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A high working voltage super capacitor and its making method

A supercapacitor, working voltage technology, applied in capacitor manufacturing, hybrid/electric double layer capacitor manufacturing, electrolytic capacitors, etc., can solve the problem of low working voltage of supercapacitors, achieve high energy density, high power density, good cycle performance Effect

Inactive Publication Date: 2008-09-10
SHANDONG SHENGONGHAITE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the shortcoming of supercapacitor operating voltage is too low, to provide a supercapacitor with high operating voltage (3.0V ~ 3.5V), high energy density and good cycle performance

Method used

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  • A high working voltage super capacitor and its making method
  • A high working voltage super capacitor and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The present invention manufactures a cylindrical supercapacitor through the following steps:

[0053] (1) Making positive electrode slurry. Proportioning of raw materials is carried out according to the following parts by weight:

[0054] Porous activated carbon 90;

[0055] Binder polyvinylidene fluoride (PVDF) 5;

[0056] Conductive agent acetylene carbon black 5;

[0057] Production method: first dissolve 5 parts by weight of polyvinylidene fluoride (PVDF) in 50 parts by weight of nitrogen-methylpyrrolidone (NMP), and then mix 90 parts by weight of porous activated carbon, 5 parts by weight of acetylene carbon black and Mixing, stirring and dispersing are carried out to prepare uniform positive electrode slurry.

[0058] (2) Making negative electrode slurry. Proportioning of raw materials is carried out according to the following parts by weight:

[0059] Negative electrode active material Porous activated carbon 90;

[0060] Binder polyacrylic acid and its de...

Embodiment 2

[0079] Referring to Example 1, the coin supercapacitor of the present invention is manufactured through the following method steps.

[0080] (1) positive electrode slurry and negative electrode slurry carry out raw material proportioning according to following weight parts:

[0081] Porous activated carbon 93;

[0082] Acetylene carbon black 5;

[0083] PTFE 2;

[0084] Preparation method: 93 parts by weight of porous activated carbon and 5 parts by weight of acetylene carbon black are mixed and stirred to obtain uniformly dispersed mixed powder.

[0085] (2) According to the requirements of the electrode size of the manufactured supercapacitor, it is made of 0.5-1.0 g / cm by a punching machine 3 Density powder.

[0086] (3) Cut the isolation film according to the size requirements of the isolation film;

[0087] (4) Laminating a piece of supercapacitor positive electrode sheet, a piece of supercapacitor negative electrode sheet, and a piece of porous isolation film togeth...

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Abstract

The invention provides a high-working voltage super capacitor and the manufacturing method, which include: a positive polarizing electrode and a negative polarizing electrode, a multihole isolating film and an electrolyte; the electrolyte is a high-working voltage electrolyte, the electrolyte salt can be ring quaternary alkylphosphonium salt and the solvent of the electrolyte can be ethylene carbonate (EC) or propylene carbonate (PC) and so on. The electrolyte concentration is 0.5-5.0 mol / L; the electrolyte has an electrochemical window of more than 4.6v. The invention adopts the high-working voltage super capacitor electrolyte which has a wider electrochemical window; the high-working voltage super capacitor made by utilizing the high electrochemical decomposition voltage can not only keep the characteristics of high power density and better cycle performance, but also have higher working voltage (3.0v-3.5v) and higher energy density.

Description

technical field [0001] The invention relates to a supercapacitor and a manufacturing method thereof, in particular to a high working voltage supercapacitor containing a high working voltage electrolyte and a manufacturing method thereof. Background technique [0002] Supercapacitor is a new type of environmentally friendly energy storage device between traditional capacitors and secondary batteries that has emerged in recent years. While retaining the characteristics of high power density of traditional capacitors, its electrostatic capacity can reach farads or even thousands of farads. , so it also has the characteristics of high energy density. At the same time, the supercapacitor also has the advantages of fast charging and discharging speed, high charging and discharging efficiency, long life, good safety, and environmental friendliness. It is a new, practical and efficient energy storage device. . [0003] According to different energy storage principles, supercapacito...

Claims

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Application Information

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IPC IPC(8): H01G9/022H01G9/035H01G9/038H01G9/042H01G9/058H01G9/04H01G9/02H01G13/00H01M10/00H01M14/00H01G11/30H01G11/60H01G11/62H01G11/84
CPCY02E60/13
Inventor 李青海吴曲勇
Owner SHANDONG SHENGONGHAITE ELECTRONICS TECH
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