部分
芳烯
离子交换
化学
膜
铵
乙醚
离子电导率
离子键合
高分子化学
燃料电池
化学工程
电导率
离子
化学稳定性
组合化学
有机化学
电极
物理化学
工程类
烷基
电解质
芳基
生物化学
作者
Chenxiao Lin,Demei Yu,Jixia Wang,Yan Zhang,Dong Xie,Faliang Cheng,Shiguo Zhang
标识
DOI:10.1016/j.ijhydene.2019.08.092
摘要
Anion exchange membrane (AEM) fuel cells have received significant attention due to their low fuel permeability and the use of non-platinum catalysts. However, the development of AEMs with robust chemical stability and high conductivity is still a great challenge. Herein, we prepare a new type of partially fluorinated backbone bearing pendent N-spirocyclic quaternary ammonium (QA) cations via a facile Williamson reaction, which displays great potential for fuel cells. The integration of the two substructures (a fluorinated moiety into a polymer backbone and a pendent cation structure) is beneficial for the fabrication of a well-defined micro-phase separation structure, thereby facilitating the construction of a highly-efficient ion transporting pathway. Correspondingly, the resulting AEM (PAENQA-1.0), despite its a relatively low ionic exchange capacity (0.93 meq g−1) demonstrates a conductivity of 63.1 mS cm−1 (80 °C). Meanwhile, the constrained ring conformation of N-spirocyclic QA results in improved stability of the AEMs.
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