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Fabricating a MOF Material with Polybenzimidazole into an Efficient Proton Exchange Membrane
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-07-10 00:00:00 , DOI: 10.1021/acsaem.0c01322 Subhabrata Mukhopadhyay 1 , Anupam Das 1 , Tushar Jana 1 , Samar K. Das 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-07-10 00:00:00 , DOI: 10.1021/acsaem.0c01322 Subhabrata Mukhopadhyay 1 , Anupam Das 1 , Tushar Jana 1 , Samar K. Das 1
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Metal organic frameworks (MOFs) have received considerable importance as proton conducting materials in recent times. However, most of the MOFs lack the ability to form film, which limits their application. In the present work, polybenzimidazole (PBI) composite membranes have been prepared by loading post synthetically modified (PSM) UiO-66-NH2 MOFs, denoted as PSM 1 and PSM 2 into an aryl ether-type polybenzimidazole (OPBI) polymer. The pristine OPBI, and MOF nanofiller loaded membranes were doped with phosphoric acid (PA) to prepare proton exchange membranes (PEMs). Use of thermally stable, hydrophilic MOFs resulted in enhanced proton conductivity, higher PA retention capacity, and increased stability against oxidative degradation for the composite membrane than the pristine OPBI polymer. The proton conductivities of the composite membranes (0.29 S cm–1 for PSM 1-10% and 0.308 S cm–1 for PSM 2-10% membranes at 160 °C, under anhydrous environment) were notably higher than the conductivities of the constituents and also higher than most of the MOF based polymer supported membranes. To the best of our knowledge, the PA doped PSM 2 loaded composite membrane shows the highest proton conductivity at 160 °C among all MOF based composite membranes. Extensive interfacial H-bonding plays the most crucial role behind the enhanced proton conductivities of the PA doped MOF containing polymer membranes reported here. This work clearly demonstrates the benefits of using rationally designed PSM 1 and PSM 2 MOFs as nanofiller to prepare OPBI supported membranes that can perform excellent proton conduction in a wide temperature range spanning up to 160 °C. This provides a generalized approach toward achieving an efficient proton conducting membrane for use in fuel cells.
中文翻译：
用聚苯并咪唑将MOF材料制备成高效的质子交换膜
近年来，金属有机骨架（MOF）作为质子传导材料已变得相当重要。但是，大多数MOF缺乏成膜能力，这限制了它们的应用。在目前的工作中，通过将合成后修饰的（PSM）UiO-66-NH 2 MOF（表示为PSM 1和PSM 2）加载到芳基醚型聚苯并咪唑（OPBI）聚合物中来制备聚苯并咪唑（PBI）复合膜。原始的OPBI，然后用磷酸（PA）掺杂MOF纳米填料，制备质子交换膜（PEMs）。与原始OPBI聚合物相比，使用热稳定的亲水性MOF可以提高质子传导性，提高PA保留能力并提高复合膜抗氧化降解的稳定性。所述复合膜的质子传导（0.29小号厘米-1为PSM 1 -10％和0.308小号厘米-1为PSM 2层在160℃-10％的膜，无水环境下）均显着高于各组分的电导率并且也高于大多数基于MOF的聚合物负载膜。据我们所知，PA掺杂了PSM 2在所有基于MOF的复合膜中，负载的复合膜在160°C时表现出最高的质子传导率。广泛的界面H键在此处报道的含PA掺杂的MOF的聚合物膜的质子传导性增强之后，起着最关键的作用。这项工作清楚地证明了使用合理设计的PSM 1和PSM 2 MOF作为纳米填料来制备OPBI支撑的膜的好处，该膜可以在高达160°C的宽温度范围内执行出色的质子传导。这为实现用于燃料电池的有效质子传导膜提供了通用的方法。
更新日期：2020-07-10
中文翻译：
用聚苯并咪唑将MOF材料制备成高效的质子交换膜
近年来，金属有机骨架（MOF）作为质子传导材料已变得相当重要。但是，大多数MOF缺乏成膜能力，这限制了它们的应用。在目前的工作中，通过将合成后修饰的（PSM）UiO-66-NH 2 MOF（表示为PSM 1和PSM 2）加载到芳基醚型聚苯并咪唑（OPBI）聚合物中来制备聚苯并咪唑（PBI）复合膜。原始的OPBI，然后用磷酸（PA）掺杂MOF纳米填料，制备质子交换膜（PEMs）。与原始OPBI聚合物相比，使用热稳定的亲水性MOF可以提高质子传导性，提高PA保留能力并提高复合膜抗氧化降解的稳定性。所述复合膜的质子传导（0.29小号厘米-1为PSM 1 -10％和0.308小号厘米-1为PSM 2层在160℃-10％的膜，无水环境下）均显着高于各组分的电导率并且也高于大多数基于MOF的聚合物负载膜。据我们所知，PA掺杂了PSM 2在所有基于MOF的复合膜中，负载的复合膜在160°C时表现出最高的质子传导率。广泛的界面H键在此处报道的含PA掺杂的MOF的聚合物膜的质子传导性增强之后，起着最关键的作用。这项工作清楚地证明了使用合理设计的PSM 1和PSM 2 MOF作为纳米填料来制备OPBI支撑的膜的好处，该膜可以在高达160°C的宽温度范围内执行出色的质子传导。这为实现用于燃料电池的有效质子传导膜提供了通用的方法。
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