Method for manufacturing electrospinning of high-performance polyarylether resin lithium battery diaphragm

A lithium battery diaphragm, high-performance technology, applied in the direction of battery pack components, circuits, electrical components, etc., can solve the problem of battery self-closing performance degradation, and achieve good self-closing performance, good wetting performance, and excellent heat resistance. Effect

Inactive Publication Date: 2009-10-21
SHENYANG INST OF AERONAUTICAL ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the polyarylether resin lithium battery separator prepared by electrospinning has high ion permeability and good wetting performance, and its temperature resistance is significantly improved compared with polyolefin separators, and its thermal dimensional stability is significantly improved. But the self-shutdown performance of the battery is reduced

Method used

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  • Method for manufacturing electrospinning of high-performance polyarylether resin lithium battery diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Polyarylether sulfone ketone (PPESK) was dissolved in N, N-dimethylacetamide (DMAc) to prepare a solution with a concentration of 20 wt%. Polyvinylidene fluoride (PVDF) was dissolved in N-methylpyrrolidone (NMP) solvent to prepare a solution with a concentration of 25 wt%. Put the above two solutions into different syringe pumps 2 and 3 of the electrospinning equipment respectively, and connect the nozzle of the syringe pump to one pole of the high-voltage power supply through a wire, and a pole on the other side about 15 cm away from the syringe pump. A metal roller electrode connected to the other pole of the high-voltage power supply acts as a collection device. Slowly increase the voltage of the power supply 1 to 25KV. Under the action of the high voltage, the two solutions are sprayed out from their respective injection pump nozzles. The high-performance polyarylether resin fiber 4 and the general engineering resin fiber 5 are collected in the form of non-woven On...

Embodiment 2

[0024] Polyaryletherketone (PEK-C) was dissolved in dichloromethane to prepare a solution with a concentration of 12 wt%. Polyacrylonitrile (PAN) was dissolved in N,N-dimethylacetamide (DMAC) solvent to prepare a solution with a concentration of 10 wt%. Put the above two solutions into different syringe pumps 2 and 3 of the electrospinning equipment respectively, and connect the nozzle on the syringe pump to one pole of the high-voltage power supply through a wire, and the other side about 10 cm away from the syringe pump is A flat metal electrode connected to the other pole of the high-voltage power supply serves as a collecting device. Slowly increase the voltage of power supply 1 to 20KV. Under the action of high voltage, the two solutions are ejected from the nozzles of their respective syringe pumps. High-performance polyarylether resin fibers 4 and general-purpose engineering resin fibers 5 are collected in the form of non-woven fabrics. On the metal collection device 6...

Embodiment 3

[0027] Polyether ketone (PPEK) was dissolved in N-methylpyrrolidone (NMP) to prepare a solution with a concentration of 15 wt%. Polymethyl methacrylate (PMMA) was dissolved in N,N-dimethylacetamide (DMAc) solvent to prepare a solution with a concentration of 10 wt%. Put the above two solutions into different syringe pumps 2 and 3 of the electrospinning equipment respectively, and connect the nozzle of the syringe pump to one pole of the high-voltage power supply through a wire, and a pole on the other side about 20 cm away from the syringe pump. A metal mesh electrode connected to the other pole of the high-voltage power supply acts as a collection device. Slowly increase the voltage of the power supply 1 to 23KV. Under the action of the high voltage, the solution is ejected from the nozzle of the syringe pump with high-performance polyarylether resin fibers 4 and general-purpose engineering resin fibers 5, which are collected in the form of non-woven fabrics in the metal coll...

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Abstract

The invention provides a method for manufacturing electrospinning of a high-performance polyarylether resin lithium battery diaphragm, belonging to the technical field of high-voltage electrospinning. The method comprises the following steps of: using high-performance polyarylether resin solution and all-purpose engineering resin solution (or melt); simultaneously, mixing the electrospinning; and with intertwining which is caused by the flagellating effect of shooting flow in the process of spinning, forming a jointly weaved network structure so that polyarylether fiber is compounded with all-purpose resin fiber to obtain high-performance polyarylether fiber non-woven fabrics. The non-woven fabrics have the good heat-resistant performance of the polyarylether resin and the good self-closing performance of the all-purpose engineering resin. In addition, the non-woven fabrics also have good ion permeability and good wetting performance to electrolyte fluid so that the performance of the lithium battery with the polyarylether diaphragm can be obviously improved. The lithium battery with the polyarylether diaphragm has wide application in the fields such as national defense, aviation, space flight, civilian use, industry, and the like, and has higher application value.

Description

technical field [0001] The invention belongs to the field of high-voltage electrospinning, and relates to a preparation method of a rechargeable lithium battery diaphragm, in particular to a preparation method of a high-performance soluble polyarylether resin lithium battery diaphragm. Background technique [0002] The rechargeable lithium-ion battery is a green and environmentally friendly non-polluting battery. It not only has the characteristics of high specific energy, high specific power, long cycle life, and no memory effect, but also has the characteristics of high safety performance, strong reliability, and stable charge and discharge performance. It is widely used in many high-tech fields such as automobile, mobile communication, aerospace, national defense and military industry. Lithium batteries are mainly composed of positive electrodes, negative electrodes, electrolytes, separators, and casings. Among them, the separator is an important part of the lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16D01D5/00H01M50/403H01M50/44
CPCY02E60/12Y02E60/10
Inventor 陆春陈平齐文于祺崔天放
Owner SHENYANG INST OF AERONAUTICAL ENG
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