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Method for preparing solid polymer electrolyte by doping magnetic field orientation organic modified magnetic nanofibers

A solid polymer, magnetic nanotechnology, applied in the manufacture of electrolytes, non-aqueous electrolyte batteries, electrolyte batteries, etc., can solve the problems of PEO solid electrolyte film formation, thermal stability and mechanical strength reduction, restricting PEO solid electrolytes, etc. To achieve the effect of suppressing dendrites, good compatibility and improving safety

Active Publication Date: 2020-09-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film-forming properties, thermal stability and mechanical strength of PEO solid electrolytes may be reduced, thus restricting the development of PEO solid electrolytes.

Method used

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  • Method for preparing solid polymer electrolyte by doping magnetic field orientation organic modified magnetic nanofibers
  • Method for preparing solid polymer electrolyte by doping magnetic field orientation organic modified magnetic nanofibers
  • Method for preparing solid polymer electrolyte by doping magnetic field orientation organic modified magnetic nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of magnetic sepiolite: first, 4.0g FeCl 3 ·6H 2 O, 4.0g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, and stirred in a 250mL flask at 25°C for 20min; then, under vigorous stirring at 40°C, 6.0g of sepiolite was added to the flask, and after 20min, ammonia water was added to the stirring solution to pH ~ 9.0, and stirred in a water bath at 60 °C for 4 hours, when the precipitate was cooled to room temperature, washed three times with deionized water and ethanol.

[0034] 2. Use KH550 to organically modify the surface of magnetic sepiolite: first, under magnetic stirring at 40°C, disperse 6.0g magnetic sepiolite in 100g deionized water, then add 2.0g KH550 into the mixture solution, A homogeneous slurry is obtained. Then the pH of the solution was adjusted to about 5.0, stirred and heated at 80 °C for 4 hours; after the solution was cooled, the precipitate was washed with deionized water and ethanol several times.

[0035] 3. Preparation of ma...

Embodiment 2

[0040] 1. Preparation of magnetic sepiolite: first, 2.0g FeCl 3 ·6H 2 O, 2.0g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, and stirred in a 250mL flask at 25°C for 20min; then, under vigorous stirring at 40°C, 6.0g of sepiolite was added to the flask, and after 20min, ammonia water was added to the stirring solution to pH ~ 9.0, and stirred in a water bath at 60 °C for 4 hours, when the precipitate was cooled to room temperature, washed three times with deionized water and ethanol.

[0041] 2. Use KH550 to modify the surface of magnetic sepiolite: first, under magnetic stirring at 40°C, disperse 6.0g of magnetic sepiolite in 100g of deionized water, then add 2.0g of KH550 into the mixture solution to obtain Uniform slurry. Then the pH of the solution was adjusted to about 5.0, stirred and heated at 80 °C for 4 hours; after the solution was cooled, the precipitate was washed with deionized water and ethanol several times.

[0042] 3. Preparation of magnetically o...

Embodiment 3

[0045] 1. Preparation of magnetic sepiolite: first, 2.0g FeCl 3 ·6H 2 O, 2.0g FeSO 4 ·7H 2 O was dissolved in 150mL deionized water, and stirred in a 250mL flask at 25°C for 20min; then, under vigorous stirring at 40°C, 6.0g of sepiolite was added to the flask, and after 20min, ammonia water was added to the stirring solution to pH ~ 9.0, and stirred in a water bath at 60 °C for 4 hours, when the precipitate was cooled to room temperature, washed three times with deionized water and ethanol.

[0046] 2. Use KH550 to modify the surface of magnetic sepiolite: first, under magnetic stirring at 40°C, disperse 6.0 g of magnetic sepiolite in 100 g of deionized water, then add 1.0 g of KH550 into the mixture solution to obtain Uniform slurry. Then the pH of the solution was adjusted to about 5.0, stirred and heated at 80 °C for 4 hours; after the solution was cooled, the precipitate was washed with deionized water and ethanol several times.

[0047] 3. Preparation of magneticall...

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Abstract

The invention discloses a method for preparing a solid polymer electrolyte by doping magnetic field oriented organic modified magnetic nanofibers. The high-ionic-conductivity solid polymer electrolytefor the all-solid-state lithium battery is prepared by utilizing magnetic field oriented organic modified magnetic sepiolite, and organic modified magnetic sepiolite particles are directionally arranged in the PEO polymer electrolyte under the action of a magnetic field so that the polymer solid electrolyte with high ionic conductivity and high safety is obtained.

Description

technical field [0001] The invention belongs to the field of new energy battery materials, and in particular relates to a method for preparing a solid polymer electrolyte by doping magnetic field-oriented organically modified magnetic nanofibers. Background technique [0002] In recent years, accidents such as lithium-ion battery leakage, flammability, and explosion caused by short circuit have seriously threatened the safety of people's lives and property. Solid electrolytes have attracted much attention as a substitute for flammable organic liquid electrolytes. Solid-state electrolytes are composed of two categories: inorganic electrolytes and polymer electrolytes (SPEs). The inorganic electrolyte membrane has high hardness and brittleness, and the interface resistance with the electrode is high. Polyethylene oxide (PEO) solid polymer electrolytes have gained wide acceptance due to their flexibility and ease of processing. However, several reasons, such as low ionic con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/0565B82Y30/00
CPCB82Y30/00H01M10/0565H01M10/058H01M2200/00H01M2300/0091Y02E60/10Y02P70/50
Inventor 阚永春韩龙飞宋磊胡源
Owner UNIV OF SCI & TECH OF CHINA
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