Sulfonated fluorene-containing polyether sulphone for proton exchange membrane of all-vanadium flow battery and preparation method and application thereof

An all-vanadium redox flow battery and proton exchange membrane technology, which is applied to fuel cell parts, battery pack parts, circuits, etc., can solve problems such as uncharacterized chemical stability, high vanadium ion permeability, and battery performance degradation , achieving high Coulombic efficiency and energy conversion efficiency, avoiding interaction, and low cost

Inactive Publication Date: 2010-01-20
SUN YAT SEN UNIV
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high vanadium ion permeability and high cost of the Nafion membrane, it is not suitable for application in all-vanadium redox flow batteries.
Qiu Xinping of Tsinghua University [Journal of Material Chemistry, 18 (1232) 2008] used Nafion film as a substrate to prepare a multi-layer film for all-vanadium redox flow battery by self-assembly method, but there are problems of high production cost and complicated process. features
M. Skyllas-Kazacos et al [Journal of Membrane Science, 107 (35) 1995] modified the low-cost commercial membrane Daramic by cross-linking and sulfonation as the proton exchange membrane of the all-vanadium redox flow battery, but its chemical stability is not as good as uncharacterized
Theresa Sukkar et al [Journal of Applied Electrochemistry, 34 (137) 2004] to the Gore Select L-570 of U.S. Gore Tex company, L-01009, L-01854 and L-03430 etc. membranes are used in all-vanadium redox flow battery anolyte The stability of these films has been studied, showing that the durability of these films is not good, and long-term use will lead to a decline in battery performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sulfonated fluorene-containing polyether sulphone for proton exchange membrane of all-vanadium flow battery and preparation method and application thereof
  • Sulfonated fluorene-containing polyether sulphone for proton exchange membrane of all-vanadium flow battery and preparation method and application thereof
  • Sulfonated fluorene-containing polyether sulphone for proton exchange membrane of all-vanadium flow battery and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of sulfonated fluorene-containing polyaryl ether sulfone:

[0040] At room temperature, add 0.5mmol of fluorene polyarylether sulfone 1aa into a 150mL single-necked flask, add 50mL of dichloromethane, and magnetically stir to dissolve it. Weigh 0.133mL (2mmol, 0.234g) of chlorosulfonic acid with a molar ratio of 1:6 (raw material ratio) to the chlorosulfonic acid molecule, add 10mL of dichloromethane to prepare a solution, and slowly add it dropwise with a constant pressure dropping funnel , react at room temperature for 6 hours, a brown precipitate is formed, pour out dichloromethane, wash the product 3 times with 10mL of cyclohexane, add 10mL of DMAc, stir for 1-2 hours to fully dissolve, add 20mL of 3wt% sodium hydroxide solution, Stir for 6 hours, add 100 mL of 5vol% hydrochloric acid solution, stir for 6 hours, transfer the product into a dialysis bag for dialysis until the water outside the bag is neutral, and then evaporate to dryness to obtain the su...

Embodiment 2～8

[0042] The sulfonation steps of embodiments 2, 3, 4, 5, 6, 7 and 8 are all the same as in embodiment 1, except that the raw material ratio or the chemical structure containing fluorene polyarylether sulfone, the sulfonation degree (y value) are different, as shown in Table 1:

[0043] Table 1 Results after sulfonation of fluorene-containing polyaryl ether sulfones with different molecular structures

[0044] Example

Embodiment 9

[0045] Embodiment 9 prepares single-component film

[0046] Take 1g of the sulfonated fluorene-containing polyarylether sulfone 2aa prepared in Example 1, add 20mL of DMAc, heat and stir to dissolve, filter, concentrate the filtrate to 10mL, cast it on a glass plate placed horizontally, and place it in a dust-free environment Dry at 80°C to obtain a single-component film 2-1.

[0047] The prepared film was Fenton's reagent (3wt.%H 2 o 2 +2ppm FeSO 4 ) to measure its anti-oxidation stability, and measure the time when the membrane begins to decompose into flocculent precipitates in a water bath shaker at 80°C.

[0048] The prepared membrane was acidified with 1M sulfuric acid at 80° C. for 24 hours, and then soaked in ultrapure water for 24 hours to wash away excess acid adsorbed in the membrane. The conductivity at room temperature was measured with an AC impedance meter.

[0049] The prepared film was VO 2+ The permeability is used to characterize the anti-vanadium ion ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses sulfonated fluorene-containing polyether sulphone for a proton exchange membrane of an all-vanadium flow battery and a preparation method and an application thereof. The preparation method of the invention adopts fluorene-containing bisphenol with different structures and different dihalide monomers to perform copolymerization in non-proton polar solvent under the action of potassium carbonate catalyst, then uses chlorosulfonic acid to sulfonate the obtained polymer and finally adjusts the dosage of chlorosulfonic acid to prepare a kind of sulfonated fluorene-containing polyether sulphones with different degrees of sulfonation. The polymer can be directly casted to prepare single component film, mixed with other polymers to prepare composite film, mixed with inorganic matter to prepare doped film or combined with other ion exchange films to prepare multi-layer film. The films are characterized by low vanadium ion permeability, low water absorption, high proton conductivity, good stability, low cost and the like, thus being applicable to being used as proton exchange films of the all-vanadium flow battery.

Description

technical field [0001] The invention relates to a sulfonated fluorene-containing polyaryl ether sulfone used for a proton exchange membrane of an all-vanadium redox flow battery, a preparation method and application thereof, and belongs to the technical field of proton-exchange membrane materials of an all-vanadium redox flow battery. Background technique [0002] The all-vanadium redox flow battery is a new type of high-efficiency electrochemical energy storage system. It provides the main power supply electromotive force through the oxidation-reduction reaction between four vanadium ions in different valence states. The two sides of the ion exchange membrane circulate respectively, and the current loop is completed by ion conduction. It has the following advantages: 1. There is no concentration polarization, deep discharge and instantaneous charge; 2. Because the positive and negative electrolytes are vanadium ion electrolytes, there is no cross-contamination problem; 3. R...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23B29C41/24H01M2/16H01M8/02H01M8/0202
CPCY02E60/12Y02E60/50
Inventor 孟跃中陈栋阳王拴紧肖敏韩东梅
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap