A kind of preparation method and application of sulfonated polyaryletherketone ion exchange membrane

A technology of sulfonated polyaryletherketone and ion-exchange membrane, which is applied in the field of ion-exchange membrane materials, can solve the problems of complex preparation process, lower battery capacity, and high price, and achieve simple preparation process, high proton conductivity, and low cost Effect

Active Publication Date: 2020-05-26
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nafion series membranes have excellent ionic conductivity and excellent electrochemical stability, but the membrane preparation process is complex and expensive
It is directly applied to the all-vanadium redox flow battery, because the reverse micelles formed by the sulfonic acid groups of Nafion in the electrolyte are more conducive to the shuttle of vanadium ions, which leads to the self-discharge of the battery and reduces the battery capacity

Method used

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  • A kind of preparation method and application of sulfonated polyaryletherketone ion exchange membrane
  • A kind of preparation method and application of sulfonated polyaryletherketone ion exchange membrane
  • A kind of preparation method and application of sulfonated polyaryletherketone ion exchange membrane

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Embodiment 1

[0035] A kind of preparation method of sulfonated polyaryletherketone ion exchange membrane is provided in this instance, and its concrete steps are:

[0036] 1) Sulfonated 4,4'-difluorobenzophenone: Add 5g of 4,4'-difluorobenzophenone into a 250ml two-necked round bottom flask with a reflux condenser, and then add 20ml of analytically pure Grade oleum with a concentration of 20%, magnetic stirring and heating to 110°C for reaction; after the reaction, cool to room temperature, slowly pour the product into 100ml of ice-water mixture, stir and add 25g of sodium chloride, until white Suction filter and dry the solid after the solid precipitates; dissolve the dried solid in 20-40ml of deionized water, slowly add sodium hydroxide, adjust the solution to neutral, then add sodium chloride to form a supersaturated solution, and a white solid precipitates , suction filtration, and drying; then the dried solid was heated and dissolved with dimethyl sulfoxide, the insoluble impurities w...

Embodiment 2

[0041] A kind of preparation method of sulfonated polyaryletherketone ion exchange membrane is provided in this instance, and its concrete steps are:

[0042] 1) Sulfonated 4,4'-difluorobenzophenone: Add 5g of 4,4'-difluorobenzophenone into a 250ml two-necked round bottom flask with a reflux condenser, and then add 20ml of analytically pure Grade oleum with a concentration of 20%, magnetic stirring and heating to 110°C for reaction; after the reaction, cool to room temperature, slowly pour the product into 100ml of ice-water mixture, stir and add 25g of sodium chloride, until white Suction filter and dry the solid after the solid precipitates; dissolve the dried solid in 20-40ml of deionized water, slowly add sodium hydroxide, adjust the solution to neutral, then add sodium chloride to form a supersaturated solution, and a white solid precipitates , suction filtration, and drying; then the dried solid was heated and dissolved with dimethyl sulfoxide, the insoluble impurities w...

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Abstract

The invention discloses a sulfonated polyaryl ether ketone (SFPAEK) ion exchange membrane preparation method and application thereof in an all-vanadium redox flow battery, and relates to the field of ion exchange membrane materials. An SFPAEK ion exchange membrane can be prepared from a sulfonic acid polymer and a reinforcing material in a blending and compounding manner; in a membrane preparation process through the processes, such as a flow casting wet method, a hot-pressing dry method, an extrusion dry method, an extrusion and blow moulding dry method and a membrane stretching orientation method, inorganic nanosheets are uniformly dispersed in the basal body of cation exchange resin; a vanadium ion barrier layer is formed; the vanadium ion shuttle effect accompanying in the charging and discharging process of the all-vanadium redox flow battery can be effectively inhibited; the method is simple in process, green, environment-friendly and low in cost; in the implementation process, damage on the membrane itself does not exist; the formed membrane has better mechanical strength; and both the electrical conductivity and the swelling degree of the membrane are ensured.

Description

technical field [0001] The invention relates to the field of ion-exchange membrane materials for liquid flow energy storage battery separation membranes and fuel cells, in particular to a preparation method and application of a sulfonated polyaryletherketone (SFPAEK) ion-exchange membrane. Background technique [0002] All-vanadium redox flow battery (VRFB) realizes the mutual conversion of electrical energy and chemical energy through the electrochemical reaction of vanadium ions in different valence states. Due to its long life (>15 years), deep charging and discharging, high safety and stability (charging and discharging cycles>16,000 times), and high energy efficiency, it has become one of the most potential energy storage devices for large-scale energy storage. . [0003] In all-vanadium redox flow batteries, the most critical core material is the diaphragm in the stack. The diaphragm is an ion exchange membrane responsible for separating the positive and negativ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1018H01M8/1067H01M8/1069H01M8/18
CPCH01M8/1018H01M8/1067H01M8/1069H01M8/188Y02E60/50
Inventor 黄程刘俊凯黄维
Owner NANJING TECH UNIV
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