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Preparation method for slurry of super capacitor

A technology for supercapacitors and pastes, applied in the manufacture of hybrid/electric double-layer capacitors, etc., can solve the problems of easy delamination, uniformity effect of supercapacitors, uneven distribution of active materials, etc., to achieve uniformity and stability improvement, The effect of improving the micro-short-circuit phenomenon and shortening the preparation time

Inactive Publication Date: 2013-11-20
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersion of various raw materials in the slurry prepared by this process method is not good. Due to the existence of small particle size raw materials such as activated carbon and conductive carbon, the slurry is doped with a lot of agglomerated large particles, and there are many air bubbles in the slurry. The stability is not good, and the slurry is easy to delaminate after being placed for a period of time.
As a result, the supercapacitor products prepared by using the slurry have large particles on the pole piece that penetrate the diaphragm and are short-circuited and scrapped, which reduces the product qualification rate; the uneven distribution of active materials causes the capacity of each supercapacitor to be different, which affects the uniformity of the supercapacitor. Caused a great impact, thus affecting the promotion of the use of supercapacitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the ratio of 90% activated carbon, 5% conductive carbon black, and 5% PTFE binder, add 900g of activated carbon, 30g of conductive carbon black, and 50g of PTFE binder into 2000g of solvent NMP, and put the above substances into the double planet Stir in a type mixer for 0.5h to prepare the initial slurry, transfer the initial slurry to an emulsifier with a rotation speed of 1000rpm, and a shear grinding gap of 0.03mm for emulsification, and emulsify once to prepare a stable and uniform supercapacitor slurry with a viscosity of 15000cp , Transfer the slurry to the turnover tank to vacuumize and remove air bubbles and wait for coating.

Embodiment 2

[0020] According to the ratio of 90% activated carbon, 5% conductive carbon black, and 5% PTFE binder, add 900g of activated carbon, 50g of conductive carbon black, and 50g of PTFE binder into 2000g of solvent NMP, and put the above substances into the double planet Stir in a type mixer for 1 hour to prepare the initial slurry, transfer the initial slurry to an emulsifier with a rotation speed of 1200rpm, and a shear grinding gap of 0.05mm for emulsification, and emulsify twice to prepare a stable and uniform supercapacitor slurry with a viscosity of 10000cp , Transfer the slurry to the turnover tank to vacuumize and remove air bubbles and wait for coating.

Embodiment 3

[0022] According to the ratio of 90% activated carbon, 5% conductive carbon black, and 5% PTFE binder, add 900g of activated carbon, 50g of conductive carbon black, and 50g of PTFE binder into 2000g of solvent NMP, and put the above substances into the double planet Stir in a type mixer for 0.5h to prepare the initial slurry, transfer the initial slurry to an emulsifier with a rotation speed of 800rpm, and a shear grinding gap of 0.02mm for emulsification, and emulsify five times to prepare a stable and uniform supercapacitor slurry with a viscosity of 8000cp Material, the slurry is transferred to the turnover tank to vacuumize and remove air bubbles and wait for coating.

[0023] The slurry prepared by the preparation method of the present invention is coated on the current collector to prepare the electrode sheet of the supercapacitor electrode, and after rolling and cutting, the positive electrode sheet, the negative electrode sheet, and the diaphragm paper are wound into a ...

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Abstract

The invention relates to a preparation method for slurry of a super capacitor. The method comprises the steps of a) initial slurry preparation, wherein active carbon, conductive carbon, binder and solvent are placed in a double-planet mixer with a constant temperature system and stirred and mixed for 0.5 to 5 hours; b) slurry emulsification, wherein the prepared initial slurry is transferred into an emulsifying machine for emulsification; and c) vacuum bubble removal, wherein the emulsified slurry is transferred into a turnover tank with a rotating disk to carry out vacuum bubble removal. The preparation method for the slurry of the super capacitor can uniformly mix different substances in the super capacitor, is excellent in uniformity and high in stability, is not likely to be layered, and is free of bubbles.

Description

technical field [0001] The invention relates to a preparation method of slurry, in particular to a preparation method of supercapacitor slurry. Background technique [0002] Supercapacitor is a new type of 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, it has an electrostatic capacity of up to farads or even tens of thousands of farads. , so it has the characteristics of high energy density. At the same time, it also has the advantages of fast charging and discharging, high energy conversion efficiency, good temperature characteristics (-40 ° C ~ 70 ° C), long cycle life and environmental protection, so its technology has been widely valued by countries all over the world and can be widely used. Wind power, solar power, digital, automotive, medical, health, power electronics, communications, energy, military and other fields. ...

Claims

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Application Information

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IPC IPC(8): H01G11/86
CPCY02E60/13
Inventor 王勇张敬捧辛军委关成善宗继月
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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