膜科学与技术

高耐碱性交联型聚苯醚阴离子交换膜的制备

作者：杨谦，张瑜兰，张秋根，朱爱梅，刘庆林

单位：厦门大学化学化工学院，厦门 361000

关键词：燃料电池；交联型；耐碱性；阴离子交换膜

出版年,卷(期):页码： 2020,40(1):16-22

摘要：

以聚苯醚(PPO)为主链， N,N-二甲基己胺(DMHA)，N,N-二异丙基乙胺(DIEA)和三乙胺(TEA)为季铵化试剂，N,N,N',N'-四甲基-1,6-己二胺为交联剂制备了一系列交联型阴离子交换膜(AEMs)，并对交联膜物理和电化学性能进行了表征与测试。结果表明膜具有明显的微相分离结构、高的离子电导率、优异的尺寸稳定性和化学稳定性。其中接枝N,N-二异丙基乙胺的膜(c-PPO-DIEA)离子电导率在80 °C下可达到72.3 mS/cm。在1 M NaOH中经480 h的耐碱性测试发现，膜c-PPO-DIEA的离子电导率能够保留80%以上，表现出良好的耐碱性。将该膜组装成单电池测试，开路电压为0.983 V，在80 oC下电流密度200 mA/cm2时其功率密度达到89 mW/cm2。

To improve the comprehensive performance of anion exchange membranes (AEMs) for fuel cells, a seires of AEMs with different functional groups was designed and prepared. Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) was used as backbone, and 1,6-bis-(dimethylamino)-hexane (TMHDA) was used as crosslinker. Then structures and electrochemical performance of prepared AEMs were investigated. The results show that all AEMs have good hydroxide conductivity, satisfactory dimensional stability and high chemical stability. Among them, the c-PPO-DIEA membrane has the highest ionic conductivity (72.3 mS/cm, 80 °C). Moreover, ionic conductivity of this kind of AEM can still remain 80.2% after immersing in alkaline solution for 20 days, showing alkaline resistance. In conclusion, the c-PPO-DIEA AEM shows a great potential for application in fuel cells.

第一作者简介：杨谦(1989-)，男，甘肃省西和县人，博士生，从事功能膜材料的制备通讯作者简介：刘庆林，Email：qlliu@xmu.edu.cn

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