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Colloidal electrolyte super capacitor adopting reticular diaphragm

A colloidal electrolyte and supercapacitor technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor separators, hybrid capacitor electrolytes, etc., can solve problems such as internal short circuits, excessive internal resistance, and electrolyte leakage

Active Publication Date: 2015-09-16
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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  • Colloidal electrolyte super capacitor adopting reticular diaphragm
  • Colloidal electrolyte super capacitor adopting reticular diaphragm
  • Colloidal electrolyte super capacitor adopting reticular diaphragm

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 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 7.3mg / cm 2 . The 30-mesh nylon mesh is stacked between the active carbon pole pieces used as the 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 electrodes are fully infiltrated, and the nylon mesh is filled with electrolyte sol . After the above...

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 super capacitor adopting a reticular diaphragm. The colloidal electrolyte super capacitor is characterized in that the reticular diaphragm is adopted to replace a conventional diaphragm; the reticular diaphragm is located between a positive electrode and a negative electrode, so that the positive electrode and the negative electrode can be separated from each other; and channels of positive electrode and negative electrode active materials are filled with colloidal electrolyte and are communicated with each other through holes of the reticular diaphragm, and therefore, electrolyte ion migration channels can be formed. The reticular diaphragm is adopted, and therefore, short circuit of the positive electrode and the negative electrode can be avoided, and the transfer resistance of electrolyte ions between the positive electrode and the negative electrode can be effectively decreased. Compared with a super capacitor without a diaphragm structure and colloid electrolyte, the super capacitor of the invention has the advantages of high security and diverse packaging modes; and compared with a colloidal electrolyte super capacitor adopting a conventional diaphragm such as polypropylene non-woven fabric, the colloid electrolyte super capacitor adopting the reticular diaphragm has 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, and belongs to the technical field of supercapacitors. Background technique [0002] Supercapacitor is a new type of energy storage device whose performance is 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 charge and discharge speed, high efficiency, long cycle life, wide operating temperature range, and high safety. In recent years, supercapacitors have become a new hotspot in the research and development of chemical power sources. [0003] At present, most supercapacitors on the market are packaged in aluminum-plastic film or metal casing, and use aqueous or organic electrolytes. During transportation and use, such supercapacitors are prone to shell damage; in ad...

Claims

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Application Information

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IPC IPC(8): H01G11/52H01G11/56
CPCY02E60/13H01G11/52H01G11/56H01G11/84
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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