Polyion liquid electrolyte for in-situ photopolymerization without solvent

A technology of polyionic liquids and ionic liquids, applied in the field of polyionic liquid electrolytes, can solve the problems of cumbersome preparation methods and inability to meet room temperature cycles, and achieve the effects of improving ionic conductivity, good application prospects, and improving electrochemical performance

Active Publication Date: 2020-08-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN201810874493.X discloses a four-arm branched polyionic liquid gel electrolyte diaphragm and its preparation method. A four-arm branched polyionic liquid gel electrolyte diaphra...

Method used

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  • Polyion liquid electrolyte for in-situ photopolymerization without solvent
  • Polyion liquid electrolyte for in-situ photopolymerization without solvent
  • Polyion liquid electrolyte for in-situ photopolymerization without solvent

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Embodiment 1

[0023] Take 0.001 mol amount of functionalized polymerizable ionic liquid monomer, add 0.0005 mol PEGDMA, and at the same time add photoinitiator with 5% mass fraction of the total reactive monomer, and add 1-B according to the molar ratio of the total reactive monomer 1:1 Ethyl-3-methylimidazole bistrifluoromethanesulfonimide ([Emim][TFSI]) plasticizer was stirred at room temperature for 6 hours and mixed thoroughly, and then lithium salt was added according to the molar ratio of the total amount of reacted monomers of 1:0.2 LiTFSI, continue to stir for 3 hours to fully mix into a clear solution, use a spatula to evenly coat the viscous solution on a flat polytetrafluoroethylene plate, irradiate with UV light for 60 minutes, perform light polymerization reaction, and finally obtain a cured polyion Liquid electrolyte, and finally cut the polymer electrolyte film into a 16mm diameter disc film for storage and further testing.

Embodiment 2

[0025] Take 0.001 mol amount of functionalized polymerizable ionic liquid monomer, add 0.0005 mol PEGDMA, and at the same time add photoinitiator with 5% mass fraction of the total reactive monomer, and add 1-B according to the molar ratio of the total reactive monomer 1:0.75 Ethyl-3-methylimidazole bistrifluoromethanesulfonimide ([Emim][TFSI]) plasticizer was stirred at room temperature for 6 hours and mixed thoroughly, and then lithium salt was added according to the molar ratio of the total amount of reacted monomers of 1:0.2 LiTFSI, continue to stir for 3 hours to fully mix into a clear solution, use a spatula to evenly coat the viscous solution on a flat polytetrafluoroethylene plate, irradiate with UV light for 60 minutes, perform light polymerization reaction, and finally obtain a cured polyion Liquid electrolyte, and finally cut the polymer electrolyte film into a 16mm diameter disc film for storage and further testing.

Embodiment 3

[0027] Take 0.001 mol amount of functionalized polymerizable ionic liquid monomer, add 0.0005 mol PEGDMA, and add photoinitiator with 5% mass fraction of total reactive monomer at the same time, and add 1-B according to the molar ratio of total reactive monomer 1:0.5 Ethyl-3-methylimidazole bistrifluoromethanesulfonimide ([Emim][TFSI]) plasticizer was stirred at room temperature for 6 hours and mixed thoroughly, and then lithium salt was added according to the molar ratio of the total amount of reacted monomers of 1:0.2 LiTFSI, continue to stir for 3 hours to fully mix into a clear solution, use a spatula to evenly coat the viscous solution on a flat polytetrafluoroethylene plate, irradiate with UV light for 60 minutes, perform light polymerization reaction, and finally obtain a cured polyion Liquid electrolyte, and finally cut the polymer electrolyte film into a 16mm diameter disc film for storage and further testing.

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Abstract

The invention provides a polyion liquid electrolyte for in-situ photopolymerization without a solvent. The polyion liquid electrolyte is characterized in that polymerizable functionalized ionic liquidand polyethylene glycol dimethacrylate (PEGDMA) are subjected to one-step cross-linking polymerization under UV illumination to form a novel functionalized cross-linked polyionic liquid electrolyte.The electrolyte is carried out under a solvent-free condition; the operation is simple, the possibility of environmental pollution is little, the high ionic conductivity is showed, compared with a traditional polymer electrolyte, the synthesis process flow is shortened, the cost is reduced, the ionic conductivity at room temperature is improved, a new idea is provided for the development of polymer electrolytes, and the polyion liquid electrolyte has a good application prospect.

Description

Technical field [0001] The invention belongs to the field of electrochemical lithium ion batteries, and relates to a polyionic liquid electrolyte for in-situ photopolymerization without solvent. Background technique [0002] As the main power source, lithium-ion batteries occupy a dominant position in the portable device market due to their high energy density, high output voltage, long life and environmentally friendly operation. In traditional lithium-ion batteries, organic liquid electrolytes are used as the main body, but there are potential safety hazards that are flammable and explosive. Solid polymer electrolytes have excellent mechanical properties, good thermal stability and inhibit lithium dendrites. Growth and other properties have become a new generation of new electrolytes that can replace traditional liquid electrolytes. This excellent performance makes it a good research and development prospect in the new generation of lithium-ion batteries. [0003] As a promisin...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/42
CPCH01M10/0565H01M10/4235H01M2300/0088Y02E60/10
Inventor 董陶沙一凡郑鸿帅张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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