EA sandwiched bipolar membrane for all vanadium redox flow battery with high coulombic efficiency
EA sandwiched bipolar membrane for all vanadium redox flow battery with high coulombic efficiency
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一种高库伦效率全钒氧化还原液流电池夹层双极膜
DOI：
10.1016/j.polymer.2018.02.051
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发表时间：
2018-03-28
期刊：
影响因子：
4.6
通讯作者：
Teng, Xiangguo
中科院分区：
文献类型：
--
作者：
Dai, Jicui;Dong, Yichao;Teng, Xiangguo
由于低钒渗透性和高质子传导性之间的良好平衡，AIEM（两性离子交换膜）在全钒氧化还原液流电池（VRB）应用中吸引了广泛的考虑。与AIEM类似，BPM（双极膜）在阴离子选择层和阳离子选择层中也具有阴离子和阳离子交换基团。本文制备了一系列以聚四氟乙烯（PTFE）增强的QAPSF（季铵化聚砜）和SPEEK（磺化聚醚醚酮）为基料的VRB用BPM。结果表明，所制备的膜均呈现出典型的三明治结构，中间层明显。由于QAPSF中阴离子基团的“Donnan排斥效应”，所有的BPM都显示出非常低的VO 2+渗透性。特别是，具有Q/P/S-3：2膜的电池在40-80 mA cm（-2）的电流密度下显示出平均库伦效率为98.9%。该膜具有操作简单、阳离子和阴离子选择范围广等优点，经进一步研究，有望成为VRB应用的理想膜材料。(C)2018爱思唯尔有限公司版权所有。
Due to the good balance between the low vanadium permeability and high proton conductivity, AIEM (amphoteric ion exchange membrane) has attracted vast consideration for all vanadium redox flow battery (VRB) application. Similar to the AIEM, BPMs (bipolar membranes) also have both anion and cation exchange groups in the anion-selective layer and cation-selective layer. In this paper, a series of BPMs based on PTFE (polytetrafluoroethylene) reinforced QAPSF (quaternized polysulfone) and SPEEK (sulfonated poly ether ether ketone) are prepared and investigated for the VRB application. As expected, all the membranes have presented typical sandwiched structure with an obvious intermediate layer observed by SEM. Owing to the "Donnan exclusion effect" of anion groups in QAPSF, all the BPMs have shown very low VO2+ permeability. Particularly, the battery with Q/P/S-3:2 membrane has shown average coulombic efficiency of 98.9% at current density of 40-80 mA cm(-2). Considering the simple adjustment and abundant choice of cation or anion resins, BPMs membranes should be a promising candidate for VRB application after further investigation. (C) 2018 Elsevier Ltd. All rights reserved.