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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Partially fluorinated, multication cross-linked poly(arylene piperidinium) membranes with improved conductivity and reduced swelling for fuel cell application
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论文类型：期刊论文
发表时间：2021-02-02
发表刊物：IONICS
卷号：26
期号：11
页面范围：5617-5627
ISSN号：0947-7047
关键字：Fluorinated, non-ether backbone; Multication cross-link; Anion exchange membrane; Swelling resistance; Conductivity
摘要：As an important component in alkaline membrane fuel cells, anion exchange membrane (AEM) often suffers from the tradeoff between ionic conductivity and chemical/dimensional stability. We herein report a partially fluorinated poly(arylene piperidinium) AEM with multication cross-links, which was synthesized by copolymerizing 1,1,1-trifluoroacetone, N-methyl-4-piperidone, biphenyl, and subsequent cross-linking with N-1, N-6-bis(6-bromohexyl)-N-1, N-1, N-6, N-6-tetramethylhexane-1,6-diammonium bromide. The resultant AEM exhibited an excellent OH- conductivity of 148.7 mS cm(-1) at 80 degrees C (IEC = 2.9 mmol g(-1)) due to the multication structure, which may promote microphase separation to produce wide ion-conducting channels. Compared with those without partial fluorination, the fluorinated AEM showed lower swelling ratio (33% vs. 58% at 80 degrees C). The ionic conductivity of the AEM remained by 85% after it was treated 1700 h in 1 M NaOH at 80 degrees C. In addition, the H-2/O-2 fuel cell assembled with the AEM yielded a peak power density of 208 mW cm(-2) at 60 degrees C. Our work successfully demonstrates the synergistic effect of partially fluorinated backbone and multication cross-linked structure to inhibit membrane swelling while keeping high conductivity; it is beneficial for better balancing AEM conductivity and robustness.