Preparation and characterization of imidazolium-functionalized poly (ether sulfone) as anion exchange membrane and ionomer for fuel cell application
Preparation and characterization of imidazolium-functionalized poly (ether sulfone) as anion exchange membrane and ionomer for fuel cell application
复制标题
燃料电池用阴离子交换膜和离聚物咪唑功能化聚醚砜的制备与表征
DOI：
10.1016/j.ijhydene.2013.05.070
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发表时间：
2013-07-26
影响因子：
7.2
通讯作者：
Yi, Baolian
中科院分区：
文献类型：
--
作者：
Lu, Wangting;Shao, Zhi-Gang;Yi, Baolian
用1-烷基咪唑对氯甲基化聚醚砜(PES)进行功能化处理，合成了用于阴离子交换膜燃料电池(AEMFC)的咪唑功能化阴离子交换膜(AEMS)。AEMS的性质可以通过PES的氯甲基化程度来控制。此外，随着咪唑基上烷基长度的增加，AEMS的吸水率、溶胀度和溶解度增加，而氢氧化物电导率下降。通过将AEMS溶解在乙醇和水的混合物中，可以得到IM基阴离子交换离聚体。电化学研究表明，在咪唑功能化的AEI存在下，铂/C对氧还原和氢氧化的催化活性与商业季铵盐离聚体几乎相同。将所制备的AEM和AEI用于组装H-2/O-2 AEMFC，得到的峰值功率密度接近30 mW cm(-2)，开路电位大于1.0V。结果表明，咪唑功能化的AEMS和AEI可能是在AEMFC中应用的候选材料。版权所有(C)2013，氢能源出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
Imidazolium-functionalized anion exchange membranes (AEMs) for anion exchange membrane fuel cells (AEMFCs) were synthesized by functionalization of chloromethylated poly (ether sulfone) (PES) with 1-alkylimidazole. The properties of AEMs can be controlled by the degree of chloromethylation of PES. Moreover, with the increment of the alkyl line length on the imidazolium group, the water uptake, swelling ratio and solubility of AEMs increased, whereas the hydroxide conductivity declined. By dissolving AEMs in the mixture of ethanol and water, IM-based anion exchange ionomers (AEIs) can be obtained. Electrochemical studies revealed that the catalytic activities of Pt/C towards oxygen reduction and hydrogen oxidation in the presence of imidazolium-functionalized AEIs were almost the same with that of commercial quaternary ammonium-based ionomers. The fabricated AEM and AEI were utilized to assemble H-2/O-2 AEMFC, yielding a peak power density of similar to 30 mW cm(-2) with open circuit potential larger than 1.0 V. The results obtained indicate that imidazolium-functionalized AEMs and AEIs may be candidates which are worth further investigation for the application in the AEMFCs. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.