Comb-shaped ether-free poly(biphenyl indole) based alkaline membrane
Comb-shaped ether-free poly(biphenyl indole) based alkaline membrane
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DOI：
10.1016/j.memsci.2019.117216
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发表时间：
2019-10
影响因子：
9.5
通讯作者：
Kaifeng Wang;Li Gao;Jiafei Liu;Xiangdong Su;Xiaoming Yan;Yan Dai;Xiaobin Jiang;Xuemei Wu;G. He
中科院分区：
文献类型：
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作者：
Kaifeng Wang;Li Gao;Jiafei Liu;Xiangdong Su;Xiaoming Yan;Yan Dai;Xiaobin Jiang;Xuemei Wu;G. He
燃料电池和水电解需要高导电性和耐碱性的碱性膜。本文采用超强酸催化法合成了无醚型聚联苯吲哚（PBN）。然后通过1-溴己基-N-甲基哌啶鎓与1-溴己烷的缩合反应制备了梳状哌啶鎓功能化PBN（PBN-Pip）膜。梳状长侧链有利于形成宽而连通的离子转运通道。PBN-Pip膜在80 °C下的电导率高达108 mS cm− 1。无醚主链和己基间隔基赋予膜优异的稳定性。在80 °C下浸入1 M KOH中1000 h后，未观察到降解。具有该膜的单电池在80 °C下表现出1.02 V的开路电压和404 mW cm-2的峰值能量密度。电池耐久性测试120 h后，电池的欧姆电阻和膜的化学结构均无变化。这些都表明梳状PBN膜是很有前途的。
High-conductive and alkali-resistant alkaline membranes are needed for fuel cells and water electrolysis. In this work, the ether-free poly(biphenyl indole) (PBN) was synthesized by the means of super acid catalysis. Then comb-shaped piperidinium-functionalized PBN (PBN-Pip) membranes were prepared by the incorporations of 1-bromohexyl-N-methylpiperidinium and 1-bromohexane. The comb-shaped long side chains facilitated the formation of wide and connected ion transport channels. The PBN-Pip membrane possessed the conductivity of as high as 108 mS cm−1at 80 °C. The ether-free backbone and the hexyl spacers endowed the membrane with excellent stability. No degradation can be observed after immersion in 1 M KOH at 80 °C for 1000 h. The single cell with this membrane exhibited the open circuit voltage of 1.02 V and the peak energy density of 404 mW cm−2at 80 °C. After the cell durability test for 120 h, the ohmic resistance of the cell and the chemical structure of the membrane both had no changes. All these suggest that the comb-shaped PBN membrane is very promising.