Gel polymer electrolyte with semi-interpenetrating network structure and preparation method thereof

A gel polymer and network structure technology, applied in circuits, electrical components, secondary batteries, etc., can solve rare problems and achieve the effects of inhibiting crystallization, improving mechanical properties, and high ion conductivity

Inactive Publication Date: 2009-11-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Research in this area has broad prospects for development, but there are still few reported semi-interpenetrating network structure polymer electrolyte materials.

Method used

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  • Gel polymer electrolyte with semi-interpenetrating network structure and preparation method thereof
  • Gel polymer electrolyte with semi-interpenetrating network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Add 0.53g of acrylonitrile, 2.12g of glycidyl methacrylate, 0.015g of benzoyl peroxide and 40ml of N,N-dimethylformamide into a three-necked flask. After it was completely dissolved, it was reacted at 60° C. for 10 h under the protection of nitrogen. The resulting product was precipitated with methanol, dissolved in acetone, and precipitated with methanol, repeated three times. The product was dried in a vacuum oven at 40° C. to a constant weight to obtain a copolymer.

[0022] 2) Dissolve 0.05g of copolymer and 0.2g of polyethylene oxide into 50ml of acetonitrile solution under stirring at room temperature; after the above solution is completely dissolved, add 0.004g of diethylenetriamine and crosslink at 60°C for 4 hours; dissolve the above solution Cast on a polytetrafluoroethylene plate, volatilize at room temperature to form a film, then place it in a vacuum oven at 70°C for 12 hours to make the system completely cross-linked, and immerse the obtained film in 1m...

Embodiment 2

[0024] 1) Add 0.53g of acrylonitrile, 2.84g of glycidyl methacrylate, 0.03g of benzoyl peroxide and 50ml of N,N-dimethylformamide into a three-necked flask successively. After it was completely dissolved, it was reacted at 70° C. for 10 h under the protection of nitrogen. The resulting product was precipitated with methanol, dissolved in acetone, and precipitated with methanol, repeated three times. The product was dried in a vacuum oven at 40° C. to a constant weight to obtain a copolymer.

[0025] 2) Dissolve 0.2g of copolymer and 0.4g of polyethylene oxide into 50ml of acetonitrile solution under stirring at room temperature; after the above solution is completely dissolved, add 0.02g of diethylenetriamine to crosslink at 80°C for 2 hours; cast the above solution Put it on a polytetrafluoroethylene plate, volatilize at room temperature to form a film, put it in a vacuum oven at 70°C for 12 hours, make the system cross-linked completely, and immerse the obtained film in 1mol...

Embodiment 3

[0027] 1) Add 0.53g of acrylonitrile, 3.18g of glycidyl methacrylate, 0.037g of benzoyl peroxide and 50ml of N,N-dimethylformamide (DMF) into a three-necked flask successively. After it was completely dissolved, it was reacted at 80° C. for 6 h under the protection of nitrogen. The resulting product was precipitated with methanol, dissolved in acetone, and precipitated with methanol, repeated three times. The product was dried in a vacuum oven at 40° C. to a constant weight to obtain a copolymer.

[0028] 2) Dissolve 0.2g of copolymer and 0.3g of polyethylene oxide into 50ml of acetonitrile solution under stirring at room temperature; after the above solution is completely dissolved, add 0.03g of diethylenetriamine to crosslink at 70°C for 3 hours; cast the above solution Put it on a polytetrafluoroethylene plate, volatilize at room temperature to form a film, put it in a vacuum oven at 70°C for 12 hours, make the system cross-linked completely, and immerse the obtained film i...

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Abstract

The invention discloses a gel polymer electrolyte with a semi-interpenetrating network structure and a preparation method thereof. The gel polymer electrolyte consists of polyethylene oxide, copolymer, a cross liner and liquid electrolyte, wherein the mass ratio of the copolymer to the polyethylene oxide is 0.25-4 to 1, the mass ratio of the cross linker to the copolymer is 0.4-1 to 5, and the electrolyte is lithium hexafluorophosphate carbonic ester electrolyte with the concentration of 1 mol / L. The preparation method comprises the following steps of: mixing the copolymer (acrylonitrile-glycidyl methacrylate) and the polyethylene oxide, adding the cross linker, namely diethylenetriamine, then preparing and obtaining a polymer film substrate, soaking the substrate in the electrolyte, and finally preparing the gel polymer electrolyte film. The gel polymer electrolyte film prepared by the method is characterized by high ionic conductance, excellent mechanical property of the system and the like, and has bright application prospect in polymer lithium ion batteries.

Description

technical field [0001] The invention relates to a gel polymer electrolyte and a preparation method thereof, in particular to a gel polymer electrolyte with a semi-interpenetrating network structure for a polymer lithium ion battery and a preparation method thereof. Background technique [0002] Polymer lithium-ion batteries have the advantages of strong shape and area variability, light weight, etc., and their safety has been greatly improved compared with liquid lithium-ion batteries, thus satisfying people's increasing miniaturization and thinning of mobile phones, MP3, etc. The requirements have become one of the research focuses of major battery companies. Gel polymer electrolyte is an important part of polymer lithium-ion batteries, which includes polymers, plasticizers, and lithium salt electrolytes, and can function as a separator and ion-conducting carrier in a liquid electrolyte battery system , and its research has also received widespread attention. However, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M10/38
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 李扬罗丹杨慕杰
Owner ZHEJIANG UNIV
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