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Manufacture of high-voltage electrochemical capacitor

A manufacturing method and capacitor technology, applied in the direction of electrolytic capacitors, capacitors, electrode manufacturing, etc., to achieve the effects of low cost, reduced resistance, and easy production

Inactive Publication Date: 2002-04-17
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a kind of preparation method of high-voltage electrochemical supercapacitor, to overcome the defect that traditional electrochemical capacitor can only provide the working voltage of maximum 2.5V

Method used

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  • Manufacture of high-voltage electrochemical capacitor
  • Manufacture of high-voltage electrochemical capacitor
  • Manufacture of high-voltage electrochemical capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use plant material, such as wood, in an inert atmosphere, such as argon, for carbonization treatment. The treatment condition is that the treated product is immersed in molten KOH at 450 ° C for 4 hours, and then in the temperature range of 850 ° C, with ZnCl 2 As a catalyst, NaOH was used as an activator to activate for 4 hours, and then to perform secondary activation with high-temperature water vapor to obtain activated carbon materials with special structure and surface characteristics.

[0035]The porous activated carbon material prepared above is used as an electrode material, conductive graphite is used as a conductive agent, polytetrafluoroethylene resin is used as a binder, mixed according to a ratio of 75%: 20%: 5%, and dissolved in an inorganic solvent such as deionized water, and fully stirred to prepare electrode slurry.

[0036] The electrode slurry with a certain viscosity is coated on the nickel mesh collector, dried, and pressed to prepare a positive el...

Embodiment approach 2

[0040] Mineral materials, such as bituminous coal, are carbonized in an inert atmosphere such as a nitrogen atmosphere, and the processed product is immersed in molten NaOH at 480°C for 4 hours, and then treated with ZnCl in the temperature range of 880°C 2 As a catalyst, NaOH was used as an activator to activate for 4 hours, and then high-temperature water vapor was used for secondary activation to obtain activated carbon materials with special structure and surface characteristics.

[0041] The porous activated carbon material prepared above is used as the electrode material, acetylene black is used as the conductive agent, and a mixture of polytetrafluoroethylene resin and sodium carboxymethyl cellulose is used as the binder, mixed according to the ratio of 75%: 20%: 5% (poly Tetrafluoroethylene resin and sodium carboxymethyl cellulose (the proportion of the two is 3:2) is dissolved in deionized water, and fully stirred to prepare electrode slurry.

[0042] The electrode sl...

Embodiment approach 3

[0044] The preparation of the electrode material is to dry the electrode slurry, remove part of the water, use the roller machine to press it into an electrode diaphragm, and use a hydraulic press to press it together with the aluminum mesh and the copper mesh, and dry it in a vacuum oven. At the same time, the negative electrode is welded into aluminum foil on the aluminum mesh and the copper mesh as the lead-out electrode.

[0045] Select a strong alkaline substance, such as LiOH dissolved in a non-ionic solvent as the electrolyte. Glass fiber paper is selected as the separator, the electrodes and the separator are fully immersed in the electrolyte, and then the electrolyte is dried, and the conductive rubber is used as the packaging shell and electrode collector, and the conductive rubber diaphragm, electrode, insulating plastic, and separator are placed according to the figure 2 The order is stacked and placed, and the surrounding edges of the conductive rubber diaphragm ...

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Abstract

The invention discloses a method for manufacturing high voltage electro-chemical capacitor capable and relates to area of electrochemistry capacitor. The positive and negative electrodes of the capacitor are made from material of activated carbon with special structure and surface characteristic that can be prepared on current collecting substance of different metals by use one of two method: float covering and pressing film. The electrolyte is composd of KOH, LiOH, NaOH alkaline solution or Et4NBF4 / PC and Et4NBF4 / AN organic solution. Aluminum foil or conductive rubber is chosen to made the shell of electrode and the current collecting substance, being formed single-body capable of bearing external pressure. Several single-bodyies can be connected in series with higher voltage being applied. In such way, it provides certain working voltage, equivalent serial resistance lowered effectively and excellent power characteristic . Packaging shell can be made from aluminium foil or insulating plastic.

Description

technical field [0001] The invention relates to a preparation method of a high-voltage electrochemical capacitor, belonging to the field of electrochemical capacitors. Background technique [0002] Electrochemical capacitors have been widely recognized in the electronics industry for their outstanding functions and advantages. Compared with traditional capacitors, electrochemical capacitors have extremely high capacitance values, limited frequency response, high equivalent series resistance (ESR), voltage-dependent capacitance, and voltage-dependent self-discharge rate. Initially, electrochemical capacitors were used to provide high excitation energy for high-energy lasers. Today's new electrochemical capacitors can also replace nickel-cadmium batteries and lithium batteries as uninterruptible power supplies (UPS) for computers and communication systems. Large electrochemical capacitors are used in electric vehicles to provide high-current discharge during starting and bra...

Claims

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Application Information

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IPC IPC(8): H01G9/02H01G9/04H01G9/042H01G9/08H01M4/04H01M10/24
CPCY02E60/124Y02E60/10Y02E60/13
Inventor 王晓峰张熙贵解晶莹刘宇刘庆国
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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