application range of the voltage of the capacitor, and has practical application value.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a hydrogel electrolyte, and also to a supercapacitor made of the hydrogel electrolyte. Background technique [0002] In recent years, people's personalized demand for electronic products has driven the emergence and development of flexible electronic technology. Flexible electronic technology has changed our way of thinking and life to a certain extent, and is regarded as the most competitive and promising development in the 21st century. one of the technologies. With the development and progress of flexible electronic technology, related flexible electronic products have appeared in the fields of flexible display, implantable medical treatment, portable and wearable. Different from common traditional electronic products, flexible electronic products have the functions of bending, folding, Various novel features such as flexibility and shape deformation. Therefore, the energy supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08F251/02C08F251/00C08F220/56C08F220/06C08F220/54H01G11/56C08L51/02
CPCC08J3/075C08F251/02C08F251/00H01G11/56C08J2351/02C08F220/56C08F220/06C08F220/54Y02E60/13
Inventor 陈久存陈秋红金燕子
Owner SOUTHWEST UNIVERSITY
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