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Gel polymer electrolyte based on non-woven fabrics for lithium ion battery and preparation method of gel polymer electrolyte

A gel polymer, lithium-ion battery technology, applied in the field of lithium-ion batteries, can solve the problems of extremely difficult to widely use, high production cost, poor mechanical strength, etc., and achieves low production cost, high mechanical strength, and high electrical conductivity. Effect

Inactive Publication Date: 2013-04-03
FUDAN UNIV +1
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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 overcome the disadvantages of existing gel polymer electrolytes, such as poor mechanical strength, high production cost, and extremely difficult to be widely used in large-capacity, high-power, high-energy-density lithium-ion batteries, and provide a class of high conductivity, High ion migration number, good mechanical properties, high safety performance, stable chemical properties, low production cost, good compatibility with common electrode materials Non-woven modified lithium ion gel polymer electrolyte

Method used

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  • Gel polymer electrolyte based on non-woven fabrics for lithium ion battery and preparation method of gel polymer electrolyte
  • Gel polymer electrolyte based on non-woven fabrics for lithium ion battery and preparation method of gel polymer electrolyte
  • Gel polymer electrolyte based on non-woven fabrics for lithium ion battery and preparation method of gel polymer electrolyte

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Dissolve PVDF in DMAc at a mass percentage of 10%, at 40 oHeated and stirred in a water bath of C for 2 hours to obtain a clear and homogeneous solution, and cooled to room temperature.

[0032] (2) Fix the non-woven fabric (material: PP / PE) on a smooth and clean glass plate, pour the prepared PVDF solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C The solvent was evaporated on the heating plate, and after 4 hours, it was removed and cooled to room temperature. Put the surface of the non-woven fabric poured with PVDF close to the glass plate to fix the non-woven fabric, pour the coating solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C The solvent was evaporated on the heating plate, and after 4 hours, it was removed and cooled to room temperature to obtain a PVDF composite non-woven fabric (PP / PE).

[0033] (3) After cutting the PVDF composite non-woven fabric into an appropriate size, place it in a...

Embodiment 2

[0035] (1) Dissolve PVDF-HFP in DMAc at a mass percentage of 10%, at 60 o C in a water bath with heating and stirring for 2 hours to obtain a clear and homogeneous solution. Cool to room temperature and set aside.

[0036] (2) Fix the non-woven fabric (PP / PE) on a smooth and clean glass plate, pour the prepared PVDF-HFP solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C The solvent was evaporated on the heating plate, and after 4 hours, it was removed and cooled to room temperature. Put the surface of the non-woven fabric that has poured PVDF-HFP close to the glass plate to fix the non-woven fabric, pour the coating solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C The solvent was evaporated on the heating plate, and after 4 hours, it was removed and cooled to room temperature to obtain a PVDF-HFP composite non-woven fabric (PP / PE).

[0037] (3) After cutting the PVDF-HFP composite non-woven fabric into an app...

Embodiment 3

[0039] (1) Dissolve PVDF in DMAc at a mass percentage of 10%, at 80 o C in a water bath with heating and stirring for 1.5 hours to obtain a clear and homogeneous solution. Cool to room temperature and set aside.

[0040] (2) Fix the non-woven fabric (soybean fiber) on a smooth and clean glass plate, pour the prepared PVDF solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C The solvent was evaporated on the heating plate, and after 4 hours, it was removed and cooled to room temperature. Put the surface of the non-woven fabric poured with PVDF close to the glass plate to fix the non-woven fabric, pour the coating solution on the non-woven fabric, scrape it with a scraper, and place it at 80 o C. Volatile solvent on the heating plate, take it off after 4 hours and cool to room temperature to obtain PVDF composite non-woven fabric (soybean fiber).

[0041] (3) After cutting the PVDF composite non-woven fabric into an appropriate size, place it in ...

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Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to gel polymer electrolyte based on non-woven fabrics for a lithium ion battery and a preparation method of the gel polymer electrolyte. The gel polymer electrolyte consists of a compound obtained by compounding the non-woven fabrics and other high molecular materials, and liquid electrolyte. The other high molecular materials comprise homopolymers, copolymers or blends of polyether, polyacrylonitrile, polyacrylate and polyvinylidene fluoride (PVDF). The liquid electrolyte is added into the compound to obtain the gel polymer electrolyte. The gel polymer electrolyte not only has the characteristics of large mechanical strength of the non-woven fabrics and low production cost, but also has the advantages of high conductivity, wide electrochemical window, good circulation property and high security property. The gel polymer electrolyte provided by the invention can be used for the lithium ion battery with large capacity, high power and high energy density.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a gel polymer electrolyte for lithium ion batteries and a preparation method thereof. Background technique [0002] As a new type of chemical power source, lithium-ion batteries have the advantages of high energy density, environmental friendliness, and no memory effect. Since their commercialization, lithium-ion batteries have been widely used in various portable electronic devices such as notebook computers, digital cameras, and mobile phones. It is also one of the ideal energy storage devices for hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), pure electric vehicles (EV) and small smart grids. However, since LiPF 6 The wide application of organic electrolytes (sensitive to moisture, flammable, and explosive) makes the safety and reliability of large-capacity lithium-ion batteries questioned. In order to solve the safety prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCY02E60/10Y02P70/50
Inventor 朱玉松肖时英杨亚琼吴宇平王丹何丹农
Owner FUDAN UNIV
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