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Preparation method of high-strength self-healing hydrogel electrolyte, flexible supercapacitor assembled by high-strength self-healing hydrogel electrolyte and preparation method of flexible supercapacitor

A technology of supercapacitors and hydrogels, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrolytes, etc., can solve problems such as irreversible and reconstructed mechanical strength, and achieve improved capacitor performance, excellent electrochemical properties, and improved The effect of tensile properties

Active Publication Date: 2021-09-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems existing in the background technology, the present invention aims at the problems that the chemical gel electrolyte used in most flexible supercapacitors cannot be restored and reconstructed after being damaged, and the mechanical strength of the physical gel electrolyte is weak, etc., and prepares a large High-strength physical gel electrolytes that facilitate repair and reconstruction under load and deformation

Method used

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  • Preparation method of high-strength self-healing hydrogel electrolyte, flexible supercapacitor assembled by high-strength self-healing hydrogel electrolyte and preparation method of flexible supercapacitor
  • Preparation method of high-strength self-healing hydrogel electrolyte, flexible supercapacitor assembled by high-strength self-healing hydrogel electrolyte and preparation method of flexible supercapacitor
  • Preparation method of high-strength self-healing hydrogel electrolyte, flexible supercapacitor assembled by high-strength self-healing hydrogel electrolyte and preparation method of flexible supercapacitor

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Embodiment 1

[0059] In this example, it was found through experiments that in the poly(methacrylamide-co-acrylic acid) hydrogel electrolytes prepared by different mole fractions of methacrylamide and acrylic acid, the optimal molar ratio of methacrylamide and acrylic acid The score ratio is 7:13. Such as figure 1 Shown, the preparation method of the poly(methacrylamide-co-acrylic acid) hydrogel electrolyte that the molar fraction ratio of described methacrylamide and acrylic acid is 7:13 is as follows:

[0060] (1) Dissolve methacrylamide and acrylic acid in deionized water, the molar ratio of methacrylamide and acrylic acid is 7:13, then add a small amount of potassium persulfate, the amount of potassium persulfate accounts for methacrylamide and acrylic acid 1% of the total amount of substances, and then the mixed solution was fully stirred on a magnetic stirrer.

[0061] (2) in the solution of step (1), pass into the argon gas of 30min, exhaust the dissolved oxygen inside, obtain suc...

Embodiment 2

[0091] The poly(methacrylamide-co-acrylic acid) hydrogel electrolyte obtained in Example 1 was cut into a size of 30 mm×18 mm. The mask plate is covered on the surface of the cut poly(methacrylamide-co-acrylic acid) hydrogel electrolyte, and a layer of slurry is coated on the surface of the mask plate with graphene slurry to form an electrode. When the graphene solidifies Finally, a layer of silver-silver chloride paste is coated on its surface as a current collector, the mask plate is torn off, and the silver-silver chloride paste is solidified at normal temperature to obtain the following: Figure 7 The interdigitated electrodes shown, and then lead out two wires at the positive and negative poles of the electrodes. Finally, a layer of polyacrylate tape is pasted on the upper and lower surfaces of the supercapacitor for encapsulation, and the obtained Figure 9 The shown flexible supercapacitor with hydrogel as electrolyte.

[0092] Such as Figure 10 Shown is the physica...

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Abstract

The invention discloses a preparation method of a high-strength self-healing hydrogel electrolyte, a flexible supercapacitor assembled by the high-strength self-healing hydrogel electrolyte and a preparation method of the flexible supercapacitor. The method comprises the following steps: dissolving methacrylamide, acrylic acid and potassium persulfate in deionized water to form a prepolymer solution; introducing argon into the prepolymer solution, injecting the solution into a mold, heating and polymerizing the mold in a constant temperature box, taking out the mold after polymerization, and soaking the mold in deionized water; soaking the poly (methacrylamide-co-acrylic acid) hydrogel in the salt solution until the poly (methacrylamide-co-acrylic acid) hydrogel is in a swelling equilibrium state; designing a snakelike interdigital electrode structure, and printing to form a mask plate; and cutting into the same size, covering a mask plate, coating graphene slurry and silver-silver chloride slurry, leading out two wires, and pasting an adhesive tape for packaging to obtain the flexible supercapacitor. A poly (methacrylamide-co-acrylic acid) hydrogel electrolyte film provided by the invention has the advantages of high strength, flexibility and self-healing, and the flexible supercapacitor has the advantages of high strength, stretchability and bendability.

Description

technical field [0001] The present invention relates to a method for preparing a hydrogel electrolyte and a flexible supercapacitor and method thereof, in particular to a method for preparing a high-strength self-healing physical hydrogel electrolyte and a flexible supercapacitor assembled with the electrolyte and its preparation method. Background technique [0002] Supercapacitor is a new type of energy storage device whose electrochemical performance is between that of batteries and traditional capacitors. Its power density is higher than that of batteries, and its energy density is higher than that of traditional capacitors. It has short charging and discharging time, high power density, long service life, and environmental protection. , saving energy and other advantages, it has great application prospects in the fields of smart grid, new energy vehicles, transportation, smart meters, electronic products, national defense, communications and so on. [0003] In recent y...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/56C08J3/075C08J7/02C08J7/00C08L33/02H01G11/56H01G11/84
CPCC08F220/06C08J3/075C08J7/02C08J7/00H01G11/56H01G11/84C08J2333/02C08F220/56Y02E60/13
Inventor 田野吴化平陈欢钱强强戚杭程
Owner ZHEJIANG UNIV OF TECH