Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers
Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers
复制标题
利用静电纺聚电解质纳米纤维实现阴离子交换膜低离子交换容量的高电导率
DOI：
10.1021/acsaem.0c01728
复制
发表时间：
2020-11-23
影响因子：
6.4
通讯作者：
Wei, Zidong
中科院分区：
文献类型：
--
作者：
Duan, Hanzhao;Cheng, Xia;Wei, Zidong
在阴离子交换膜中，离子交换容量（IEC）和机械性能之间存在“权衡”。在这项工作中，通过用静电纺聚电解质纳米纤维构建高效的离子通道，只需要少量的离子交换基团（意味着低IEC）就可以实现高离子电导率。在低IEC为1.02 mmol g（-1）的条件下，季铵化聚（2,6-二甲基-1,4-苯基氧化物）纳米纤维(QPPONF)/聚乙烯醇（QPPONF/PVA）复合膜在60℃时的电导率为51.5 mS cm(-1)，远高于均匀QPPO铸造膜在60℃时的电导率(20.3 mS cm（-1), IEC = 1.04 mmol g(-1)）。此外，70 wt % QPPONF/PVA复合膜在H-2/O-2燃料电池测试中表现出优异的峰值功率密度791 mW cm（-2）。
There has been a "trade-off" between ion exchange capacity (IEC) and mechanical properties in anion exchange membranes. Thinking out of the box, high ion conductivity was realized with only a small amount of ion exchange groups (means low IEC) in this work, by way of constructing highly effective ion channels with electrospun polyelectrolyte nanofibers. At a low IEC of 1.02 mmol g(-1), the conductivity of quaternized poly(2,6-dimethyl-1,4-phenylene oxide) nanofiber (QPPONF)/poly(vinyl alcohol) (QPPONF/PVA) composite membranes achieved was 51.5 mS cm(-1) at 60 degrees C, which was much higher than that of the homogenous QPPO casting membrane (20.3 mS cm(-1) at 60 degrees C, IEC = 1.04 mmol g(-1)). Moreover, 70 wt % QPPONF/PVA composite membrane exhibits an excellent peak power density of 791 mW cm(-2) in the H-2/O-2 fuel cell test.