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

A conductor polymer, single-ion technology, used 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 and other problems, to achieve the effect of improving battery safety, satisfying mechanical properties, and high ion migration number.

Active Publication Date: 2020-01-07
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 its preparation method and application
  • Fluorine-containing single ion conductor polymer electrolyte and its preparation method and application
  • Fluorine-containing single ion conductor polymer electrolyte and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Add 0.025mol of hexafluorobutyl methacrylate, 0.025mol of sodium allyl sulfonate, 5ml of methanol and 0.020g of azobisisobutyronitrile into a three-necked flask, and place it in a 65°C oil bath under nitrogen protection In the device, stir and reflux for 12h. The product was washed three times with methanol and water to remove unreacted monomer and initiator. The product was dissolved in N, N-dimethylformamide and then precipitated in a precipitating agent. The dissolution and precipitation were repeated three times and dried at 80°C to obtain a fluorine-containing single ion conductor polymer with sulfonate functional groups.

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

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 a 65°C oil bath under nitrogen protection In the device, stir and reflux for 12h. The product was washed three times with methanol and water to remove unreacted monomer and initiator. The product was dissolved in N, N-dimethylformamide and then precipitated in a precipitating agent. The dissolution and precipitation were repeated three times and dried at 80°C to obtain a fluorine-containing single ion conductor polymer with sulfonate functional groups.

[0074] Fully dissolve 0.5g of the above-mentioned dried polymer in 15ml of N,N-dimethylformamide, let stand in vacuum for 2h to defoam, cast the solution on a clean glass plate to form a film, and dry at 60°C for 24h. A fluorine-containing single-ion conductor polymer electrolyte membrane with sodium sulfonate functional groups is obtained.

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Abstract

The invention relates to a fluorine-containing single-ion conductor polymer electrolyte, a preparation method and application thereof, and relates to a single-ion conductor polymer. The fluorine-containing single-ion conductor polymer electrolyte is a polymer electrolyte membrane in which fluorine-containing functional group monomers and anion-containing functional group monomers undergo copolymerization reactions, anions are fixed on polymer chains, and only cations can migrate. Add fluorine-containing functional group monomers, anion-containing functional group monomers, solvents, and initiators into a sealable reactor, reflux and condense under the protection of an inert gas to obtain a polymer, and then precipitate, wash, and dry to obtain fluorine-containing A single ion conductor polymer; dissolving the obtained fluorine-containing single ion conductor polymer in an organic solvent to obtain a polymer solution, and then making a membrane to obtain a fluorine-containing single ion conductor polymer electrolyte membrane. The fluorine-containing single-ion conductor polymer electrolyte can be used 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 essential part of the battery. It plays the role of conducting current and transporting ions between the positive and negative electrodes, which largely determines the battery's The working mechanism is the guarantee of battery performance. The polymer electrolyte can not only improve the safety of the battery, but also be light and thin, which is convenient for design and manufacture. [0003] Polymer electrolytes can be divided into dual ion conductor transport type and single ion transport type according to the type of conductive carriers in the system. In the prior art, a lot of work has been carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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