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Fluorine-containing single-ion conductor polymer electrolyte and preparation method and application thereof

A conductive polymer and single-ion technology, applied in the manufacture of electrolyte batteries, solid electrolyte fuel cells, non-aqueous electrolyte batteries, etc., can solve the problem of reducing battery energy efficiency and service life, reducing battery charge and discharge stability, and low cation migration number and other issues, to achieve the effect of improving battery safety, satisfying mechanical properties, and high ion migration number

Active Publication Date: 2017-06-23
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the stronger interaction of cations with the polymer backbone than anions with the polymer chain, the migration is slow, resulting in a too low cation migration number
At the same time, this difference in migration rate will lead to a concentration gradient in the electrolyte salt, forming a concentration polarization, generating a polarization voltage opposite to the applied electric field, hindering the migration of ions, reducing the stability of battery charge and discharge, and reducing the energy efficiency and energy efficiency of the battery. service life

Method used

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  • Fluorine-containing single-ion conductor polymer electrolyte and preparation method and application thereof
  • Fluorine-containing single-ion conductor polymer electrolyte and preparation method and application thereof
  • Fluorine-containing single-ion conductor polymer electrolyte and preparation method and application thereof

Examples

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Embodiment 1

[0048] Add 0.025mol of hexafluorobutyl methacrylate, 0,025mol of sodium allylsulfonate, 5ml of methanol and 0.020g of azobisisobutyronitrile into a three-necked flask, and place it in an oil bath at 65°C under the protection of nitrogen. In the device, stir and reflux for 12 hours. The product was washed 3 times with methanol and water respectively to remove unreacted monomer and initiator. The product is dissolved in N,N-dimethylformamide and then precipitated in a precipitant, and the precipitate is repeatedly dissolved and precipitated three times, and dried at 80°C to obtain a fluorine-containing monoionic conductor polymer with sulfonate functional group.

[0049] Fully dissolve 0.5 g of the above-mentioned dried polymer in 15 ml of N,N-dimethylformamide, leave it in vacuum for 2 hours to defoam, cast the solution on a clean glass plate into a film, and dry at 60°C for 24 hours. Place the cast film in 0.5mol / L H 2 SO 4 In the solution, replace with a new 0.5mol / L H every 6h...

Embodiment 2

[0073] Add 0.025mol of trifluoroethyl methacrylate, 0,050mol of sodium p-styrene sulfonate, 5ml of methanol and 0.050g of azobisisobutyronitrile into a three-necked flask, and place it in an oil bath at 65°C under the protection of nitrogen. In the device, stir and reflux for 12 hours. The product was washed 3 times with methanol and water respectively to remove unreacted monomer and initiator. The product is dissolved in N,N-dimethylformamide and then precipitated in a precipitant, and the precipitate is repeatedly dissolved and precipitated three times, and dried at 80°C to obtain a fluorine-containing monoionic conductor polymer with sulfonate functional group.

[0074] Fully dissolve 0.5 g of the above-mentioned dried polymer in 15 ml of N,N-dimethylformamide, leave it in vacuum for 2 hours to defoam, cast the solution on a clean glass plate into a film, and dry at 60°C for 24 hours. A fluorine-containing single-ion conductor polymer electrolyte membrane with sodium sulfonat...

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Abstract

The invention relates to a fluorine-containing single-ion conductor polymer electrolyte and a preparation method and an application thereof and relates to the single-ion conductor polymers. According to the fluorine-containing single-ion conductor polymer electrolyte, a polymerization reaction is performed on a fluorine-containing functional monomer and a monomer containing an anion functional group, so that a polymer electrolyte membrane is obtained with anions being fixed on a macromolecular chain but cations migrating. The fluorine-containing single-ion conductor polymer electrolyte membrane is prepared by the following steps: adding the fluorine-containing functional monomer, the monomer containing an anion functional group, a solvent and an initiator into a sealable reactor, performing a reflux condensation reaction under inert gas protection to obtain a polymer, and then settling, washing and drying the polymer to obtain the fluorine-containing single-ion conductor polymer; and dissolving the obtained fluorine-containing single-ion conductor polymer in an organic solvent to obtain a polymer solution, and then making a membrane. The fluorine-containing single-ion conductor polymer electrolyte can serve as a polymer electrolyte of a chemical battery for assembling the chemical battery.

Description

Technical field [0001] The invention relates to a single-ion conductor polymer, in particular to a fluorine-containing single-ion conductor polymer electrolyte, and a preparation method and application thereof. Background technique [0002] Chemical batteries are mainly composed of three key materials: positive electrode, negative electrode and electrolyte. Electrolyte is an indispensable part of the battery. It conducts current and transports ions between the positive and negative electrodes, which largely determines the battery’s performance. The working mechanism is the guarantee of battery performance. The polymer electrolyte can not only improve the safety of the battery, but also has a light weight and a thinner shape, which is convenient for design and manufacture. [0003] Polymer electrolytes can be divided into two-ion conductor transmission type and single-ion transmission type according to the types of conductive carriers in the system. In the prior art, a large amount...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M10/0565H01M10/058
CPCH01M8/1039H01M10/0565H01M10/058Y02E60/10Y02E60/50Y02P70/50
Inventor 赵金保纪盼莹方军
Owner XIAMEN UNIV