Abstract: A novel fluorinated poly（aryl ether oxadiazole）s ionomer with quaternary imidazole groups were synthesized via copolymerization of 3，3′，5，5′-tetramethy biphenyl diphenol（TM-BP），2，5-bis（2，3，4，5，6-pentafluorophenyl）-1，3，4-oxadiazole（FPOx）and 6F-BPA，bromination of the benzylic methyl，and functionalization with N -methylimidazole. The anion exchange membranes（QFOAEMs）were obtained by solution casting method. The ion exchange capacity（IEC），conductivity，water uptake and swelling ratio of the QFOAEMs were studied. The results showed that the permeability of vanadium ion of QFOAEMs was 1.1×10^-8cm²·min^-1，much less than that of Nafion117 membrane（3.8×10^-7cm²·min^-1）. The QFOAEMs membrane has a potential application for vanadium redox flow battery.

Key words: vanadium redox flow battery, anion exchange membranes, fluorinated poly（aryl ether oxadiazole）s

摘要： 离子交换膜的钒离子渗透是制约全钒液流电池效率的因素之一。制备了一种新型的、低钒离子渗透的氟化聚芳醚阴离子交换膜。以六氟双酚A、四甲基联苯二酚、含氟单体合成了多氟聚噁二唑芳醚。以N-溴代丁二酰亚胺（NBS）为溴化试剂，过氧化二苯甲酰（BPO）为引发剂，将多氟聚噁二唑芳醚上的甲基进行溴化、功能化得到多氟聚噁二唑芳醚阴离子交换膜（QFOAEM）。研究了该膜的钒离子渗透率、离子传导率、吸水率、溶胀度和离子交换容量（IEC）等性能。研究结果表明：QFOAEM的钒离子渗透率为1.1×10^-8cm²·min^-1，低于Nafion117的3.8×10^-7cm²·min^-1，具有在全钒液流电池中应用的潜力。

关键词: 全钒液流电池, 阴离子交换膜, 多氟聚噁二唑芳醚