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Preparation method of redox type gel electrolyte for all-solid-state supercapacitor

A technology of supercapacitor and gel electrolyte, applied in the direction of hybrid capacitor electrolyte, etc., can solve the problems of poor cycle performance, unusable production, obvious self-discharge effect, etc., to improve energy storage density, ensure high-rate charge and discharge, and improve Effects of Cycling Stability and Self-Discharge Performance

Active Publication Date: 2020-11-17
江西普瑞森新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, until now, the traditional PVA (polyvinyl alcohol) electrolyte has been used on the gel electrolyte, and there is no obvious breakthrough.
The specific capacity of traditional electric double layer supercapacitors (EDLC) is generally increased by adding small molecule redox substances or using pseudocapacitive materials. This kind of redox enhanced supercapacitor has poor cycle performance and obvious self-discharge effect, so it cannot be used Actual Production

Method used

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  • Preparation method of redox type gel electrolyte for all-solid-state supercapacitor
  • Preparation method of redox type gel electrolyte for all-solid-state supercapacitor
  • Preparation method of redox type gel electrolyte for all-solid-state supercapacitor

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Embodiment 1

[0035] A redox gel electrolyte (P(PDP-co-TEMPO)) with high ionic conductivity and high specific energy, which is a copolymer of an amphoteric monomer and a stable redox monomer substance, its structure is shown in figure 1 .

[0036] Further, the preparation method of P(PDP-co-TEMPO) comprises the following steps:

[0037] Step (1) Synthesis of P(PDP-co-TEMPO) copolymer: add 1.0g amphoteric monomer [3-(methacrylamido) propyl group] dimethyl (3-thio Propyl)ammonium hydroxide inner salt) and 9.0mg redox active monomer 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester and 4.0ml to Ionized water, fully stirred and dissolved, and then added 1.0 mg of 4,4'-azo (4-cyanovaleric acid) as an initiator. Freeze the reaction system with liquid nitrogen, then use a vacuum pump for 12 minutes, repeat the above steps three times, keep the system anaerobic and control the temperature at 70°C, and react for 18 hours to obtain a copolymer precursor.

[0038] Step (2) Oxidation of...

Embodiment 2

[0044] Step (1) Synthesis of P(PDP-co-TEMPO) copolymer: add 0.5g amphoteric monomer [3-(methacrylamido) propyl group] dimethyl(3-thio Propyl)ammonium hydroxide inner salt) and 4.5mg redox active monomer 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester and 2.0ml to Ionized water, fully stirred and dissolved, and then added 0.5 mg of 4,4'-azo (4-cyanovaleric acid) as an initiator. Freeze the reaction system with liquid nitrogen, then use a vacuum pump for 10 minutes, repeat the above steps three times, keep the system anaerobic and control the temperature at 60°C, and react for 12 hours to obtain a copolymer precursor.

[0045] Step (2) Oxidation of the precursor: add an appropriate amount of sodium hydroxide to the precursor solution obtained in the previous step to neutralize the solution, then add 50 mg of sodium tungstate and 6 mg of hydrogen peroxide, and react for 36 hours to obtain an oxidized The reducing active nitrogen-oxygen free radical copolymer is P...

Embodiment 3

[0050] Synthesis of step (1) P (PDP-co-TEMPO) copolymer: (1) Synthesis of P (PDP-co-TEMPO) copolymer: in the hydrochloric acid solution of 0.75M, add 2.0g amphoteric monomer [3-( Methacrylamido) propyl] dimethyl (3-thiopropyl) ammonium hydroxide inner salt) and 18.0 mg redox active monomer 2-methyl-2-acrylic acid-2,2,6, 6-Tetramethyl-4-piperidinyl ester and 8.0ml of deionized water were fully stirred and dissolved, and then 2.0mg of 4,4'-azo (4-cyanovaleric acid) was added as an initiator. Freeze the reaction system with liquid nitrogen, then use a vacuum pump for 15 minutes, repeat the above steps three times, keep the system anaerobic and control the temperature at 80°C, and react for 24 hours to obtain a copolymer precursor.

[0051] Step (2) Oxidation of the precursor: add an appropriate amount of sodium hydroxide to the precursor solution obtained in the previous step to neutralize the solution, and then add 0.2g sodium tungstate and 24mg hydrogen peroxide to react for 48...

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Abstract

The invention provides a preparation method of a redox type gel electrolyte for an all-solid-state supercapacitor, and the method comprises the following steps: synthesizing a polymer P(PDP-co-TEMPO)(([3-(methacrylamido)propyl]dimethyl(3-thiopropyl) ammonium hydroxide inner salt)-2-methyl-2-methacrylic acid-2, 2, 6, 6-tetramethyl-4-piperidyl nitric oxide copolymer) by using a free radical polymerization method; preparing P(PDP-co-TEMPO) powder by adopting a freeze-drying method, and then dissolving the obtained powder into a lithium chloride aqueous solution to form the final redox type gel electrolyte. The preparation method provided by the invention is simple in process, low in cost and high in yield, can be used for mass production, and can achieve ultrahigh electrochemical performanceand good self-discharge performance and cycle performance when being applied to an all-solid-state supercapacitor. By controlling the amount of inorganic salt lithium chloride, the ionic conductivityand the water content of the polyamphoteric gel electrolyte can be controlled.

Description

technical field [0001] The invention relates to the field of preparation of redox gel electrolytes for all-solid supercapacitors, in particular to the preparation of amphoteric and redox polyelectrolyte polymers. Background technique [0002] As an energy storage device, supercapacitors have received special attention due to their high cycling and high power density. In particular, the development of flexible electronic devices and the requirements of safety performance make the preparation of gel electrolytes for all-solid supercapacitors particularly important. However, its energy density and specific capacity are always in urgent need of improvement, and the self-discharge effect of supercapacitors has seriously affected its application range as energy storage devices. The traditional method mostly adopts the method of optimizing the electrode material to increase the specific capacity and optimize the self-discharge behavior. With the further deepening of people's under...

Claims

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Application Information

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IPC IPC(8): H01G11/56C08F220/60C08F220/34
CPCH01G11/56C08F220/606C08F220/34Y02E60/13
Inventor 彭旭赵凯张旭
Owner 江西普瑞森新能源科技有限公司
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