Side-chain-type phenolphthalein-based poly(arylene ether sulfone nitrile)s anion exchange membrane for fuel cells
Side-chain-type phenolphthalein-based poly(arylene ether sulfone nitrile)s anion exchange membrane for fuel cells
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燃料电池用侧链型酚酞基聚芳醚砜腈阴离子交换膜
DOI：
10.1016/j.memsci.2015.12.044
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发表时间：
2016-03-15
影响因子：
9.5
通讯作者：
Liu, Qing Lin
中科院分区：
文献类型：
--
作者：
Lai, Ao Nan;Zhuo, Yi Zhi;Liu, Qing Lin
合成了一系列侧链含咪唑基团的酚酞基聚芳醚砜腈，用于制备碱性燃料电池用阴离子交换膜。强极性腈基团被引入到聚合物主链中，目的是改善AEM的尺寸稳定性。改变腈基的含量以研究腈基对AEM的形态和性能的影响。由于咪唑基团位于cardo侧链上，所有的AEMs都具有明确的微相分离结构。此外，随着腈基含量的增加，咪唑鎓基团倾向于聚集，导致在AEM中形成更大和更互连的离子域。离子电导率在2.21-8.14 × 10 ~（-2）S·cm ~（-1）范围内随腈基含量和温度的增加而增加。AEM显示出极好的电导率与IEC的比率或在60 ° C下的溶胀率，良好的机械性能以及热稳定性和碱稳定性。使用所制备的AEM的单个H-2/O-2燃料电池在60 ℃下显示出0.95 V的开路电压和50.6 mW cm-2的峰值功率密度。(C)2015 Elsevier B. V.版权所有。
A series of phenolphthalein-based poly(arylene ether sulfone nitrile)s containing imidazolium groups on the side chains was synthesized to prepare anion exchange membranes (AEMs) for alkaline fuel cells. Strong polar nitrile groups were introduced into the polymer backbone with the intention of improving the dimensional stability of the AEMs. The content of nitrile groups was varied to study the effect of nitrile groups on the morphology and properties of the AEMs. With imidazolium groups locating on the cardo side chains, all the AEMs exhibited well-defined microphase-separated structures. Furthermore, the imidazolium groups tend to aggregate with increasing the nitrile group content resulting in the formation of larger and more interconnected ionic domains in the AEMs. The ionic conductivity in the range of 2.21-8.14 x 10(-2) S cm(-1) increased with increasing the nitrile group content and temperature. The AEMs showed superb ratios of conductivity to IEC or swelling ratio at 60 degrees C, good mechanical properties, and thermal and alkaline stability. A single H-2/O-2 fuel cell using the as-prepared AEMs showed an open circuit voltage of 0.95 V and a peak power density of 50.6 mW cm(-2) at 60 degrees C. (C) 2015 Elsevier B.V. All rights reserved.