Modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for vanadium redox battery and preparation method of modified PES-PVP hybrid anion exchange membrane

A technology of anion exchange membrane and vanadium battery, which is applied in the field of electrochemical materials, can solve the problems of high price, affecting battery efficiency, and poor barrier property of vanadium ions, and achieve the effects of high non-volatility, high energy efficiency, and long service life

Active Publication Date: 2016-07-20
工业和信息化部电子第五研究所华东分所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although the Nafion film used in commercial vanadium batteries has good chemical stability and low surface resistance, it is expensive, and has poor barrier properties to vanadium ions, and the battery self-discharge phenomenon is serious, which affects battery efficiency.

Method used

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  • Modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for vanadium redox battery and preparation method of modified PES-PVP hybrid anion exchange membrane
  • Modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for vanadium redox battery and preparation method of modified PES-PVP hybrid anion exchange membrane
  • Modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for vanadium redox battery and preparation method of modified PES-PVP hybrid anion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Dissolve 1 g of PES in 10 ml of concentrated sulfuric acid, add 8 ml of chloromethyl methyl ether, and react for 5 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The obtained chloromethylated PES was soaked in trimethylamine for 24 hours, washed with deionized water to neutrality, and dried to obtain quaternary ammonium base quaternized PES;

[0033] 2) Dissolve 1 g of PES in 10 ml of concentrated sulfuric acid, add 8 ml of chloromethyl methyl ether, and react for 5 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The obtained chloromethylated PES was soaked in 1-methylimidazole for 24 hours, washed with deionized water until neutral, and dried to obtain imidazole quaternized PES;

[0034] 3) After blending the quaternized modified PES with the quaternary ammonium base and the quaternized modified PES with the PVP according to the ...

Embodiment 2

[0037] 1) Dissolve 2g of PES in 20ml of concentrated sulfuric acid, add 10ml of chloromethyl ether, and react for 7 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The chloromethylated PES was soaked in triethylamine for 36 hours, washed with deionized water until neutral, and dried to obtain quaternary ammonium base quaternized PES;

[0038] 2) Dissolve 2g of PES in 20ml of concentrated sulfuric acid, add 10ml of chloromethyl ether, and react for 7 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The chloromethylated PES was soaked in 1-methylimidazole for 36 hours, washed with deionized water until neutral, and dried to obtain imidazole quaternized PES;

[0039] 3) After blending the quaternized modified PES with the quaternary ammonium base and the quaternized modified PES with the PVP according to the mass ratio of 1:3, the quaternized mo...

Embodiment 3

[0042] 1) Dissolve 3g of PES in 30ml of concentrated sulfuric acid, add 12ml of chloromethyl butyl ether, and react for 8 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The obtained chloromethylated PES was soaked in triethylamine for 48 hours, washed with deionized water until neutral, and dried to obtain quaternary ammonium base quaternized PES;

[0043] 2) Dissolve 3g of PES in 30ml of concentrated sulfuric acid, add 12ml of chloromethyl butyl ether, and react for 8 hours to precipitate a white solid, wash with deionized water until neutral, and dry to obtain chloromethylated PES; The obtained chloromethylated PES was soaked in 1-methylimidazole for 48 hours, washed with deionized water until neutral, and dried to obtain imidazole quaternized PES;

[0044] 3) After blending the quaternized modified PES with the quaternary ammonium base and the quaternized modified PES with the PVP according to the mass ra...

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Abstract

The invention discloses a modified PES (polyether sulfones)-PVP (polyvinylpyrrolidone) hybrid anion exchange membrane for a vanadium redox battery. The modified PES-PVP hybrid anion exchange membrane for the vanadium redox battery is prepared by blending of quaternization modified PES and PVP, wherein the quaternization modified PES is a mixture of quaternary ammonium base type quaternization modified PES and imidazole type quaternization modified PES. By blending of the quaternary ammonium base type quaternization modified PES, the imidazole type quaternization modified PES and the PVP, superior properties of the three are combined. In application to all-vanadium redox flow batteries, the modified PES-PVP hybrid anion exchange membrane has excellent vanadium resistance and ion selection performances and has advantages of high stability, superior mechanical properties, high coulombic efficiency and long service life.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, in particular to a modified PES-PVP blended anion exchange membrane for vanadium batteries and a preparation method thereof. Background technique [0002] The vanadium battery is called the full vanadium redox flow battery (Vanadium Redox Battery, abbreviated as VRB), which is a redox battery in which the active material is in a circulating liquid state. It uses the redox reaction between vanadium ions in different valence states to realize energy Conversion, the active substance participating in the reaction is liquid vanadium ions, and the vanadium battery is a liquid flow energy storage battery with high efficiency, environmental protection, large capacity, high current charge and discharge, and deep discharge. [0003] Vanadium battery is mainly composed of electrode material, electrolyte and ion exchange membrane. Among them, the ion exchange membrane is one of the core components o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M50/409
CPCH01M8/02H01M50/409Y02E60/50Y02E60/10
Inventor 张琦练健
Owner 工业和信息化部电子第五研究所华东分所
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