Preparation of sulfonated polyimide/polyvinyl alcohol composite membrane for vanadium redox flow battery applications

被引：0
|
作者：
Hailin Yu
Yifan Xia
Hanwen Zhang
Yinghan Wang
机构：
[1] Sichuan University,State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering
来源：
Polymer Bulletin | 2021年 / 78卷
关键词：
Sulfonated polyimide; Polyvinyl alcohol; High selectivity; Vanadium redox flow battery;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A novel series of sulfonated polyimide (SPI)/polyvinyl alcohol (PVA) composite membranes applied in vanadium redox flow battery (VRFB) is prepared and characterized in this work. With the hydrophilicity and good barrier of PVA, the composite membranes exhibit better hydrolysis stability and vanadium ion resistance than normal SPIs with five-membered rings. In VRFB single-cell tests, because of the highest proton selectivity, the SPI5/PVA5 composite membrane shows lower self-discharge rate, higher coulombic efficiency, and energy efficiency (EE) (79.5% vs 77.8% at 30 mA cm−2) than that of Nafion117. Besides, the composite membranes present stable performances up to 100 cycles without significant decline in EE.
引用
收藏
页码：4183 / 4204
页数：21
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