Imidazolium-Functionalized Poly(arylene ether sulfone) Anion-Exchange Membranes Densely Grafted with Flexible Side Chains for Fuel Cells
Imidazolium-Functionalized Poly(arylene ether sulfone) Anion-Exchange Membranes Densely Grafted with Flexible Side Chains for Fuel Cells
复制标题
用于燃料电池的密集接枝柔性侧链的咪唑功能化聚（亚芳基醚砜）阴离子交换膜
DOI：
10.1021/acsami.6b07711
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发表时间：
2016-09-28
影响因子：
9.5
通讯作者：
Liu, Qing Lin
中科院分区：
文献类型：
--
作者：
Guo, Dong;Lai, Ao Nan;Liu, Qing Lin
以优化阴离子交换膜性能为目的，合成了一系列咪唑功能化的聚芳醚砜，其脂肪族侧链长且分布密集。由所合成的聚合物制成的膜是坚固的、透明的，并且具有微相分离能力。的离子交换容量（IEC），氢氧化物的电导率，吸水率，热稳定性，和耐碱性的AEM燃料电池应用进行了详细的评估。使用原子力显微镜和小角X射线散射的形态学观察表明，高局部密度型和侧链型架构的组合诱导在AEMs中的区别纳米相分离。所制备的膜在有效的水管理和离子导电性方面优于传统的主链聚合物。典型地，在80 ° C下，电导率和IEC分别在57.3 - 112.5 mS cm（-1）和1.35 - 1.84 mequiv g（-1）的范围内。此外，该膜表现出良好的热稳定性和碱性稳定性，并且在250.1 mA cm（-2）的电流密度下达到114.5 mW cm（-2）的峰值功率密度。因此，本发明的聚合物含有成簇的柔性侧链脂肪族咪唑鎓有望成为用于燃料电池的有吸引力的AEM材料。
With the intention of optimizing the performance of anion exchange membranes (AEMs), a set of imidazolium-functionalized poly(arylene ether sulfone)s with densely distributed long flexible aliphatic Side chains were synthesized. The membranes made from the as-synthesized polymers are robust, transparent, and endowed with microphase segregation capability. The ionic exchange capacity (IEC), hydroxide conductivity, water uptake, thermal stability, and alkaline resistance of the AEMs were evaluated in detail for fuel cell applications. Morphological observation with the use of atomic force microscopy and small-angle X-ray scattering reveals that the combination of high-local-density-type and side-chain-type architectures induces distinguished nanophase separation in the AEMs. The as:prepared membranes have advantages in effective water management and ionic conductivity over traditional main-chain polymers. Typically, the conductivity and IEC were in the ranges of 57.3-112.5 mS cm(-1) and 1.35-1.84 mequiv g(-1) at 80 degrees C, respectively. Furthermore, the membranes exhibit good thermal and alkaline stability and achieve a peak power density of 114.5 mW cm(-2) at a current density of 250.1 mA cm(-2). Therefore, the present polymers containing clustered flexible pendent aliphatic imidazolium promise to be attractive AEM materials for fuel cells.