Method for screening solvent treatment process parameters of polymer porous ion conduction membrane for flow battery

An ion-conducting membrane and treatment process technology, which is used in the field of screening parameters of the solvent treatment process of polymer porous ion-conducting membranes, can solve problems such as high cost and complicated procedures, and achieve optimized performance, high ion selectivity, and excellent proton conductivity. Effect

Active Publication Date: 2020-03-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a specific polymer membrane material, the choice of which solvent-treated membrane has the best effect in a flow battery requires a large number of experiments and performance comparisons only through experimental exploration, the procedure is complicated, and the cost is high.

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
  • Method for screening solvent treatment process parameters of polymer porous ion conduction membrane for flow battery
  • Method for screening solvent treatment process parameters of polymer porous ion conduction membrane for flow battery
  • Method for screening solvent treatment process parameters of polymer porous ion conduction membrane for flow battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Porous ion-conducting membranes were prepared using polybenzimidazole as the membrane material, and isopropanol, acetone, and ethyl acetate were used as optional processing solvents. Firstly, obtain the Hansen solubility parameters of polymers and solvents through literature review or equation calculation. Then, the interaction parameter χ between the polymer and the solvent was calculated, and the above-mentioned candidate solvents were initially screened.

[0065] The screening process is as follows:

[0066] When using isopropanol as a processing solvent, according to the literature review, it can be known that the δ of isopropanol IPA =23.5MPa 1 / 2 , V m =76.8L mol -1 .

[0067] According to literature review PBI's F i , n i , S j and m j As shown in Table 1:

[0068] Table 1

[0069]

[0070] through the equation Calculate δ PBI =23.29MPa 1 / 2 .

[0071] Take R=8.314J mol -1 K -1 , T=298K, through the equation Calculated χ PBI-IPA =0.382<2...

Embodiment 2

[0094] Porous PBI membranes were prepared with polybenzimidazole (PBI) as the membrane material, and isopropanol and isopropanol aqueous solution were selected as alternate solvents. Firstly, obtain the Hansen solubility parameters of polymers and solvents through literature review or equation calculation. Then, the interaction parameter χ between the polymer and the solvent was calculated, and the above-mentioned candidate solvents were initially screened.

[0095] The screening process is as follows:

[0096] According to literature review, it can be known that the δ of sleep Water =47.9MPa 1 / 2 , V m =18L mol -1 .

[0097] From the above calculations, it can be seen that δ PBI =23.29MPa 1 / 2 . Take R=8.314J mol -1 K -1 , T=298K, through the formula Calculated χ PBI-Water =4.261.

[0098] When isopropanol: water=9:1, by the equation χ=∑X i Y j x i-j =0.9×0.382+0.1×4.261 It can be seen that the χ=0.7699<2.5 between PBI and the treatment solvent meets the requir...

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
Lengthaaaaaaaaaa
Effective areaaaaaaaaaaa
Current densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for screening solvent treatment process parameters of a polymer porous ion conduction membrane for a flow battery. The method comprises: characterizing the interaction strength between a polymer and a solvent by utilizing polymer-solvent interaction parameters; predicting the film forming mechanism of the polymer porous ion conducting film by judging the strengthof the interaction of different polymers and solvents; screening out proper solvent treatment process parameters by combining calculation of the relative swelling rate and shrinkage rate of the polymer porous ion conduction membrane. The polymer porous ion conduction membrane is prepared from one or more than two of polar group-containing organic polymer resins as raw materials. By adopting the screened solvent treatment process parameters, the treated polymer porous ion conduction membrane has more compact morphology and higher pore connectivity, so that the assembled all-vanadium redox flowbattery has higher battery efficiency and longer cycle life.

Description

technical field [0001] The invention relates to a method for screening parameters of a solvent treatment process of a polymer porous ion conduction membrane used in a liquid flow battery. Background technique [0002] Liquid flow battery is a new electrochemical energy storage technology. Compared with other energy storage technologies, it has the advantages of flexible system design, large storage capacity, free site selection, high energy conversion efficiency, deep discharge, safety and environmental protection, power and capacity. With the advantages of independent design and low maintenance cost, it can be widely used in wind energy, solar energy and other renewable energy generation and energy storage, emergency power system, backup power station and power system peak shaving and valley filling. Vanadium flow battery (Vanadium flow battery, VFB) is considered to have a good application prospect due to its advantages of high safety, good stability, high efficiency, long...

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
IPC IPC(8): G01N33/00G01N15/08G06F30/20
CPCG01N33/00G01N15/08G01N2015/086
Inventor 李先锋鲁文静张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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