Manufacturing method of high voltage polymer lithium ion capacitor and lithium ion capacitor

A manufacturing method and polymer technology, which are applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problem of difficult to meet the use requirements of long cycle life, reduce the risk of pulverization and shedding, and maintain stability. the effect of reducing internal resistance

Active Publication Date: 2022-07-05
常德中科多源电力融合技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the design methods and manufacturing methods of existing lithium-ion capacitor products are difficult to meet the requirements of long cycle life under high-power operating conditions

Method used

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  • Manufacturing method of high voltage polymer lithium ion capacitor and lithium ion capacitor
  • Manufacturing method of high voltage polymer lithium ion capacitor and lithium ion capacitor
  • Manufacturing method of high voltage polymer lithium ion capacitor and lithium ion capacitor

Examples

Experimental program
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preparation example Construction

[0045] The preparation method of the mixed solution includes: adding methyl methacrylate into the electrolyte solution, stirring for 0.5h to 2h; adding polyvinylidene fluoride, triethylene glycol dimethacrylate and benzyl peroxide to the above solution Acyl or azobisisobutyronitrile was stirred for 2h to 3h, and the temperature was controlled below 20°C.

[0046] The bipolar pole piece, the unilateral positive pole piece and the unilateral negative pole piece that adsorb the mixed solution are heated and wound up to obtain the composite bipolar pole piece, the composite unilateral positive pole piece and the composite unilateral positive pole piece wrapped with the polymer film, respectively. The pole roll of the composite unilateral negative pole piece.

[0047] When the mixed solution is heated at 70°C to 90°C, the polymer monomer polymerization reaction will be initiated, so that the mixed solution adsorbed on the outside of the bipolar pole piece, the unilateral positive p...

Embodiment 1

[0053] An embodiment of the present invention provides a method for manufacturing a high-voltage polymer lithium-ion capacitor, comprising the following steps:

[0054] The NCM523 (LiNi 0.5 Co 0.2 Mn 0.3 O 2 ) Weigh the corresponding weight according to the ratio of 92.5% by weight and add it into the mixing barrel of the binder polytetrafluoroethylene solution with a formula weight ratio of 2.5%, stir for 1.5h, and add carbon fibers with a weight ratio of 1.5% and 1% graphite. The composite conductive agent of alkene and 2.5% carbon nanotubes is then stirred at high speed for 2.5 hours; it is transported to a buffer tank through a double-screw extrusion equipment for use, and the slurry of the positive electrode active material is obtained.

[0055] Activated carbon and lithium powder were weighed according to the weight ratio of 91.5%, and the corresponding weight was added to the mixing tank of the binder polytetrafluoroethylene solution with a formula weight ratio of 2%...

Embodiment 2

[0068] An embodiment of the present invention provides a method for manufacturing a high-voltage polymer lithium-ion capacitor, comprising the following steps:

[0069] The NCM523 (LiNi 0.5 Co 0.2 Mn 0.3 O 2 ) Weigh the corresponding weight according to the ratio of 92.5% by weight and add it into the mixing barrel of the binder polytetrafluoroethylene solution with a formula weight ratio of 2.5%, stir for 1.5h, and add carbon fibers with a weight ratio of 1.5% and 1% graphite. The composite conductive agent of alkene and 2.5% carbon nanotubes is then stirred at high speed for 2.5 hours; it is transported to a buffer tank through a double-screw extrusion equipment for use, and the slurry of the positive electrode active material is obtained.

[0070] Activated carbon and lithium powder were weighed according to the weight ratio of 91.5%, and the corresponding weight was added to the mixing tank of the binder polytetrafluoroethylene solution with a formula weight ratio of 2%...

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Abstract

The invention is applicable to the technical field of lithium ion capacitors, and provides a manufacturing method of a high-voltage polymer lithium ion capacitor and a lithium ion capacitor. The method adopts an extrusion spraying method to manufacture bipolar pole pieces, unilateral positive pole pieces and single Edge the negative pole piece, soak the obtained pole piece in the electrolyte solution, then adsorb the mixed solution containing the electrolyte solution, and obtain the pole group through the processes of heating polymerization, winding, punching and lamination, and the pole group is rolled, packaged, and heated with a splint After the formation, vacuum treatment is performed to obtain a high-voltage polymer lithium-ion capacitor. The lithium ion capacitor produced by the production method provided by the invention has the advantages of small internal resistance, large charging and discharging power, wide operating temperature range and long cycle life, and is suitable for the field of electric power frequency modulation.

Description

technical field [0001] The invention belongs to the technical field of lithium ion capacitors, and in particular relates to a manufacturing method of a high voltage polymer lithium ion capacitor and a lithium ion capacitor. Background technique [0002] After years of research and development, lithium-ion capacitors have entered the stage of mass commercial application. Positive and negative electrode material systems emerge in an endless stream, but their voltage is limited by the development of positive and negative electrode materials and electrolyte solution technology. [0003] In the production process of lithium ion capacitors, the diaphragm between the positive and negative plates has a certain stress during the lamination process, which is prone to elastic deformation, resulting in relaxation and wrinkles after injection. The generation of diaphragm wrinkles will directly lead to the formation process. And lithium precipitation occurs during use, which brings safety...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/48H01G11/50
CPCH01G11/84H01G11/86H01G11/50H01G11/48Y02E60/13
Inventor 佘沛亮
Owner 常德中科多源电力融合技术研究院
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