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A polyimide capacitor battery and its manufacturing method

A technology of polyimide and capacitor batteries, which is applied in the manufacture of hybrid capacitor electrodes, capacitor-type half-cells, primary or secondary half-cells, and hybrid/electric double-layer capacitors, and can solve the high-performance requirements of capacitor products Large-scale production, unsatisfactory energy density and power density, and short cycle life of capacitor batteries have achieved the effects of shortened production time, high drying temperature, and long cycle life

Active Publication Date: 2011-12-21
SHENZHEN HIFUTURE ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy density and power density of this type of organic hybrid supercapacitor are not ideal, the electrochemical stability is poor, the thermal stability is poor, and the operating temperature range is small, and the cycle life of the capacitor battery is short, which cannot meet the current requirements for capacitor batteries; , the current method of producing this type of capacitor is cumbersome, the work efficiency is low, and it cannot meet the high performance requirements of capacitor products and the requirements of mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] (1) Preparation of positive electrode sheet: first mix lithium ion intercalation compound, porous carbon material, conductive agent, and binder to make a slurry, then coat it on the positive electrode current collector, dry, roll, and cut , Vacuum drying to prepare a positive electrode sheet;

[0045] (2) Preparation of negative electrode sheet: firstly, the modified graphite, porous carbon material, and binder are mixed to form a slurry, and then coated on the negative electrode current collector, and prepared by drying, rolling, cutting, and vacuum drying into a negative plate;

[0046] (3) Assembly: The prepared positive and negative electrodes are stacked or wound into batteries, put into aluminum-plastic film, aluminum shell, plastic shell or steel shell, then sealed and injected into a non-aqueous organic solvent Electrolyte containing lithium ions.

[0047] The current collector of the positive electrode sheet is aluminum foil or aluminum mesh with a thickness ...

Embodiment 1

[0050] The making of positive plate: the LiMn that total amount is 500g 2 o 4 , activated carbon, conductive carbon black, and PVDF are mixed in a mass ratio of 45%: 45% : 5% : 5%, mixed with NMP (N-methylpyrrolidone), and then coated on an aluminum foil with a thickness of 20 μm ( Coating weight gain: 140g / m 2 ), dried at 110°C, rolled, cut into pieces (size: 100*154*0.135mm), and vacuum-dried at 130°C for 24 hours to make positive electrodes.

[0051] The making of the negative plate: the modified graphite, porous activated carbon, and PVDF with a total amount of 500g are mixed in a mass ratio of 45:45:10, adjusted into a slurry with NMP, and then coated on a copper foil with a thickness of 16 μm (coating Weight gain: 90g / m 2 ), dried at 110°C, then rolled and cut into pieces (size: 100*154*0.09mm 2 ), dried in vacuum at 130°C for 24 hours, and made into a negative electrode sheet.

[0052] Polyimide is used as the separator, and the positive electrode (22 pieces), the ...

Embodiment 2

[0056] The making of positive plate: the LiMn that total amount is 500g 2 o 4 , activated carbon, conductive carbon black, and PVDF are mixed according to the mass ratio of 20:70:5:5, mixed with NMP to make a slurry, and then coated on an aluminum foil with a thickness of 20 μm (the coating weight gain is: 140g / m 2 ), dried at 120°C, rolled, cut into pieces (size: 100*154*0.135mm), and vacuum-dried at 120°C for 24 hours to make positive electrodes.

[0057] The making of negative plate: the modified graphite that total amount is 500g, porous activated carbon, PVDF are mixed by mass ratio is 45:45:10, is adjusted into slurry with NMP, then coating thickness is on the copper foil of 16 μm (coating Weight gain: 90g / m 2 ), dried at 120°C, then rolled and cut into pieces (size: 100*154*0.09mm 2 ), vacuum-dried at 120° C. for 24 hours, and then made into a negative electrode sheet.

[0058] Polyimide is used as the separator, and the positive electrode (22 pieces), the separator...

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Abstract

The present invention specifically relates to a polyimide capacitance battery and a manufacturing method thereof. The polyimide capacitance battery of the present invention is obtained by manufacturing a positive electrode and a negative electrode, and then combining the positive and negative electrodes into the capacitance battery, which consists of the positive electrode, the negative electrode, a polymer membrane therebetween, and an electrolyte, wherein the positive electrode material is a mixture of a lithium-ion insertion compound and a porous carbon material, the negative electrode material is a mixture of modified graphite and a porous activated carbon material, the polymer membrane is a polyimide membrane, and the electrolyte is an electrolyte containing a lithium ion compound and an organic solvent. The polyimide capacitance battery of the present invention can be widely applied in the fields of electric automobile, electric tools, solar energy storage, wind energy storage, portable appliances and the like.

Description

[0001] technical field [0002] The invention belongs to the technical field of capacitors and batteries, and relates to supercapacitors, in particular to a polyimide capacitor battery and a manufacturing method thereof. Background technique [0003] Supercapacitor is a new type of electrochemical energy storage device between traditional capacitors and batteries. Compared with traditional capacitors, it has higher energy density, and its electrostatic capacity can reach thousands of farads to 10,000 farads. Compared with batteries, it has higher High power density and long cycle life, so it combines the advantages of traditional capacitors and batteries, and is a chemical power source with broad application prospects. It has the characteristics of high specific capacity, high power, long life, wide working temperature limit, and maintenance-free. [0004] According to different energy storage principles, supercapacitors can be divided into three categories: electric doubl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/02H01G9/042H01G9/035H01M50/414H01M50/491
CPCH01G11/06H01M4/587H01M12/005H01M10/0525H01M4/625H01M4/133H01M2/1653H01M4/131H01M10/0587Y02E60/122H01M2/162Y02T10/7011Y02E60/10Y02P70/50H01M50/44H01G11/50H01G11/86H01G11/38H01G11/46Y02T10/70H01M50/414H01M50/491H01M14/00
Inventor 吕晓义王琦桑玉贵匡晓明任金生
Owner SHENZHEN HIFUTURE ELECTRIC
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