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Polymer electrolyte isolating membrane, preparation method and use thereof

An electrolyte and separator technology, applied in circuits, electrical components, battery pack components, etc., can solve the problems of easy leakage of liquid electrolytes, difficult to form gel electrolytes, poor mechanical properties, etc., and achieve excellent battery performance. The effect of reducing liquid leakage and excellent mechanical properties

Inactive Publication Date: 2012-04-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems that the existing lithium-ion battery liquid electrolyte is easy to leak and has poor safety performance, or the gel electrolyte is difficult to form and has poor mechanical properties, and provides a polymer electrolyte separator, its preparation method and its application

Method used

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  • Polymer electrolyte isolating membrane, preparation method and use thereof
  • Polymer electrolyte isolating membrane, preparation method and use thereof

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specific Embodiment approach 1

[0015] Specific Embodiment 1: In this embodiment, the polymer electrolyte separator consists of 0.1 to 10 parts by weight of lithium salt, 2 to 20 parts of organic solvent, 10 to 80 parts of photosensitive monomer, and 0.01 to 4 parts of Photoinitiator and 0.1 to 5 parts of nano filler; wherein the lithium salt is LiClO 4 、LiPF 6 、LiCF 3 SO 3 、LiBF 4 One or a mixture of several of them; the organic solvent is composed of ethylene carbonate and propylene carbonate in a mass ratio of 1:1; the photosensitive monomer is composed of triethoxy acrylate, polyethylene glycol di Acrylate, aliphatic polyurethane diacrylate and ethoxylated trimethylolpropane triacrylate are composed of 2-4:15-20:6-8:0-1 in mass ratio, wherein lithium salt and photosensitive monomer are total The molar ratio of the ethoxy group is 1: 8 ~ 10; the photoinitiator is composed of benzoin dimethyl ether and 1-hydroxycyclohexyl phenyl ketone in a mass ratio of 1: 1 ~ 2; the nano filler is nano al 2 o 3 , ...

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the photosensitive monomer is composed of triethoxy acrylate, polyethylene glycol diacrylate, aliphatic polyurethane diacrylate and ethoxylated trihydroxy Methyl propane triacrylate is composed in mass ratio of 2:15:6:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the molar ratio of the lithium salt to the total ethoxy groups in the photosensitive monomer is 1:9. Others are the same as in the first or second embodiment.

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Abstract

A polymer electrolyte isolating membrane, preparation method and use thereof, relating to a polymer electrolyte isolating membrane, preparation method and use thereof. The invention solves the problem in the current lithium ion battery liquid electrolyte that is easy to leak and hard to shape the gel state electrolyte and has bad safe performance and mechanical performance. The polymer electrolyte isolating membrane is made of a lithium salt, an organic solvent, a photosensitive monomer, a photoinitiator and a nano-filler. The method includes the steps as follows: adding the lithium salt into the organic solvent, magnetically stirring them to obtain the electrolyte solution; adding the photoinitiator into the photosensitive monomer, magnetically stirring them to form a mixed monomer; adding the electrolyte solution and the nano-filler into the mixed monomer; ultrasonically shaking them to obtain the mixed solution; coating the mixed solution on the surface of the release material; radiating on the surface of the release material coated with the mixed solution via an ultraviolet light to obtain the polymer electrolyte isolating membrane. The polymer isolating membrane of the invention has the advantages of good mechanical performance, easy formation, high conductivity and good battery performance after the battery is assembled.

Description

technical field [0001] The invention relates to a polymer electrolyte separation membrane, its preparation method and application. Background technique [0002] Due to a series of advantages such as high energy density, long cycle life, high open circuit voltage, safety and stability, lithium-ion batteries have attracted more and more attention from the battery industry at home and abroad. Its research, development and production are hot topics in the battery industry. [0003] The electrolyte separator in the lithium-ion battery system is an electronic insulator and an ion carrier, which plays the role of transporting lithium ions between the positive and negative electrodes. Existing lithium-ion batteries have the problems of easy leakage of liquid electrolyte and poor safety performance, or difficult molding of gel electrolyte and poor mechanical properties. Due to its outstanding characteristics such as good ionic conductivity, light weight, good elasticity, and easy f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16C08F290/06C08F2/48
CPCY02E60/12Y02E60/10
Inventor 白永平黄通姜波邵路
Owner HARBIN INST OF TECH
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