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A kind of modified pes-pvp blended anion exchange membrane for vanadium battery and preparation method thereof

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

Active Publication Date: 2018-09-11
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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  • A kind of modified pes-pvp blended anion exchange membrane for vanadium battery and preparation method thereof
  • A kind of modified pes-pvp blended anion exchange membrane for vanadium battery and preparation method thereof
  • A kind of modified pes-pvp blended anion exchange membrane for vanadium battery and preparation method thereof

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-PVP blended anion exchange membrane for vanadium batteries. A modified PES-PVP blended anion exchange membrane for vanadium batteries of the present invention is prepared by blending quaternized modified PES and PVP, and the quaternized modified PES is quaternized with a quaternary ammonium base A mixture of modified PES and imidazole quaternized modified PES; after blending the quaternary ammonium base quaternized modified PES anion exchange membrane, imidazole quaternized modified PES anion exchange membrane and PVP, the combination of the three excellent performance. The modified PES-PVP blended anion exchange membrane prepared by the present invention has good vanadium resistance performance, ion selection performance, excellent stability and mechanical performance, and high coulombic efficiency when applied to an all-vanadium redox flow battery ,long lasting.

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 full name of the vanadium battery is the vanadium redox flow battery (Vanadium Redox Battery, abbreviated as VRB). For energy conversion, the active substance participating in the reaction is liquid vanadium ions. 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 of the vanadium battery. How to obtain a separator with high selectivity, low resistance and sufficient chemical stability is a key factor restricting the performance of th...

Claims

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Application Information

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Patent Type & Authority Patents(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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