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Application of a Porous Separator in Organic Flow Batteries

A technology of flow battery and organic system, applied in the direction of fuel cell, circuit, electrical components, etc., can solve the problems affecting the application of organic flow battery system, poor dimensional stability, high swelling rate, etc., to improve cycle performance and charge-discharge Efficiency, reduction in swelling ratio, effect of improving dimensional stability

Active Publication Date: 2019-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such asymmetric porous membranes tend to have a high swelling rate in organic solvent systems and show poor dimensional stability, which affects their application in organic flow battery systems.

Method used

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  • Application of a Porous Separator in Organic Flow Batteries
  • Application of a Porous Separator in Organic Flow Batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The prepared porous base membrane was placed in p-xylylenediamine solution at 10° C. for 1 h. The cross-linked porous membrane is rinsed with methanol several times, dried in a vacuum oven at 50°C, and assembled in an organic system lithium-bromine flow battery (the organic solvent in the electrolyte is 1,3-dioxolane), a lithium-bromine flow battery at 1.0mAcm -2 Charge and discharge under constant current conditions. And the cross-linked porous membrane was placed at 25-100° C. to program the temperature for thermal stability test.

Embodiment 2

[0029] The prepared porous base membrane was placed in p-xylylenediamine solution at 25° C. for 1 h. The cross-linked porous membrane was rinsed with methanol several times, dried in a vacuum oven at 50°C, and assembled in an organic system lithium-bromine flow battery. The lithium-bromine flow battery operated at 1.0 mAcm -2 Charge and discharge under constant current conditions. And the cross-linked porous membrane was placed at 25-100° C. to program the temperature for thermal stability test.

Embodiment 3

[0031] The prepared porous base membrane was placed in p-xylylenediamine solution at 40° C. for 1 h. The cross-linked porous membrane was rinsed with methanol several times, dried in a vacuum oven at 50°C, and assembled in an organic system lithium-bromine flow battery. The lithium-bromine flow battery operated at 1.0 mAcm -2 Charge and discharge under constant current conditions. And the cross-linked porous membrane was placed at 25-100° C. to program the temperature for thermal stability test.

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Abstract

The invention relates to the application of a porous diaphragm in an organic system liquid flow battery, which is linear or slightly branched (branched C 5 The asymmetric porous ion-conducting membrane is prepared by the solvent phase inversion method using the high molecular polymer resin as the raw material, and then introduces crosslinking points on the porous membrane matrix by the temperature-controlled crosslinking method. The asymmetric porous ion-conducting membrane with a three-dimensional network cross-linked structure is prepared through the combination of cross-linked points. The porous ion-conducting membrane with a cross-linked structure proposed in this patent has excellent dimensional stability in the electrolyte of an organic system, good thermal and mechanical stability, cheap and easy raw materials, and a simple membrane-making process that has large-scale application prospects. Therefore, the membrane is suitable for organic flow batteries and exhibits good battery performance.

Description

technical field [0001] The invention relates to a novel asymmetric cross-linked porous diaphragm and a preparation method thereof, in particular to its application in the field of organic system liquid flow batteries. Background technique [0002] The problem of environmental pollution and the increasing shortage of fossil energy have prompted the widespread attention of renewable energy from all over the world. Renewable energy such as wind energy and solar energy is affected by day and night, seasons and regions, so the power generated is discontinuous, unstable, and the rate of wind and light abandonment is high. Therefore, energy storage technology is a key technology to realize the popularization of renewable energy power and ensure the quality of grid power. Among many energy storage technologies, flow battery technology is suitable for large-scale energy storage due to its unique advantages. Compared with aqueous flow batteries, organic flow batteries have recently ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0239
CPCH01M8/0239Y02E60/50
Inventor 张华民席晓丽赖勤志李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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