High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof

An aromatic polymer, ionic liquid technology, applied in organic diaphragms, chemical instruments and methods, circuits, etc., can solve the problems of methanol performance is not very high, ionic conductivity is low, unusable, etc., to achieve good ionic conductivity, strong Cationic activity, not easy to run off effect

Active Publication Date: 2011-01-05
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the instability of ion channels, the performance of this kind of polymer membrane in blocking methanol is not very high
In addition, the ionic conductivity is limited by the weak acidity of the benzenesulfonic acid group and the low cationic activity under anhydrous conditions, so it cannot be used in an anhydrous environment.
Although the introduction of small molecule phosphoric acid compound can improve the conductivity, phosphoric acid is easy to lose during use

Method used

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  • High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof
  • High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof
  • High-electric conductivity aromatic polymer ionic liquid diaphragm material and preparation method thereof

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preparation example Construction

[0042] A preparation method of a highly conductive aromatic polymer ionic liquid diaphragm material of the present invention mainly includes the following steps: Step 1: Synthesizing an active intermediate containing a fluorine-containing sulfonic acid group or a fluorine-containing sulfonimide

[0043] Synthesis of active intermediates containing fluorine-containing sulfonic acid groups, whose molecular formula is XR f SO 3 M, where X is iodine or bromine, M is a metal element, R f Refer to -C n f 2n -or-[CF 2 CF 2 ] n OCF 2 CF 2 -, n is an integer from 1 to 40, including 1 and 40; or an active intermediate for synthesizing fluorine-containing sulfonimide, whose molecular formula is XR f SO 2 NMSO 2 R f ’, where X is iodine or bromine, M is a metal element, R f Refer to -C n f 2n -or-[CF 2 CF 2 ] n OCF 2 CF 2 -, R f ’ refers to ZC n f 2n -, Z is hydrogen, fluorine or chlorine, n is an integer from 1 to 40, including 1 and 40;

[0044] Step 2: Synthesis ...

Embodiment 1

[0062] Raw materials: iodine-terminated fluoroalkyl ether group sulfonyl fluoride (ICF 2 CF 2 OCF 2 CF 2 SO 2 F) with polysulfone

[0063] Step 1: Synthesis of ICF 2 CF 2 OCF 2 CF 2 SO 3 K

[0064] In a 300ml beaker, 100mMol ICF 2 CF 2 OCF 2 CF 2 SO 2 F was slowly added to a solution containing 220mMolKOH, 30ml water and 10ml ethanol, stirred for 0.5 hours, then added 30ml ethyl acetate and 10ml water to completely dissolve the resulting yellow solid, separated the organic layer, and continued to use 20ml ethyl acetate after the aqueous layer After extraction, all organic solutions were combined, then evaporated to remove the solvent, and dried under vacuum at 70 °C for 8 hours to obtain ICF as a yellowish solid 2 CF 2 OCF 2 CF 2 SO 3 K.

[0065] Step 2: Synthesis of PSU-CF 2 CF 2 OCF 2 CF 2 SO 3 h

[0066] At room temperature, drop an appropriate amount of liquid bromine into a dichloromethane solution containing polysulfone and stir to generate brom...

Embodiment 2

[0074] Raw material is identical with embodiment 1, is the fluoroalkyl ether group sulfonyl fluoride (ICF of iodine terminal group) 2 CF 2 OCF 2 CF 2 SO 2 F) with polysulfone.

[0075] Step 1: Synthesis of ICF 2 CF 2 OCF 2 CF 2 SO 2 NMSO 2 CF 3

[0076] Add 12.2mMol dry KF and 2.57mMolCF to the 25ml flask 3 SO 2 NHNa, evacuate to 2 mHg at 100 °C, then add 1.27 g of ICF 2 CF 2 OCF 2 CF 2 SO 3 F and 5ml of dry acetonitrile, remove volatile substances in the mixture at -196°C, keep the temperature at 60-80°C, stir and react for two days, then distill off the solvent under reduced pressure, and dry in vacuo to obtain 2.36 grams of solid product ICF 2 CF 2 OCF 2 CF 2 SO 2 N(K)SO 2 CF 3 .

[0077] Step 2: Synthesis of PSU-CF 2 CF 2 OCF 2 CF 2 SO 2 N(K)SO 2 CF 3

[0078] At room temperature, drop an appropriate amount of liquid bromine into the dichloromethane solution containing polysulfone and stir to generate brominated polysulfone P(SU-mBr); add 3...

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Abstract

The invention discloses a high-electric conductivity aromatic polymer ionic liquid diaphragm material and a preparation method thereof. The high-conductivity aromatic polymer ionic liquid diaphragm material comprises an cation and an anion, wherein the cation is a composite cation formed by combining at least one ion of hydrogen ions or metal ions with organic molecules; and the anion is a fluorine-contained sulfonic acid anion or a fluorine-contained sulfimide anion which is connected to an aromatic benzene ring-contained polymer side chain. Compared with the prior art, the polymer ionic liquid diaphragm material of the invention has the advantages of difficult loss of ionic liquid, electric conductivity without depending on water, penetration resistance of OH-anion, methanol or vanadium ions, and the like, can form a stable ion channel which has high ionic activity, high chemical stability, low ion activating energy and easy adsorption of organic polar solvents and is an ideal diaphragm material which can be applied to various fields of lithium ion batteries, secondary lithium ion batteries, methanol fuel batteries, liquid flow batteries, electrodialysis water treatment, atomic energy industry and analysis, catalytic synthesis, chlor-alkali industry, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a highly conductive fluorine-containing polyionic liquid diaphragm material and a preparation method thereof, which can be applied to lithium ion batteries, secondary lithium ion batteries, methanol fuel cells, liquid flow batteries, electric batteries, etc. Dialysis water treatment and chlor-alkali industry and other fields. Background technique [0002] Since entering the 21st century, energy issues have increasingly become the core issue restricting the sustainable development of mankind. In order to solve the energy crisis and achieve rapid economic growth and sustainable social development, new energy and new green environmental protection materials have gradually attracted the attention of governments of various countries, and thus received strong support and development. The battery industry, especially the battery industry represented by lithium-ion batteries i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/20C08G75/23C08G65/48C08G75/02C08G69/48C08G73/10C08J5/22H01M2/16C25B1/46C25B13/08B01D71/68H01M50/414
CPCY02E60/10
Inventor 薛立新陶慷严庆方省众
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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