Cross-lined polymethyl ethylene carbonate polymer electrolyte membrane and preparation method thereof

A polymethylethylene carbonate terpolymer and polymethylethylene carbonate technology are applied in the field of polymer electrolytes and can solve the problems of poor solubility, poor mechanical and thermal properties, low ionic conductivity and the like, Achieve the effect of improved thermal performance, easy implementation, and simple process flow

Inactive Publication Date: 2008-06-18
SUN YAT SEN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of relatively poor mechanical properties and thermal properties, low ion conductivity and poor solubility of polymethylethylene carbonat

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  • Cross-lined polymethyl ethylene carbonate polymer electrolyte membrane and preparation method thereof

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[0021] Preparation of polymethylethylene carbonate terpolymer: Add 1.0g of supported catalyst zinc dicarboxylate to a 0.5L autoclave, connect the reactor to the vacuum system, and then dry the added catalyst at 80°C in a vacuum After drying, cool to room temperature, add propylene oxide and cyclic anhydride to the autoclave, and add carbon dioxide, heat, start stirring, adjust the pressure of carbon dioxide to 4.0-6.0MPa, and the reaction temperature to 50-70℃ The reaction time is 10 to 72 hours. The reaction is completed, the reactor is cooled, carbon dioxide is released, the viscous polymer in the reactor is taken out, the polymer obtained is dissolved in chloroform, and the catalyst in the system is removed with a 5% dilute hydrochloric acid solution. After washing with distilled water, the chloroform solution of the obtained copolymer is concentrated and then precipitated with ethanol. The white product obtained is a terpolymer of carbon dioxide, propylene oxide and cyclic anh...

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Abstract

The present invention discloses cross-linked polymethacrylic ethylene carbonic acid ester polymer electrolyte membrane and the preparation method. The polymer electrolyte membrane consists of cross-linked polymethacrylic ethylene carbonic acid ester polymer and electrolyte solution including conductive lithium salt and non-protonic solvent. The preparation method adopts carbon dioxide, epoxy dimethylmethane and unsaturated acid anhydride which are synthesized into polymethacrylic ethylene carbonic acid ester trivalent copolymer with special functional group under the role of catalyst dyadic carboxylic acid zinc. Then the trivalent copolymer is under the cross-linking reaction so as to get the dry polymethacrylic ethylene carbonic acid ester polymer membrane. Afterwards, the dry membrane is immerged into the liquid electrolyte solution for activation, thus obtaining the cross-linked polymethacrylic ethylene carbonic acid ester polymer electrolyte membrane. The polymer electrolyte membrane prepared by the present invention has the advantages of high mechanical performance, good thermal performance and high ion electric conduction. The present invention with low cost and simple process is applicable to the industrialized production.

Description

technical field [0001] The invention relates to a polymer electrolyte, in particular to a cross-linked polymethylethylene carbonate polymer electrolyte membrane and its preparation technology. Background technique [0002] In addition to the characteristics of liquid organic electrolyte lithium-ion batteries, polymer lithium-ion batteries also have the advantages of high energy density, no electrolyte leakage, good safety, flexible design, and easy large-scale production. In particular, the safety and reliability of polymer lithium-ion batteries are higher. In the case of abnormal use, overcharge and overdischarge, impact, crushing, puncture, etc., polymer lithium-ion batteries will not explode. Therefore, it is more Suitable for military, space technology, power battery and other applications. [0003] Therefore, since the emergence of polymer lithium-ion batteries, it has attracted much attention. Lithium battery research institutions and manufacturers at home and abroad ...

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Application Information

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IPC IPC(8): C08J5/18C08L69/00C08K5/56
Inventor 孟跃中禹筱元王拴紧肖敏宋鹏飞招启强刘国庆
Owner SUN YAT SEN UNIV
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