Method for manufacturing positive pole plate of lithium-ion capacitor and lithium-ion capacitor using same

A production method and lithium ion technology, applied in capacitor electrodes, capacitor parts, liquid electrolytic capacitors, etc., can solve problems such as large differences in specific gravity, difficulty in slurry coating, and difficulty in forming a stable and uniform slurry. The effect of unstable slurry, easy mass production and easy operation

Inactive Publication Date: 2010-09-22
DONGGUAN AMPEREX TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing electrode slurry, the specific gravity of porous carbon material or conductive polymer and lithium-rich compound (such as lithium cobaltate) is very different, it is difficult to form a stable and uniform slurry, making slurry coating difficult, so it is not suitable for large-scale industrial production

Method used

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  • Method for manufacturing positive pole plate of lithium-ion capacitor and lithium-ion capacitor using same
  • Method for manufacturing positive pole plate of lithium-ion capacitor and lithium-ion capacitor using same
  • Method for manufacturing positive pole plate of lithium-ion capacitor and lithium-ion capacitor using same

Examples

Experimental program
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Effect test

specific Embodiment Embodiment 1

[0029] The preparation of lithium-ion capacitor positive plate: special activated carbon for supercapacitor (1800m 2 / g) and conductive agent SuperP, adhesive polyvinylidene fluoride (PVDF) according to the mass ratio of 87:3:10 to make a slurry, coated on the current collector aluminum foil and dried at 120 ° C, the coating amount is 6.51 mg / cm 2 ; Lithium cobaltate, conductive agent SuperP, and binder PVDF are mixed uniformly at a mass ratio of 95:2.5:2.5 to make a certain viscosity lithium-ion battery positive electrode slurry, which is coated on the current collector aluminum foil coated with a layer of activated carbon. Its coating amount is 4.13mg / cm 2 , after drying at 120°C, cold pressing is carried out; the positive electrode sheet prepared according to the above process is baked at a high temperature of 180°C for 40 minutes, and after edge trimming, cutting, and striping, a lithium ion capacitor meeting the requirements is made Positive sheet.

[0030] Preparation...

Embodiment 2

[0034] The preparation of lithium-ion capacitor positive plate: special carbon fiber (2100m 2 / g) and conductive agent SuperP, binder PVDF according to the mass ratio of 87:3:10 to make a slurry, coated on the current collector aluminum foil and dried at 120 ° C, the coating amount is 12.53mg / cm 2 ; Mix lithium manganate, conductive agent SuperP, and binder PVDF according to the mass ratio of 95:2.5:2.5 to make a certain viscosity lithium ion battery positive electrode slurry, and coat it on the current collector aluminum foil coated with a layer of carbon fiber , coating amount is 6.68mg / cm 2 , after drying at 120°C, cold pressing is carried out; the positive electrode sheet prepared according to the above process is baked at a high temperature of 180°C for 40 minutes, and after trimming, cutting, and slitting, a lithium-ion capacitor meeting the requirements is made Positive sheet.

[0035] Preparation of lithium-ion capacitor negative electrode sheet: soft carbon, conduct...

Embodiment 3

[0038] The preparation of lithium-ion capacitor positive plate: special activated carbon for supercapacitor (2300m 2 / g) and conductive agent SuperP, binder PVDF according to the mass ratio of 87:3:10 to make a slurry, coated on the current collector aluminum foil and dried at 120 ° C, the coating amount is 8.75mg / cm2 ; Mix lithium iron phosphate, conductive agent SuperP, and binder PVDF according to the mass ratio of 95:2.5:2.5 to make a certain viscosity lithium ion battery positive electrode slurry, and coat it on the current collector aluminum foil coated with a layer of activated carbon , coating amount is 5.16mg / cm 2 , after drying at 120°C, cold pressing is carried out; the positive electrode sheet prepared according to the above process is baked at a high temperature of 180°C for 40 minutes, and after trimming, cutting, and slitting, a lithium-ion capacitor meeting the requirements is made Positive sheet.

[0039] Preparation of lithium-ion capacitor negative electrod...

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PUM

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Abstract

The invention discloses a method for manufacturing a positive pole plate of a lithium-ion capacitor, comprising the following steps: 1) coating size containing super capacitor active materials on an aluminum foil current collector, and drying; 2) coating positive pole size of a lithium ion battery on the aluminum foil current collector containing super capacitor active materials; and 3) drying, cold pressing, drying again, cutting into pieces and stripping to prepare the positive pole plate of the lithium-ion capacitor. The method for manufacturing positive pole plates of lithium-ion capacitors is easily operated, overcomes the shortcomings of unstable size when the positive pole materials of the lithium ion battery and the active materials of the super capacitor active materials are mixed, and is easy for batch production. In addition, the invention also discloses the positive pole plate of a lithium-ion capacitor and the lithium-ion capacitor using the same.

Description

technical field [0001] The invention relates to a lithium ion capacitor, in particular to a method for making a positive electrode sheet of the lithium ion capacitor, and a lithium ion capacitor using the positive electrode sheet. Background technique [0002] Although supercapacitors have the advantages of high power, long life and fast charging speed, their applications are limited in many aspects due to their low voltage and low energy density. [0003] Supercapacitors use activated carbon as the positive electrode, while lithium-ion capacitors use lithium-intercalated graphite as the negative electrode. The maximum operating voltage can be increased from 2.7V to 4.2V, and the capacity and energy have been greatly improved accordingly. Therefore, lithium-ion capacitors have wider applications. [0004] The key of lithium-ion capacitors lies in the realization of the lithium-intercalation state of the negative electrode. Various manufacturing technologies of lithium-ion c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/145
CPCY02E60/13
Inventor 韩昌隆许瑞赵丰刚付成华
Owner DONGGUAN AMPEREX TECH
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