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Polymer electrolyte based on vinylene carbonate and polyethylene (methyl) acrylate and preparation method of polymer electrolyte

A vinylene carbonate and polyvinylene carbonate technology, which is applied in the field of electrolytes, can solve the problems of combustion and explosion, limited application, low ionic conductivity, etc., and achieves simple preparation, high room temperature conductivity, electrochemical and interface stability. Good results

Active Publication Date: 2017-12-19
HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these polymers have certain disadvantages: polyvinylidene fluoride-hexafluoropropylene, polyacrylonitrile, polyacrylamide, and polymethyl methacrylate are commonly used as gel polymer electrolytes, which have high ionic conductivity, but due to the use of small molecule plasticizers, there will also be safety issues of combustion and explosion
Polyoxyethylene and polyoxypropylene can be used as all-solid polymer electrolytes, however, low ionic conductivity limits their applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Vinylene carbonate 1g, polyethylene glycol acrylate (molecular weight 1000) 9g, add 20g tetrahydrofuran, pour into a three-necked flask, add 0.1g azobisisobutyronitrile, react at 70°C for 4h, add 0.4g lithium trifluorosulfonate , after stirring evenly, pour the mixed solution into a PTFE mold to dry to form a film, and vacuum dry to obtain a solid polymer electrolyte membrane.

Embodiment 2

[0027] Vinylene carbonate 1g, polyethylene glycol acrylate (molecular weight 4000) 2g, add 20g of acetone, pour into a three-necked flask, add 0.01g of azobisisobutyronitrile, react at 70°C for 4h, add 0.4g of lithium perchlorate, After stirring evenly, inject the mixed solution into a PTFE mold to dry to form a film, and vacuum dry to obtain a solid polymer electrolyte membrane.

Embodiment 3

[0029] Vinylene carbonate 2g, polyethylene glycol acrylate (molecular weight 200) 1g, methyl methacrylate 1g, add 20g ethyl acetate, pour into a three-necked flask, add benzoyl peroxide 0.01g, react at 80°C for 4h, Add 1g of lithium bistrifluoromethanesulfonimide, stir evenly, pour the mixed solution into a PTFE mold, dry it to form a film, and dry it in vacuum to obtain a solid polymer electrolyte membrane.

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Abstract

The invention discloses a polymer electrolyte based on vinylene carbonate and polyethylene (methyl) acrylate and a preparation method of the polymer electrolyte. The electrolyte is characterized in that a lithium salt is dispersed in a solid-state polymer matrix, the content of the lithium salt in the solid-state polymer matrix accounts for 5-50wt%, and the solid-state polymer matrix is a copolymer of the vinylene carbonate and the polyethylene (methyl) acrylate or a copolymer of the vinylene carbonate, the polyethylene (methyl) acrylate and a framework monomer. The solid-state polymer electrolyte is simple to prepare, is high in room-temperature conductivity and can be used as an electrolyte of a lithium ion battery.

Description

technical field [0001] The invention relates to the field of electrolytes, in particular to a vinylene carbonate and polyethylene glycol (meth)acrylate-based polymer electrolyte and a preparation method thereof. Background technique [0002] Large-scale energy storage systems have become an important part of the future smart grid. The development of high-efficiency energy storage technologies has significant social and economic benefits for improving the utilization efficiency of existing power generation systems, power quality, and promoting the widespread application of renewable energy. One of the most promising technologies for industrialization in energy storage technology is electrochemical energy storage technology. Lithium-ion batteries are regarded as the most competitive electrochemical storage technology due to their light weight, high specific energy / specific power, and long life. It is one of the energy technologies, and it is more and more widely used in variou...

Claims

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Application Information

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IPC IPC(8): H01M10/056H01M10/0565H01M10/0525C08G64/30
CPCC08G64/30H01M10/0525H01M10/056H01M10/0565H01M2300/0082H01M2300/0091Y02E60/10
Inventor 白永平赵彦彪安茂忠陈国荣白杨李卫东席丹殷晓芬
Owner HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS
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