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Porous gel polyelectrolyte thin film and preparation method thereof

A technology of gel polymer and electrolyte film, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of insufficient liquid electrolyte adsorption, complex solvent extraction steps, low porosity, etc., and achieve convenient product separation, Strong polarity and good film-forming effect

Inactive Publication Date: 2007-10-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still complex solvent extraction steps in the manufacturing process of Bellcore technology, and due to the slightly low porosity and insufficient adsorption of liquid electrolyte, the ionic conductivity needs to be further improved

Method used

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  • Porous gel polyelectrolyte thin film and preparation method thereof
  • Porous gel polyelectrolyte thin film and preparation method thereof
  • Porous gel polyelectrolyte thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] 1) In a 100ml three-necked flask, 2.42g of polyethylene glycol monomethyl ether methacrylate and 5.3g of acrylonitrile were blended and dissolved in 26ml of ethanol, and stirred evenly. After adding 0.054 g of azobisisobutyronitrile, nitrogen gas was introduced for 30 minutes, then the temperature was raised to 70° C., and the mixture was reacted for 8 hours to obtain a transparent viscous liquid. Then pour it into a 100ml single-necked flask, evaporate the ethanol solvent by a rotary evaporator, and dry at 50°C for 24 hours under vacuum to obtain a light yellow waxy solid, which is an acrylonitrile-polyethylene glycol monomethyl ether methacrylate copolymer;

[0018] 2) Get 2.1g polyvinylidene fluoride and 0.9g polyethylene glycol monomethyl ether ester-acrylonitrile copolymer blend and dissolve in 20g N, N-dimethylacetamide (DMAC) solvent, at 50 ℃ magnetic stirring for 48 hours, dissolved evenly. After the polymer blend was cooled to room temperature, the polymer sol...

Embodiment 2

[0023] 1) In a 100ml three-necked flask, 2.42g of polyethylene glycol monomethyl ether methacrylate and 2.65g of acrylonitrile were blended and dissolved in 16.9ml of ethanol, and stirred evenly. After adding 0.035 g of azobisisobutyronitrile, argon was introduced for 30 minutes, then the temperature was raised to 80° C., and the mixture was reacted for 8 hours to obtain a transparent viscous liquid. Then pour it into a 100ml one-necked flask, and evaporate the ethanol solvent by a rotary evaporator. Drying under vacuum at 50°C for 24 hours yielded a pale yellow waxy acrylonitrile-polyethylene glycol monomethyl ether methacrylate copolymer;

[0024] 2) 2.7 g of polyvinylidene fluoride and 0.3 g of polyethylene glycol monomethyl ether methacrylate-acrylonitrile copolymer were blended and dissolved in 15 g of DMAC solvent, stirred magnetically at 50° C. for 48 hours, and dissolved uniformly. After the blended polymer was cooled to room temperature, the polymer solution was coat...

Embodiment 3

[0026] 1) with embodiment 1 step 1)

[0027]2) 2.4 g of polyvinylidene fluoride and 0.6 g of polyethylene glycol monomethyl ether methacrylate-acrylonitrile copolymer were blended and dissolved in 17 g of DMAC solvent, stirred magnetically at 50° C. for 48 hours, and dissolved uniformly. After the blended polymer was cooled to room temperature, the polymer solution was coated on a glass plate with a stainless steel scraper, and then immersed in deionized water to obtain a porous film. After immersing the obtained porous film in n-hexane for 24 h, first Vacuum-dry at room temperature for 6 hours, then vacuum-dry at 60°C for 24 hours. Obtain a porous membrane with a thickness of 100 μm, which is immersed in a 1M lithium hexafluorophosphate carbonate electrolyte solution. The carbonate electrolyte solution of 1M lithium hexafluorophosphate is composed of dimethyl carbonate, diethyl carbonate and ethylene carbonate, According to the mass ratio of dimethyl carbonate: diethyl carbo...

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Abstract

The invention discloses a multihole gel polymer electrolytic thin film, which comprises the following steps: comprising polyvinylidene fluoride with mass percent at 33-54%, acrylon-methacrylic acid macrogol single dimethyl ether ester copolymer and 43-52% 1M hexafluorophosphoric acid lithium carbonic ester ionogen; synthesizing metyl group acroleic acid carbowax single dimethyl ether ester and acrylic nitrile copolymer; blending and dissolving to N, N-dimethyl acetamine dissolvent with polyvinylidene fluoride; getting multihole thin film through immersed deposition method; absorbing hexafluorophosphoric acid lithium carbonic ester ionogen; getting the product. This invention possesses simple method and high film strength, which possesses good application prospect in polymer lithium ion battery.

Description

technical field [0001] The invention belongs to a gel polymer electrolyte material for a polymer lithium ion battery and a preparation method thereof, in particular to an acrylonitrile-polyethylene glycol monomethyl ether methacrylate copolymer blended with a modified porous polymer Gel polymer electrolyte film of vinylidene fluoride and its preparation method. Background technique [0002] Polymer electrolyte lithium-ion battery is a new generation of rechargeable lithium-ion battery developed on the basis of liquid lithium-ion batteries. It uses a polymer electrolyte and is directly sandwiched between the positive and negative electrodes of the lithium battery, with a simple structure. It not only has the excellent performance of liquid lithium-ion batteries, but also is more flexible in appearance design; since there is no free electrolyte in the assembled battery, the problems of liquid leakage and explosion of liquid lithium-ion batteries are improved. As one of the im...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J7/06C08L27/16C08K5/21H01M10/40C08L33/20
CPCY02E60/122Y02E60/10
Inventor 杨慕杰李为立李扬
Owner ZHEJIANG UNIV
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