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Blending membrane for all-vanadium redox flow battery and preparation method for blending membrane

An all-vanadium redox flow battery and blended membrane technology, which can be applied to battery components, circuits, electrical components, etc., can solve the problems of limiting large-scale commercial batteries, poor dimensional stability, and high vanadium ion transmission rate. Problems, to achieve superior dimensional stability and wear resistance, improve dimensional stability and mechanical strength, high modulus effect

Active Publication Date: 2013-01-16
辽宁科京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a kind of all-vanadium redox flow battery and its preparation method. High efficiency, which limits the need for large-scale commercial batteries, prepared perfluorosulfonic acid ion exchange resin (PFSA) and sulfonated polybenzimidazole ( SPBI) blended ion exchange membrane, which can be applied to all-vanadium redox flow battery (VRB)

Method used

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  • Blending membrane for all-vanadium redox flow battery and preparation method for blending membrane
  • Blending membrane for all-vanadium redox flow battery and preparation method for blending membrane
  • Blending membrane for all-vanadium redox flow battery and preparation method for blending membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add 25g of polyphosphoric acid (PPA) to a 100m three-necked flask equipped with a stirrer and an air duct, under the protection of nitrogen, stir and deoxidize at a temperature of 140°C, then cool it down, and add 0.4g of dimethyl isophthalate Sodium ester-5-sulfonate (SIPN) and 1.0 g 3,3',4,4'-tetraaminobiphenyl (DAB) and 0.98 g bis(benzoic acid)hexafluoropropane (BIS-B-AF, ie 2 , 2-bis(4-carboxyphenyl)hexafluoropropane), stirred at 80°C for 7h, and heated at 180°C for 12h to obtain a brown viscous substance. After cooling, it was poured into water to obtain a strip polymer, which was then rinsed with deionized water and dried in vacuum to constant weight to obtain sulfonated polybenzimidazole (SPBI).

Embodiment 2

[0024] Preparation of Example 2 Sulfonated Polybenzimidazole (SPBI):

[0025] Add 25g of polyphosphoric acid (PPA) into a 100m three-necked flask equipped with a stirrer and an air duct, under the protection of nitrogen, stir and deoxidize at a temperature of 140°C, then cool it down, and add 0.52g of dimethyl isophthalate Sodium ester-5-sulfonate (SIPN) and 1.0 g 3,3',4,4'-tetraaminobiphenyl (DAB) and 0.86 g bis(benzoic acid)hexafluoropropane (BIS-B-AF), 80 The reaction was stirred at ℃ for 7 hours, and the temperature was raised to 180 ℃ for 12 hours to obtain a brown viscous substance. After cooling, it was poured into water to obtain a strip polymer, which was then rinsed with deionized water and dried in vacuum to constant weight to obtain sulfonated polybenzimidazole (SPBI).

Embodiment 3

[0026] Example 3 Preparation of sulfonated polybenzimidazole (SPBI):

[0027] Add 25g of polyphosphoric acid (PPA) into a 100m three-necked flask equipped with a stirrer and an air duct, under the protection of nitrogen, stir and deoxidize at a temperature of 140°C, then cool it, and add 0.45g of dimethyl isophthalate Sodium ester-5-sulfonate (SIPN) and 1.0 g 3,3',4,4'-tetraaminobiphenyl (DAB) and 0.83 g bis(benzoic acid)hexafluoropropane (BIS-B-AF), 80 The reaction was stirred at ℃ for 7 hours, and the temperature was raised to 180 ℃ for 12 hours to obtain a brown viscous substance. After cooling, it was poured into water to obtain a strip polymer, which was then rinsed with deionized water and dried in vacuum to constant weight to obtain sulfonated polybenzimidazole (SPBI).

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Abstract

The invention relates to the field of ion exchange membranes for all-vanadium redox flow batteries (VRB), in particular to a blending membrane for a VRB and a preparation method for the blending membrane. The blending membrane comprises A weight percent of perfluorosulfonate (PFSA) ion exchange resin and B weight percent of sulfonated polybenzimidezole (SPBI), wherein A is more than 75 percent and less than or equal to 100 percent, and B is more than 0 percent and less than or equal to 25 percent. The method comprises the following steps of: dissolving the PFSA ion exchange resin and the SPBI into a solvent respectively, mixing the PFSA ion exchange resin and the SPBI according to a certain proportion, magnetically stirring the mixed solution, performing ultrasonic treatment for a certain time to uniformly mix the PFSA ion exchange resin and the SPBI, spreading the uniform solution on a clean glass plate, preserving heat for a certain time at low temperature in a baking oven, raising the temperature, preserving heat for a certain time, and performing temperature reduction to obtain the blending membrane. The method is simple; and the prepared blending membrane is low in swelling, high in dimensional stability, strong in mechanical strength, low in vanadium ion permeability, high in chemical and thermal stability and applicable to the VRB.

Description

technical field [0001] The invention relates to the field of ion exchange membranes for all-vanadium redox flow batteries (VRB), in particular to a blended membrane for all-vanadium redox flow batteries and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the contradiction between energy, resources and environmental protection has become increasingly prominent, prompting the urgent transformation of the traditional energy system to renewable energy. [0003] Adjusting the current power energy structure and developing large-scale utilization of renewable clean energy such as wind energy and solar energy have become the basic national policies for the development of electric energy in my country. The power generation process of renewable energy such as wind energy and solar energy is discontinuous and unstable. It needs to be equipped with power storage devices to achieve continuous and stable power output, so as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/18
CPCY02E60/12Y02E60/10
Inventor 赵丽娜凌霄赵焕刘建国严川伟
Owner 辽宁科京新材料有限公司
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