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High-specific-characteristic lithium ion capacitor and preparation method thereof

A technology of capacitors and lithium ions, which is applied in the field of high-specificity lithium-ion capacitors and its preparation, can solve problems such as unreasonable collocation or ratio, difficulty in meeting the energy density and high-power discharge capacity of high-specification capacitors, and achieve The effect of high energy density, high specific capacitance, and high power discharge capability

Active Publication Date: 2021-02-26
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] For example, although CN201610687652.6 and CN201910977550.1 disclose some composite materials with good effects, there is no systematic overall research on how to apply them to supercapacitors, resulting in unreasonable matching or proportioning when they are used as active materials. , it is difficult to meet the needs of high-ratio characteristic capacitors for energy density and high-power discharge capability

Method used

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  • High-specific-characteristic lithium ion capacitor and preparation method thereof
  • High-specific-characteristic lithium ion capacitor and preparation method thereof
  • High-specific-characteristic lithium ion capacitor and preparation method thereof

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Effect test

Embodiment 1

[0041] A preparation method for a high specific characteristic lithium ion capacitor, comprising the steps of:

[0042] (1) Preparation of negative electrode sheet: Mix activated carbon, graphene-based Fe3O4 composite material, lithium titanate, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform viscous shape The negative electrode active slurry was coated on the current collector with a squeegee, dried in a vacuum oven at 80-100°C for 48 hours, and cut according to the required size to obtain the negative electrode sheet;

[0043] (2) Production of positive electrode sheet: mix lithium cobalt oxide, graphene-based manganese dioxide composite material, NCM811, graphene, activated carbon, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform The viscous positive electrode active slurry is coated on the current collector with a squeegee, dried in a vacuum drying oven at 80-100°C ...

Embodiment 2

[0050] A preparation method for a high specific characteristic lithium ion capacitor, comprising the steps of:

[0051] (1) Negative plate production: Mix graphene-based Fe3O4 composite material, activated carbon, lithium titanate, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform viscous shape The negative electrode active slurry was coated on the current collector with a squeegee, dried in a vacuum oven at 80-100°C for 48 hours, and cut according to the required size to obtain the negative electrode sheet;

[0052] (2) Production of positive electrode sheet: mix lithium cobalt oxide, graphene-based manganese dioxide composite material, NCM811, graphene, activated carbon, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform The viscous positive electrode active slurry is coated on the current collector with a squeegee, dried in a vacuum drying oven at 80-100°C for 48 hours, ...

Embodiment 3

[0059] A preparation method for a high specific characteristic lithium ion capacitor, comprising the steps of:

[0060] (1) Negative plate production: Mix graphene-based Fe3O4 composite material, activated carbon, lithium titanate, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform viscous shape The negative electrode active slurry was coated on the current collector with a squeegee, dried in a vacuum oven at 80-100°C for 48 hours, and cut according to the required size to obtain the negative electrode sheet;

[0061] (2) Production of positive electrode sheet: mix lithium cobalt oxide, graphene-based manganese dioxide composite material, NCM811, graphene, activated carbon, carbon nanotubes, polytetrafluoroethylene, and N-dimethylpyrrolidone for 2-3 hours to obtain a uniform The viscous positive electrode active slurry is coated on the current collector with a squeegee, dried in a vacuum drying oven at 80-100°C for 48 hours, ...

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Abstract

The invention belongs to the technical field of lithium ion capacitors, and particularly relates to a high-specific-characteristic lithium ion capacitor and a preparation method thereof. A positive electrode material is active carbon doped with lithium cobalt oxide, a graphene-based manganese dioxide composite material, a nickel cobalt lithium manganate material and graphene; the negative electrode material is lithium titanate doped with a graphene-based ferroferric oxide composite material and activated carbon; and the lithium ion capacitor is clean in appearance and free of liquid leakage, and has high energy density and high-power discharge capacity.

Description

technical field [0001] The invention belongs to the technical field of lithium ion capacitors, and in particular relates to a high specificity lithium ion capacitor and a preparation method thereof. Background technique [0002] Lithium-ion capacitors are a new type of energy storage device assembled by mixing and matching lithium-ion battery materials and supercapacitor electrode materials as positive and negative electrodes, respectively. Due to the low power density of traditional lithium-ion batteries (less than 500W·kg -1 ), long charging time, and poor cycle life limit its application range. In addition, due to the high power density of supercapacitors (up to several 10kW·kg -1 ), long cycle life, wide operating temperature range, and rapid charging, which have attracted widespread attention and application, but the low energy density (1-10Wh kg -1 ) has limited its application. [0003] Against the above background, in recent years, hybrid energy storage devices t...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/36H01G11/46H01G11/86
CPCH01G11/06H01G11/46H01G11/36H01G11/86Y02E60/13
Inventor 陈安国周雄付紫微廖敏会石斌刁思强陈晓涛刘富亮
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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