Fluorine/hydrocarbon composite ion exchange film and preparation thereof

A technology of ion exchange membranes and composite ions, which is applied in the field of fluorine/hydrocarbon composite ion exchange membranes and its preparation, can solve the problems of poor binding, increased resistance and delamination of fluorine/hydrocarbon composite ion exchange membranes, and achieve good performance , promote commercial promotion, and improve the effect of combining performance

Inactive Publication Date: 2009-03-11
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

The above-prepared fluorine/hydrocarbon composite ion exchange membrane has poor bonding due to the lack of chemical bond cross-linking between the two layers o

Method used

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  • Fluorine/hydrocarbon composite ion exchange film and preparation thereof
  • Fluorine/hydrocarbon composite ion exchange film and preparation thereof
  • Fluorine/hydrocarbon composite ion exchange film and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Dissolve 0.8g of sulfonated polysulfone in 95g of dimethyl sulfoxide (DMSo) to form casting solution A, pour the casting solution on a glass plate, and evaporate the solvent at 120°C for 24 hours to obtain sulfonated polysulfone ion exchange membrane;

[0037] Dissolve 0.4g of dry Nafion resin in 95g of dimethyl sulfoxide (DMSo) to form casting solution B, add 0.5g of ethylenediamine, stir evenly, and pour it on the surface of sulfonated polysulfone ion exchange membrane, at 100°C The solvent was evaporated for 24h to form a composite ion exchange membrane.

[0038] The vanadium redox flow battery (VRB) using the composite film as a diaphragm has no obvious decay in battery efficiency within 200 hours, and the total energy efficiency remains above 80%. image 3 shown. The operating conditions of the battery are: the active material in the positive and negative electrolytes is 1.5M V(IV) / V(V) and 1.5M V(II) / V(III), and the supporting electrolyte is 3M H2 SO 4 , the el...

Embodiment 2

[0040] In the same manner as in Example 1, the difference is that the hydrocarbon polymer used is sulfonated polyethersulfone.

Embodiment 3

[0042] In the same manner as in Example 1, the difference is that the hydrocarbon polymer used is sulfonated polyphenylene ether.

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Abstract

The invention relates to a fluorine/hydrocarbon composite ion exchange membrane and a preparation method thereof. The membrane is formed by compounding a layer of hydrocarbon sulfonic acid type ion exchange membrane and a layer of perfluorinated sulfonic acid type ion exchange membrane; compared with the perfluorinated sulfonic acid type ion exchange membrane, the composite ion exchange membrane has low price, and compared with the hydrocarbon sulfonic acid type ion exchange membrane, the chemical stability of the composite ion exchange membrane is remarkably improved. The preparation method of the membrane is as follow: the sulfonic acid radical of the hydrocarbon sulfonic acid type ion exchange membrane is cross-linked with the sulfonic acid group of the perfluorinated sulfonic acid type ion exchange membrane through chemical cross-linking reaction, and thereby the composite ion exchange membrane is obtained. The membrane is used as the battery diaphragm of the all-vanadium redox flow battery (VRB), and can effectively reduce the cost of the battery on the basis of keeping good oxidation resistance.

Description

technical field [0001] The invention relates to an ion exchange membrane for a vanadium redox flow battery (VRB), in particular to a fluorine / hydrocarbon composite ion exchange membrane and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution are two major problems facing sustainable development. The very important way to solve these two problems is to carry out energy saving and consumption reduction and strengthen the development and utilization of renewable energy such as water energy, wind energy, solar energy, tidal energy and nuclear energy. In order to ensure the stable power supply of solar energy, wind energy and other renewable energy power generation systems, it is necessary to develop efficient, cheap, low-pollution, safe and reliable energy storage technology; the peak-shaving and valley-filling and load balancing of the power grid also urgently require the development of large-scale energy storage technology. Am...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M8/02C08J5/22B01D69/12B01D71/00H01M8/1053H01M8/1072
CPCY02E60/50
Inventor 张华民罗庆涛陈剑刘宗浩
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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