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A kind of preparation method of gel polymer electrolyte

A gel polymer and electrolyte technology, applied in the field of electrochemistry, can solve the problems of reducing open circuit voltage, maintaining for several hours or even shorter time, and achieving the effects of preventing diffusion, low cost and simple preparation method

Active Publication Date: 2021-03-16
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this type of supercapacitor is disconnected from the charging circuit, due to the existence of self-discharge, its open-circuit voltage will gradually decrease, so that its energy storage can only last for a few hours or even a shorter time. Therefore, how to improve the self-discharge phenomenon of the capacitor is the current A key question we urgently need to address

Method used

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  • A kind of preparation method of gel polymer electrolyte

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Embodiment 1

[0026] A method of preparing a gel polymer electrolyte comprising the steps of:

[0027] Step 1, the preparation of the raw material:

[0028] (a) mix the polyvinyl alcohol base with water at a mass ratio of 1:10, stirred at 80 ° C to completely dissolve, resulting in a mixed uniform polyvinyl alcohol gel base solution;

[0029] (b) 1-butyl-3-methylimidazole and carbon nanotubes were added to water, and ultrasonic dispersion was performed to give ionic liquid brominated 1-butyl-3-methylimidazole and carbon nanotubes. The dispersion liquid, wherein the concentration of the ionic liquid is 5 mol / L, the concentration of the carbon nanotubes is 0.5 mg / mL;

[0030] (c) Lithium sulfate was dissolved in water, configured as a lithium sulfate solution having a concentration of 1 mol / L;

[0031] Step 2, in the polyvinylcyl gel base solution obtained in 10 ml of step 1 (a), 1-butyl-liquid brominated 1-butyl-3-methylimidazole and carbon nanotubes obtained in 10 ml of step 1 (b) were ad...

Embodiment 2

[0036] A method of preparing a gel polymer electrolyte comprising the steps of:

[0037] Step 1, the preparation of the raw material:

[0038] (a) mixing the polyethylene glycol matrix with water at a mass ratio of 1: 5, stirred at 90 ° C to completely dissolve, resulting in a mixed uniform polyethylene glycol gel matrix solution;

[0039] (b) The ionic liquid iodinated 1,3-dimethylimidazole and carbon nanotubes were added to water, and ultrasonic dispersion was subjected to ionic liquid iodinated 1,3-dimethylimidazole and a dispersion of carbon nanotubes. The concentration of the ionic liquid was 1 mol / L, the concentration of the carbon nanotubes was 0.1 mg / ml;

[0040] (c) Solubidate lithium sulfate in water, configured as a lithium sulfate solution having a concentration of 0.5 mol / L;

[0041] Step 2, in the polyethylene glycol gel base solution obtained in 30 ml of step 1 (a), 1,3-dimethylimidazole and carbon nanotubes obtained in 15 ml of step 1 (b) were added to the po...

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Abstract

A preparation method of gel polymer electrolyte disclosed in the invention includes dissolve polymer matrix in water, adding dispersion of halide ionic liquid and carbon nanotube, adding lithium sulfate solution, removing excess wat, and preparing gel polymer electrolyte with redox activity. The preparation method of the gel polymer electrolyte of the invention is simple, and the self-discharge phenomenon of the supercapacitor can be effectively reduced. The invention also discloses the application of the prepared gel polymer electrolyte in a supercapacitor, in particular an active electrolyteenhanced supercapacitor.

Description

Technical field [0001] The present invention relates to the field of electrochemical techniques, and more particularly to a method of preparing a gel polymer electrolyte, and the obtained gel polymer electrolyte is suitable for supercapacitors, especially in active electrolyte enhanced supercapacitors. Background technique [0002] The supercapacitor is composed of electrodes, electrolytes, collectors, and diaphragm. It is a new type of electrochemical energy storage device, which has its own advantages, such as high power density, fast charging speed and cycle life, and thus become current research hotspots. one. However, the energy density of the supercapacitor is low compared to the lithium ion battery. [0003] In order to improve the energy density of the supercapacitor, an efficient and easy way to increase its application is to add redox active substances in the electrolyte, producing additional capacitors, and the capacitor obtained by using this method is referred to as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/56H01G11/84
CPCH01G11/56H01G11/84Y02E60/13
Inventor 范乐庆吴季怀
Owner HUAQIAO UNIVERSITY
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