Micro joint gel state lithium ion battery polymer electrolyte film and its making method

A technology for lithium ion batteries and electrolyte membranes, which is applied in the field of micro-crosslinked polymer membranes containing nitrile groups and carboxyl groups and their preparation, can solve the problems of poor mechanical properties, difficulty in large-scale industrial production, and low electrical conductivity, and achieves good The effect of microporous structure and liquid absorption rate, good ion transport performance, excellent thermal stability performance
CN101127408AActive Publication Date: 2008-02-20GUANGZHOU TINCI MATERIALS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU TINCI MATERIALS TECH
Publication Date
2008-02-20

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Abstract

The utility model relates to a polymer electrolyte film for a micro cross-linking gel state lithium-ion battery and a preparation method, which is used for making the battery. The utility model discloses the poly-acrylonitrile-methyl methacrylate with the cross-linking degree of 0.1 to 0.4 % is obtained after suspension polymerization with the monomer component mass ratio of a methyl methacrylate and an acrylonitrile of 1:9 to 4:6, then the poly-acrylonitrile-methyl methacrylate is dissolved by a polar organic solvent and coated on a formed die, finally the micro cross-linking degree polymer electrolyte film is obtained when the film is removed from the formed die, the thickness of the film is 20 to 50um, the tensile strength is 7 to 22Mpa, and the average hole diameter is 0.1to 3um. The utility model has advantages of good conductivity, good absorbing capability, good heat stability, good electrochemical stability and good mechanical property under the ambient temperature, and simple manufacturing operation, high transforming rate of polymer, economy and environmental friendliness.
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Description

technical field

[0001] The invention relates to a micro-crosslinked polymer electrolyte membrane and a preparation method thereof, in particular to a micro-crosslinked polymer membrane containing nitrile and carboxyl groups and a preparation method thereof. Background technique

[0002] Since the 1990s, lithium-ion batteries with liquid electrolytes have been widely used in various electronic appliances due to their unique advantages such as high energy, high operating voltage, wide application temperature range, no heavy metal pollution, and good safety performance. Polymer lithium-ion battery is a new type of battery developed on the basis of liquid lithium-ion batteries. In addition to the advantages of liquid lithium-ion batteries, it also has the advantage of better safety performance due to the use of an electrolyte that is not easy to flow. It can be made into ultra-thin batteries of any shape and size, so it has a wider range of applications. At present, polymer lith...

Claims

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