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Supercapacitor based on heterojunction polymer gel electrolyte and its preparation method

A polymer gel, supercapacitor technology, applied in the field of energy storage devices, can solve the problems of lack of universality, limited application of supercapacitors, and small results, to suppress the self-discharge process, prolong the self-discharge time, reduce The effect of charge rearrangement

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its internal energy storage mechanism, another key bottleneck that supercapacitors are currently facing is their extremely fast (within tens of minutes or even seconds) self-discharge phenomenon, which greatly limits the application of supercapacitors.
Although some studies have tried to confine charges or charged ions in the nanopores of electrode materials to alleviate the self-discharge phenomenon of supercapacitors through the design of nanopores of electrode materials, the results have been minimal and there is no universal law.

Method used

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  • Supercapacitor based on heterojunction polymer gel electrolyte and its preparation method
  • Supercapacitor based on heterojunction polymer gel electrolyte and its preparation method
  • Supercapacitor based on heterojunction polymer gel electrolyte and its preparation method

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Embodiment 1

[0033] A supercapacitor based on a heterojunction polymer gel electrolyte, the schematic diagram of the fabricated structure is shown in figure 1 As shown, the specific steps are:

[0034] (1) Dissolve polyvinyl alcohol in deionized water under heating conditions (70°C), the mass ratio of polyvinyl alcohol to water is 1:20, keep stirring for 2 hours, add phosphoric acid with a molar concentration of 0.5mol / L after cooling And stir evenly, then add poly(4-sodium styrene sulfonate), the mass ratio of poly(4-sodium styrene sulfonate) and polyvinyl alcohol / phosphoric acid electrolyte solution is 1:10, after stirring 30min evenly, obtain obtained Described polyvinyl alcohol / phosphoric acid / poly (4-sodium styrene sulfonate) electrolyte solution;

[0035] (2) Dissolve polyvinyl alcohol in deionized water under heating conditions (70°C), the mass ratio of polyvinyl alcohol to water is 1:20, keep stirring for 2 hours, add phosphoric acid with a molar concentration of 0.5mol / L after c...

Embodiment 2

[0045] A supercapacitor based on a heterojunction polymer gel electrolyte and a preparation method thereof, the specific steps are:

[0046] (1) Dissolve polyvinyl alcohol in deionized water under heating conditions (75°C), the mass ratio of polyvinyl alcohol to water is 1:10, keep stirring for 3 hours, add phosphoric acid with a molar concentration of 1mol / L after cooling and Stir evenly, then add poly(4-sodium styrene sulfonate), the mass ratio of poly(4-sodium styrene sulfonate) and polyvinyl alcohol / phosphoric acid electrolyte solution is 1:6, after stirring for 40min evenly, the described Polyvinyl alcohol / phosphoric acid / poly(sodium 4-styrenesulfonate) electrolyte solution;

[0047] (2) Dissolve polyvinyl alcohol in deionized water under heating conditions (75°C), the mass ratio of polyvinyl alcohol to water is 1:10, keep stirring for 3 hours, add phosphoric acid with a molar concentration of 1mol / L after cooling and Stir evenly, then add polydiene dimethyl ammonium chl...

Embodiment 3

[0053] A supercapacitor based on a heterojunction polymer gel electrolyte and a preparation method thereof, the specific steps are:

[0054] (1) Dissolve polyvinyl alcohol in deionized water under heating conditions (80°C), the mass ratio of polyvinyl alcohol to water is 1:6, keep stirring for 4 hours, add phosphoric acid with a molar concentration of 1.5mol / L after cooling And stir evenly, then add poly(4-sodium styrene sulfonate), the mass ratio of poly(4-sodium styrene sulfonate) and polyvinyl alcohol / phosphoric acid electrolyte solution is 1:5, after stirring 60min evenly, obtain obtained Described polyvinyl alcohol / phosphoric acid / poly (4-sodium styrene sulfonate) electrolyte solution;

[0055] (2) Dissolve polyvinyl alcohol in deionized water under heating conditions (80°C), the mass ratio of polyvinyl alcohol to water is 1:6, keep stirring for 4 hours, add phosphoric acid with a molar concentration of 1.5mol / L after cooling And stir evenly, then add polydiene dimethyl ...

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Abstract

The invention relates to a supercapacitor based on a heterojunction polymer gel electrolyte and a preparation method thereof. The supercapacitor uses carbon nanotubes or composite films thereof as electrodes, and polyvinyl alcohol / phosphoric acid / poly(4-styrene sulfonate) Sodium acid sodium) and polyvinyl alcohol / phosphoric acid / polydiene dimethyl ammonium chloride formed heterojunction film simultaneously as a solid electrolyte and separator. Compared with the prior art, the heterojunction solid electrolyte constructed by the present invention can effectively suppress the charge rearrangement in the electric double layer and pseudocapacitive supercapacitor, and greatly prolong the self-discharge time of the supercapacitor, which is a single step in the prior art. Polymer gel electrolyte can not be achieved. Fast self-discharge is the key bottleneck faced by current supercapacitors. The present invention provides an effective method to regulate and limit the self-discharge performance of supercapacitors through the structural design of solid electrolytes, which is of great significance to the development and application of supercapacitors.

Description

technical field [0001] The invention relates to the technical field of energy storage devices, in particular to a supercapacitor based on a heterojunction polymer gel electrolyte and a preparation method thereof. Background technique [0002] As an important electrochemical energy storage device, supercapacitor has the advantages of high power density, long cycle life, fast charging speed, simple structure, etc., and can be easily prepared on various flexible substrates to obtain flexible and wearable devices. In recent years, it has attracted great attention from academia and industry. [0003] It is well known that the energy density of supercapacitors is lower than that of metal ion secondary batteries, and great progress has been made by improving the specific capacity and operating voltage window of the devices. However, due to the limitation of its internal energy storage mechanism, another key bottleneck that supercapacitors are currently facing is their extremely fa...

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 陈涛王雪
Owner TONGJI UNIV
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