A kind of preparation method and application of polymer electrolyte material for lithium battery

A technology of electrolyte materials and polymers, applied in the direction of lithium batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve problems such as electrical conductivity and mechanical properties that cannot be taken into account, safety hazards, etc., to achieve improved safety performance, high safety performance, The effect of simplifying the preparation process

Active Publication Date: 2016-06-29
GUANGZHOU TINCI MATERIALS TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium-ion battery polymer with good mechanical properties, electrical conductivity and bonding properties for the potential safety hazards of lithium-ion batteries and the inability to balance the electrical conductivity and mechanical properties of existing polymer electrolyte materials. electrolyte material

Method used

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  • A kind of preparation method and application of polymer electrolyte material for lithium battery
  • A kind of preparation method and application of polymer electrolyte material for lithium battery
  • A kind of preparation method and application of polymer electrolyte material for lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0032] First, polyethylene glycol (MW=300) is added to a four-necked bottle with a thermometer, a stirrer, a feeding tube, and a condensing tube, and 2 drops of catalyst are added dropwise, and IPDI is added dropwise, wherein NCO:OH (molar ratio) is 1.25:1. After reacting at 25°C for 4 hours, add ethylene glycol monoallyl ether, wherein the remaining NCO:OH (molar ratio) is 1:1.2, and the temperature is controlled at 65°C. During the reaction process, DEC was continuously added to adjust the temperature of the system, and the conversion rate of NCO was measured. When the conversion rate reached 99%, the reaction was stopped to obtain a prepolymer. The molecular weight of the prepolymer is 580,000, and the dispersion coefficient is 1.02.

[0033] Accurately weigh a certain amount of prepolymer and place it in a sample bottle, add 20% by weight of active monomer PETA, add 0.1% by weight of photoinitiator 4265, stir well, apply it on a release paper, and place it in a UV curing d...

Embodiment 2

[0035] Polyethylene glycol (M W =2000) into a four-neck flask equipped with a thermometer, agitator, feeding tube, and condenser, dropwise add 2 drops of catalyst, and dropwise add IPDI, wherein NCO:OH (molar ratio) is 3:1. React at 50°C for 4h Finally, add ethylene glycol monoallyl ether, wherein the remaining NCO:OH (molar ratio) is 1:1.2, and the temperature is controlled at 85°C. During the reaction process, DMC was continuously added to adjust the temperature of the system, and the conversion rate of NCO was measured. When the conversion rate reached 99%, the reaction was stopped to obtain a prepolymer. The molecular weight of the prepolymer is 30,000, and the dispersion coefficient is 1.33.

[0036] Accurately weigh a certain amount of prepolymer and place it in a sample bottle, add 0.5% by weight of active monomer PETA, add 12% by weight of initiator 4265, stir well, apply it on a release paper, and place it under a UV curing device Irradiate for 90 seconds. After be...

Embodiment 3

[0038] Polyethylene glycol (MW=2000), amino-terminated polysiloxane (M W About 1700) into a four-neck flask with a thermometer, agitator, feeding tube, and condenser, drop 2 drops of catalyst, drop IPDI, where NCO:OH (molar ratio) is 3:1. 50 ° C reaction After 4h, add ethylene glycol monoallyl ether, wherein the remaining NCO:OH (molar ratio) is 1:1.2, and the temperature is controlled at 75°C. During the reaction process, the mixed solvent (DMC:DEC:EC=1:1:1) was continuously added to adjust the temperature of the system, and the conversion rate of NCO was measured. When the conversion rate reached 99%, the reaction was stopped to obtain a prepolymer. The molecular weight of the prepolymer is 30,000, and the dispersion coefficient is 1.33.

[0039] Accurately weigh a certain amount of prepolymer and place it in a sample bottle, add 20% by weight of active monomer PETA, 12% by weight of initiator 4265 and 0.5% by weight of hexafluorobutyl acrylate, stir well, and apply on rele...

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Abstract

The invention relates to a preparation method of a polymer electrolyte material for lithium batteries. The preparation method is suitable for lithium battery manufacturers, and comprises the following steps: (1) reacting and sealing terminals of micromolecule coupling agents of multi-functional groups of silane coupling agents, titanate and isocyanate, as well as ethylene glycol compounds modified by amino-terminated amino polysiloxane that is end capped by reactive hydrogen, alkyl hydroxyl silicone oil, polyether glycol, polyester dibasic alcohol and organic phosphate to obtain the prepolymer; (2) adding photoinitiators, cross-linked monomers and modified monomers into the prepolymer for homogenizing to obtain a solidified system; (3) enabling a some base material to be coated with the solidified system for molding by ultraviolet light curing. The polymer electrolyte material provided by the invention is favorable in mechanical property, electric conductivity and cohesive property, and the preparation method is quick and suitable for batch manufacturing.

Description

technical field [0001] The invention relates to lithium battery polymer electrolyte technology, in particular to a polymer electrolyte material and a preparation method thereof. This product can be applied to polymer lithium-ion batteries, and has the dual functions of containing electrolyte and electrode separator. Lithium batteries made of this material can solidify liquid electrolyte materials and reduce the chemical interaction between positive and negative electrode materials and electrolyte at high temperatures. reaction, while improving the heat shrinkage resistance of the electrolyte membrane, reducing the probability of short circuit inside the positive and negative electrodes, thereby improving the thermal shock resistance of the battery, preventing combustion and explosion, improving safety, and simplifying the manufacturing process of lithium batteries , improve the specific energy density, processability and safety of the battery. Background technique [0002] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565
CPCH01M10/052H01M10/0565Y02E60/10
Inventor 户献雷张若昕徐金富章明秋阮文红
Owner GUANGZHOU TINCI MATERIALS TECH
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