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

A production method, lithium ion technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as difficult to meet the use requirements of long cycle life, reduce the risk of powdering and falling off, and maintain stability Sexuality, avoid the effect of accelerated aging

Active Publication Date: 2021-03-12
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 to the electrolyte solution and 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, single-side positive pole piece and single-side negative pole piece that absorb the mixed solution are rewound after heat treatment, and the composite bipolar pole piece, composite single-side positive pole piece and Composite unilateral negative electrode pole roll.

[0047] When the mixed solution is heated at 70°C to 90°C, the polymer monomer polymerization reaction will be triggered, so that the mixed solution adsorbed on the outside of the bipolar pole piece, the single-side positive pole piece and the single-side negative pole piece is solidified to form a polymer film , in the present ...

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] NCM523 (LiNi 0.5 co 0.2 mn 0.3 o 2 ) According to the proportion of 92.5% by weight, take the corresponding weight and add it into the mixing tank of the binder polytetrafluoroethylene solution with a formula weight ratio of 2.5%, stir for 1.5h, add carbon fiber and 1% graphite with a weight ratio of 1.5% The composite conductive agent of olefin and 2.5% carbon nanotubes was stirred at a high speed for 2.5 hours; it was transported to a buffer tank through a twin-screw extrusion device for standby, and a slurry of a positive electrode active material was obtained.

[0055] Weigh the corresponding weight of activated carbon and lithium powder according to the weight ratio of 91.5%, and add it into the mixing bucket of the binder polytetrafluoroethylene solution with a formula weight ratio of 2%, stir for 1.5h...

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] NCM523 (LiNi 0.5 co 0.2 mn 0.3 o 2 ) According to the proportion of 92.5% by weight, take the corresponding weight and add it into the mixing tank of the binder polytetrafluoroethylene solution with a formula weight ratio of 2.5%, stir for 1.5h, add carbon fiber and 1% graphite with a weight ratio of 1.5% The composite conductive agent of olefin and 2.5% carbon nanotubes was stirred at a high speed for 2.5 hours; it was transported to a buffer tank through a twin-screw extrusion device for standby, and a slurry of a positive electrode active material was obtained.

[0070] Weigh the corresponding weight of activated carbon and lithium powder according to the weight ratio of 91.5%, and add it into the mixing bucket of the binder polytetrafluoroethylene solution with a formula weight ratio of 2%, stir for 1.5h...

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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 the lithium ion capacitor. The method comprises: manufacturing a bipolar pole piece, a single-side positive pole piece and a single-side negative pole piece by adopting an extrusion spraying method; and adsorbing the mixed solution containing the electrolyte solution, carrying out heating polymerization, rolling, punching and lamination processes to obtain a pole group, rolling and packaging the pole group, carrying out heating formation by using a clamping plate, and carrying out vacuumizing treatment to obtain the high-voltage polymer lithium ion capacitor. The lithium ion capacitor manufactured by the manufacturing method provided by the invention has the advantages of small internal resistance, high charging and discharging power, wide working 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 the lithium ion capacitor. Background technique [0002] After years of research and development, lithium-ion capacitors have entered the stage of mass commercial application. The positive and negative electrode material systems emerge in endlessly, but their voltage is limited by the development of positive and negative electrode materials and electrolyte solution technology. [0003] In the manufacturing process of lithium-ion capacitors, there is a certain stress in the diaphragm between the positive and negative electrodes during the lamination process, which is prone to elastic deformation, resulting in relaxation and wrinkles after liquid injection. The generation of diaphragm wrinkles will directly lead to Lithium precipitation occurs during use and use, which brings poten...

Claims

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Application Information

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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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