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Preparation method of super capacitor electrode

A technology for supercapacitors and electrodes, which is applied in the field of preparation of electrodes for supercapacitors, can solve the problems of poor cycle life of supercapacitor monomers, low bonding strength of active materials, poor electrode uniformity, etc., and achieves high specific volume and high peeling strength. , Improve the effect of electrode specific volume

Active Publication Date: 2015-09-23
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a good uniformity, high Active material binding force and high specific volume electrode preparation method for supercapacitors

Method used

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  • Preparation method of super capacitor electrode
  • Preparation method of super capacitor electrode
  • Preparation method of super capacitor electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] After 880 grams of activated carbon and 50 grams of conductive carbon black were dry mixed with a planetary mixer, 1500 grams of solid content was added to be 2% sodium carboxymethyl cellulose aqueous solution and continued to stir for 2 hours; Ethylene emulsion and continue to stir, add 760 grams of water to adjust the viscosity of the slurry to 3820cp; use a transfer coater to evenly coat the resulting slurry on a 20μm corroded aluminum foil, with a thickness of 100μm on one side, and use a high-frequency electromagnetic induction device Heat the corroded aluminum foil at an induction frequency of 350kHz to dry the electrode, and the drying time is 30 seconds.

[0036] After the obtained electrode was rolled with a linear pressure of 4kN / cm, the water content of the pole piece was tested with an infrared moisture tester. Select some of the electrodes and use a cutter to cut the obtained electrodes into specifications of 10cm in length and 2cm in width, and use 3M doub...

Embodiment 2

[0038] After 900 grams of graphene and 30 grams of carbon nanotubes were dry-mixed uniformly with a vacuum kneader, 1500 grams of solid content was added to be 2% poly-N-vinylacetamide aqueous solution and continued to stir for 2 hours; 1 gram of styrene-butadiene rubber emulsion and continue to stir, add 600 grams of water to adjust the viscosity of the slurry to 2800cp; use a pull-type coater to evenly coat the gained slurry on a 20 μm corroded aluminum foil, with a single-side coating thickness of 120μm, use a high-frequency electromagnetic induction device to heat the corroded aluminum foil at an induction frequency of 300kHz to dry the electrode, and the drying time is 1min.

[0039] Test items and methods are the same as in Example 1, and the test results are shown in Table 1.

Embodiment 3

[0041] After dry mixing 860 grams of activated carbon fibers and 70 grams of conductive carbon black with a banbury mixer, add 1500 grams of N-methylpyrrolidone and continue to stir for 2 hours; add 80 grams of polyacrylate to the resulting mixture and continue to stir, add 520 grams of N-methylpyrrolidone adjust the viscosity of the slurry to 2530cp; the resulting slurry is evenly coated on a 20 μm corroded aluminum foil with an extrusion coater, and the corroded aluminum foil is heated with a high-frequency electromagnetic induction device at an induction frequency of 200kHz to Dry the electrode, the coating thickness on one side is 160 μm, and the drying time is 3 minutes.

[0042] Test items and methods are the same as in Example 1, and the test results are shown in Table 1.

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Abstract

The present invention relates to a preparation method of a super capacitor electrode. A coating method is used to prepare the electrode, and comprises the steps of firstly stirring an active material, a conductive agent, a dispersing agent and an olefin polymer which can be in fibration under a high temperature in a solvent into a uniform slurry, then coating the slurry on a current collector evenly, and heating the current collector in an electromagnetic induction heating manner to dry the electrode and make the olefin polymer molecules as a binder in fibration, thereby bonding the active material and the conductive agent on the current collector firmly. By the technical scheme of the present invention, the problems that the super capacitor electrode is poor in uniformity and low in specific volume, the adhesive forces of the active material and the conductive agent on the current collector are small, the cycle life of an assembled super capacitor monomer is poor, etc., can be solved effectively.

Description

technical field [0001] The invention relates to a supercapacitor assembly, in particular to a preparation method of an electrode for a supercapacitor. Background technique [0002] The electrode preparation process of electric double-layer supercapacitors usually requires the use of binders to bond active materials and conductive agents to current collectors. According to whether a solvent that wets the binder, active material, and conductive agent is introduced during the electrode preparation process, the preparation process of electrodes for supercapacitors can be divided into two types: dry processing method and coating method. [0003] Dry processing is an electrode preparation process that grinds a dry mixture of binder, active material, and conductive agent to form a self-supporting dry film. Chinese patent CN1838999 B discloses a process for preparing electrodes for supercapacitors by dry processing, including grinding dry carbon and fibrous dry binder particles, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86
CPCH01G11/86Y02E60/13
Inventor 郭义敏张显郭德超何凤荣
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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