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A gel electrolyte supercapacitor with mesh separator

A colloidal electrolyte and supercapacitor technology, applied in the direction of hybrid capacitor separators, hybrid capacitor electrolytes, etc., can solve problems such as internal short circuit, excessive internal resistance, and electrolyte leakage.

Active Publication Date: 2017-12-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the existing liquid electrolyte supercapacitor is prone to electrolyte leakage, the colloidal electrolyte supercapacitor without a diaphragm is prone to internal short circuit, and the internal resistance of the colloidal electrolyte supercapacitor with an ordinary diaphragm is too large, and proposes a method using a mesh diaphragm. Gel Electrolyte Supercapacitor

Method used

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  • A gel electrolyte supercapacitor with mesh separator
  • A gel electrolyte supercapacitor with mesh separator
  • A gel electrolyte supercapacitor with mesh separator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Activated carbon, conductive carbon black and polytetrafluoroethylene binder are uniformly mixed in a mass ratio of 85:10:5, fully stirred and repeatedly squeezed until demulsification to obtain a plastic mixture. The resulting mixture was rolled into a sheet. The dried electrode membrane is cut, and then pressed onto the current collector foamed nickel to obtain an activated carbon electrode. The diameter of the activated carbon pole piece is 10mm, and the surface density of the active material is 7.3mg / cm 2 . The 30-mesh nylon mesh is stacked between the active carbon electrodes used as positive and negative electrodes, and then the three are put into the shell of the button capacitor. Inject polyvinyl alcohol-KOH hydrosol (the mass percentage of polyvinyl alcohol is 10%, and the concentration of KOH is 6mol / L), so that the positive and negative electrode sheets are fully infiltrated, and the nylon mesh is filled with electrolyte sol . After the above-mentioned bu...

Embodiment 2

[0033] Mix activated carbon, conductive carbon black and polytetrafluoroethylene binder uniformly according to the mass ratio of 85:10:5, stir well and repeatedly extrude until the emulsification is broken to obtain a plastic mixture. The resulting mixture was rolled into a film. The dried electrode membrane is cut, and then pressed onto the current collector foamed nickel to obtain an activated carbon pole piece. The diameter of the activated carbon pole piece is 10mm, and the surface density of the active material is 7.5mg / cm 2 . Lay the 40-mesh nylon net between the activated carbon pole pieces as the positive and negative electrodes, and then put the three into the shell of the button capacitor. Inject polyvinyl alcohol-KOH hydrosol (the mass percentage of polyvinyl alcohol is 10%, and the concentration of KOH is 6mol / L), so that the positive and negative electrodes are fully infiltrated, and the nylon mesh is filled with electrolyte sol . After the above-mentioned but...

Embodiment 3

[0036] Mix activated carbon, conductive carbon black and polytetrafluoroethylene binder uniformly according to the mass ratio of 85:10:5, stir well and repeatedly extrude until the emulsification is broken to obtain a plastic mixture. The resulting mixture was rolled into a film. After the diaphragm is dried, it is cut, and then the cut diaphragm is pressed onto the current collector foamed nickel to obtain an activated carbon pole piece. The diameter of the activated carbon pole piece is 10mm, and the surface density of the active material is 7.4mg / cm 2 . The 60-mesh nylon mesh is stacked between the positive and negative electrodes of activated carbon pole pieces, and then the three are put into the shell of the button capacitor. Inject polyvinyl alcohol-KOH hydrosol (the mass percentage of polyvinyl alcohol is 10%, and the concentration of KOH is 6mol / L), so that the positive and negative electrodes are fully infiltrated, and the nylon mesh is filled with electrolyte sol ...

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Abstract

The invention provides a colloidal electrolyte supercapacitor using a mesh diaphragm, which is characterized in that: the mesh diaphragm is used to replace the traditional diaphragm, and the mesh diaphragm is located between the positive electrode and the negative electrode to separate the positive and negative electrodes; The electrolyte fills the pores of the positive and negative electrode active materials, and communicates with each other through the mesh of the mesh separator to form the electrolyte ion migration channel. The use of a mesh diaphragm can not only avoid the short circuit of the positive and negative electrodes, but also greatly reduce the migration resistance of electrolyte ions between the positive and negative electrodes. Compared with the supercapacitor with no diaphragm structure and colloidal electrolyte, the supercapacitor is safer The advantages of high and various package forms. Compared with gel electrolyte supercapacitors using traditional separators such as polypropylene non-woven fabrics, gel electrolyte supercapacitors with mesh separators have the advantages of low internal resistance and high power density.

Description

technical field [0001] The invention relates to a colloidal electrolyte supercapacitor using a mesh diaphragm, belonging to the technical field of supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage device with performance between traditional capacitors and secondary batteries. It has the advantages of higher energy density than traditional capacitors and higher power density than secondary batteries. In addition, supercapacitors also have the characteristics of fast charging and discharging speed, high efficiency, long cycle life, wide operating temperature range and high safety. In recent years, supercapacitors have become a new focus of research and development in the field of chemical power sources. [0003] At present, most of the supercapacitors on the market are packaged in aluminum-plastic film or metal shell, and use aqueous or organic electrolytes. During transportation and use, the supercapacitor is prone to shell damage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/52H01G11/56
CPCY02E60/13
Inventor 阎景旺高兆辉姜靓李然衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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