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Super-capacitor pole piece with low internal resistance and manufacturing method thereof

A technology for supercapacitors and manufacturing methods, applied in the manufacture of hybrid/electric double layer capacitors, capacitors, electrolytic capacitors, etc., can solve the problems of low energy density of supercapacitors, achieve good application prospects, shorten mixing time, and reduce internal resistance Effect

Inactive Publication Date: 2012-09-19
长沙亚科新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the charge stored in the supercapacitor is very small, this will lead to a low energy density of the supercapacitor

Method used

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  • Super-capacitor pole piece with low internal resistance and manufacturing method thereof
  • Super-capacitor pole piece with low internal resistance and manufacturing method thereof
  • Super-capacitor pole piece with low internal resistance and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] A metal aluminum mesh with a width of 300mm and a thickness of 0.1mm is used as the current collector of the electrode active material, wherein the width of the mesh area is 260mm, and a 20mm non-porous area is reserved on each side. The metal aluminum mesh is treated as follows: add a strong basic anionic surfactant, use ultrasonic technology to decontaminate the surface of the current collector for 1.5 minutes, wash it with secondary deionized water, and then vacuum dry it at 80°C for 10 minutes , and then use a fluorine-containing surfactant to modify the surface of the current collector for 4 minutes.

[0028] When preparing the electrode active material slurry, first weigh 20g of polyvinylidene fluoride PVDF and dissolve it in 200g of N-methylpyrrolidone (NMP), stir it to fully dissolve, then perform ultrasonic treatment for 3min, and then weigh 20g of Super- P Conductive carbon black, weigh 200g of activated carbon as electrode active material and fully perfo...

Embodiment example 2

[0031] Replace the conductive carbon black super-P in the implementation case 1 with conductive graphite KS-6. The conditions of slurry mixing, pole piece fabrication, battery assembly and testing are the same as those in comparative case 1. 10A charge and discharge, the internal resistance of the supercapacitor is 1.3mΩ, and the electrostatic capacity is 2100F.

[0032]

Embodiment example 3

[0034] The conductive carbon black super-P in Example 1 was replaced by a mixture of conductive graphite KS-6 and conductive carbon black, and the mass sum of the two remained unchanged. The conditions of slurry mixing, pole piece fabrication, battery assembly and testing are the same as those in comparative case 1. 10A charge and discharge, the internal resistance of the supercapacitor is 1.0mΩ, and the electrostatic capacity is 2200F.

[0035]

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Abstract

The invention discloses a super-capacitor pole piece with low internal resistance and a manufacturing method thereof, and belongs to the field of energy source material technology and related technologies. The super-capacitor pole piece with low internal resistance is characterized in that a metal mesh is used as an electrode current collector and the ultrasonic wave technology is used for performing pollution cleaning treatment and corrosion treatment on the surface of the current collector for 1-5 minutes respectively. With the use of the ultrasonic wave technology for dispersion treatment on the difficultly dispersed conductive carbon black Super-P, the conductive carbon black is uniformly distributed between the electrode active materials. A special fluorine-containing surfactant is added during the ultrasonic wave treatment process in order to enrich some organic-functional group on the surface of the current collector, and thus the compatibility among the pole piece current collector, the binder and the electrolyte solution is enhanced. Besides, in the preparation process of electrode slurry, different components in the slurry are uniformly mixed with each other by optimizing the material adding order and mixing the materials by the ultrasonic wave technology. The cracking problem on the surface of the pole piece during the preparation process of the pole piece of the super-capacitor is effectively solved in the invention, and the internal resistance of the super-capacitor is reduced effectively.

Description

technical field [0001] The invention relates to a processing method of a low internal resistance supercapacitor electrode material, in particular to a processing method of a current collector and a processing sequence of material mixing, and belongs to the related field of energy material technology. Background technique [0002] Supercapacitors (supercapacitors), also known as double layer electrochemical capacitors (double layer electrochemical capacitors). Supercapacitors store electrical energy by physically separating positive and negative charges and storing polarized electrolytes on electrodes. There is no electrochemical reaction in the electricity system, and the supercapacitor is highly reversible for energy storage. At the same time, a supercapacitor can also be regarded as two non-reactive plates separated by an electrolyte solution, and energy is stored by applying a voltage to the plates. When a voltage is applied to the plates, the positive electrode attract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G11/86
CPCY02E60/13
Inventor 刘继波张耀伟黄浩宇
Owner 长沙亚科新能源科技有限公司
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