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Composite air suction element, preparation method thereof and anti-flatulence self-repairing soft package lithium battery

A soft-packed lithium battery and component technology, applied in electrical components, battery pack components, circuits, etc., can solve problems such as lithium batteries prone to bulge, improve production efficiency and resource utilization, reduce scrap ratio, and improve battery safety effect

Active Publication Date: 2021-03-09
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that lithium batteries are prone to swelling, the application provides a composite getter element and its preparation method and a soft-packed lithium battery with anti-bloating and self-repairing

Method used

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  • Composite air suction element, preparation method thereof and anti-flatulence self-repairing soft package lithium battery
  • Composite air suction element, preparation method thereof and anti-flatulence self-repairing soft package lithium battery
  • Composite air suction element, preparation method thereof and anti-flatulence self-repairing soft package lithium battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] Preparation example of carbon-based conductive agent

[0062] Take the powder of conductive carbon black, conductive carbon nanotubes and graphene and put it into a mixer and mix for 20-30 minutes. After sieving, a carbon-based conductive agent with uniform composition is obtained. The particle size of the carbon-based conductive agent does not exceed . The composition of the carbon-based conductive agent is shown in Table 1.

[0063] Table 1 Raw material components prepared by carbon-based conductive agent

[0064]

[0065]

Embodiment 1

[0068] A preparation method of a composite getter element, comprising the following steps:

[0069] S1: 50g of electrolyzed MnO 2 , 10g of Ag 2 0, 4.5g carbon-based conductive agent, 15g activated carbon powder mix and grind 30min, particle size is 100-200nm, then be dispersed in 400ml alcohol and be mixed with slurry, carbon-based conductive agent is the carbon-based conductive agent of preparation example 1 , Alcohol use 95% alcohol.

[0070] S2: Add 14g of PVDF binder, 3g of sodium sulfate and 6.5g of gas-phase SiO to the slurry obtained in step S1 2 Mix uniformly to prepare a suspension, and ultrasonically treat the suspension for 3 minutes, then cast and shape it, and perform dynamic vacuum drying at 25°C for 48 hours to obtain a getter precursor. In other embodiments, the PVDF binder can also be replaced with a PTFE binder.

[0071] S3: Immerse the getter precursor in 20% perfluoroheptylsulfonylaminoethyltrimethoxysilane isopropanol solution, place it at 25°C for 24 ...

Embodiment 2

[0073] A preparation method of a composite getter element, comprising the following steps:

[0074] S1: 50g of electrolyzed MnO 2 , 10g of Ag 2 0, 4.5g carbon-based conductive agent, 13g activated carbon powder mix and grind 30min, particle size is 100-200nm, then be dispersed in 370ml alcohol and be mixed with slurry, carbon-based conductive agent is the carbon-based conductive agent of preparation example 1 , Alcohol use 95% alcohol.

[0075] S2: Add 13g of PVDF binder, 5g of sodium sulfate and 6.5g of gas-phase SiO to the slurry obtained in step S1 2 Mix uniformly to prepare a suspension, and ultrasonically treat the suspension for 2 minutes, then cast and shape it, and perform dynamic vacuum drying at 20°C for 50 hours to obtain a getter precursor.

[0076] S3: Immerse the getter precursor in the isopropanol solution of 18% perfluoroheptylsulfonylaminoethyltrimethoxysilane, put it at 20°C for 24 hours, take out the getter precursor, wash it and dry it. Get the compound...

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Abstract

The invention relates to the field of lithium batteries, and particularly discloses a composite air suction element, a preparation method of the composite air suction element and an anti-flatulence self-repairing soft package lithium battery. The composite getter element is prepared from the following raw materials in parts by weight: 45-55 parts of electrolytic MnO2, 9.5-10.5 parts of Ag2O or Ag,3.5-5.5 parts of a carbon-based conductive agent, 13-17 parts of activated carbon powder, 13-15 parts of a binder, 1-5 parts of sodium sulfate and 5-10 parts of gas-phase SiO2. The preparation methodcomprises the following steps: uniformly mixing electrolytic MnO2, Ag2O or Ag powder, a carbon-based conductive agent and activated carbon powder, grinding and dispersing to prepare slurry; adding abinder, sodium sulfate and gas-phase SiO2 into the slurry, performing mixing to prepare a suspension, carrying out ultrasonic treatment on the suspension, pouring a mold with a fixed shape, carrying out dynamic vacuum drying at room temperature, and performing cooling to room temperature to obtain an air suction precursor; and performing surface hydrophobic and oleophobic treatment on the precursor element. The composite air suction element can be used for an anti-flatulence self-repairing soft package lithium battery, and has the advantage of a bulge self-repairing function.

Description

technical field [0001] The application relates to the field of lithium batteries, more specifically, it relates to a composite getter element, a preparation method thereof, and a flat-pack lithium battery with anti-flatulence and self-repairing. Background technique [0002] As the types and quantities of mobile electronic products continue to grow, the demand for secondary batteries continues to increase, so it is very necessary and important to develop new rechargeable batteries. [0003] Lithium-ion batteries are widely used in digital products due to their high energy density, high average output voltage, and high charging efficiency. It is to embed lithium ions in graphite to form a negative electrode, and the positive electrode material is commonly used LiCoO 2 , Li x NiO 2 or Li x MnO 4 , the electrolyte uses LiPF 6 , divinyl carbonate and dimethyl carbonate and other anhydrous aprotic mixtures. [0004] Polymer lithium-ion battery cells mostly use aluminum-pla...

Claims

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Application Information

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IPC IPC(8): H01M50/141
CPCY02E60/10
Inventor 许晓雄崔言明龚和澜黄园桥
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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