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Super capacitor and preparation method thereof

A Farad capacitor and electrolyte technology, applied in the field of capacitors, can solve problems such as Farad capacitors not working properly

Inactive Publication Date: 2010-09-22
ZHUZHOU RIWANG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the embodiment of the present invention provides a farad capacitor and its preparation method to solve the problem that the farad capacitor cannot work normally in a low temperature environment. The technical solution is as follows:

Method used

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  • Super capacitor and preparation method thereof
  • Super capacitor and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0028] a) Take 90g of activated carbon, 10g of carbon black and 10g of polyvinylidene fluoride and mix them with N-methylpyrrolidone solvent to obtain a slurry;

[0029] b) Use a coater to coat the slurry on aluminum foil to make pole pieces, and then press and cut the pole pieces to obtain positive and negative electrodes;

[0030] c) Winding the positive and negative plates and the diaphragm to form a Faraday capacitor core package, and immersing the Faraday capacitor core package in an electrolyte after drying treatment; the solvent of the electrolyte is PC with a volume ratio of 5:95 And AN, the solute is Et with a concentration of 1mol / L 4 NBF 4 ; Finally, seal and make a farad capacitor.

[0031] The water content in the electrolyte of this embodiment is less than 20 ppm.

Embodiment 2

[0033] a) Take 90g of activated carbon, 10g of carbon black and 10g of polyvinylidene fluoride and mix them with N-methylpyrrolidone solvent to obtain a slurry;

[0034] b) Use a coater to coat the slurry on aluminum foil to make pole pieces, and then press and cut the pole pieces to obtain positive and negative electrodes; to obtain positive and negative electrodes;

[0035] c) Winding the positive and negative plates and the diaphragm to make a Faraday capacitor core package, and immersing the Faraday capacitor core package in electrolyte after drying treatment; the solvent of the electrolyte is PC with a volume ratio of 10:90 And AN, the solute is Et with a concentration of 1mol / L 4 NBF 4 ; Finally, seal and make a farad capacitor.

[0036] The water content in the electrolyte of this embodiment is less than 20 ppm.

[0037] Take the farad capacitor prepared in this example and test the charge and discharge characteristics in a low temperature environment of -55°C to obtain figure ...

Embodiment 3

[0039] a) Take 90g of activated carbon, 10g of carbon black and 10g of polyvinylidene fluoride and mix them with N-methylpyrrolidone solvent to obtain a slurry;

[0040] b) Use a coater to coat the slurry on aluminum foil to make pole pieces, and then press and cut the pole pieces to obtain positive and negative electrodes;

[0041] c) Winding the positive and negative plates and the diaphragm to make a Faraday capacitor core package, and immersing the Faraday capacitor core package in an electrolyte after drying; the solvent of the electrolyte is PC with a volume ratio of 20:80 And AN, the solute is Et with a concentration of 1mol / L 4 NBF 4 ; Finally, seal and make a farad capacitor.

[0042] The water content in the electrolyte of this embodiment is less than 20 ppm.

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Abstract

The embodiment of the invention provides a super capacitor and a preparation method thereof. Electrolyte of the super capacitor provided by the invention adopts the mixture of propylene carbonate and acetonitrile the volume ratio of which is 5-20:80-95 as a mixed solvent of the electrolyte. The super capacitor adopts tetraethylammonium tetrafluoroborate as a solute. The electrolyte has low melting point, thus, the super capacitor cannot have phenomenon of electrolyte solidification at low temperature, has high electric conductivity and fulfills the aim of normally working at low temperature.

Description

Technical field [0001] The invention relates to the technical field of capacitors, in particular to a Farad capacitor and a preparation method thereof. Background technique [0002] Farad capacitors, also known as ultra-large-capacity capacitors or electrochemical capacitors, are a new type of energy storage device between traditional capacitors and batteries. Farah capacitors have larger capacity and higher energy density than traditional capacitors; compared with batteries, they have higher power density and longer cycle life, and can realize high current charge and discharge. Farah capacitors have important application markets in aerospace, military, automotive, communications, instrumentation, consumer electronics, and electric toys. [0003] Farad capacitors are divided into two categories: electric double layer capacitors and electrochemical capacitors. The electric double layer capacitors can be divided into liquid double layer capacitors and solid double layer capacitors a...

Claims

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Application Information

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IPC IPC(8): H01G9/155H01G9/038H01G11/60H01G11/84
Inventor 刘建清
Owner ZHUZHOU RIWANG ELECTRONICS TECH
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