用于阴离子交换膜燃料电池的支化聚（芳基哌啶鎓）膜
Branched Poly(Aryl Piperidinium) Membranes for Anion-Exchange Membrane Fuel Cells.
作者信息
Wu Xingyu, Chen Nanjun, Klok Harm-Anton, Lee Young Moo, Hu Xile
机构信息
Laboratory of Inorganic Synthesis and Catalysis (LSCI), Institute of Chemical Sciences and Engineering (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), BCH 3305, Lausanne, 1015, Switzerland.
Department of Energy Engineering, College of Engineering, Hanyang University, Seoul, 04763 (Republic of, Korea.
出版信息
Angew Chem Int Ed Engl. 2022 Feb 7;61(7):e202114892. doi: 10.1002/anie.202114892. Epub 2021 Dec 27.
Anion-exchange membrane fuel cells (AEMFCs) are a promising, next-generation fuel cell technology. AEMFCs require highly conductive and robust anion-exchange membranes (AEMs), which are challenging to develop due to the tradeoff between conductivity and water uptake. Here we report a method to prepare high-molecular-weight branched poly(aryl piperidinium) AEMs. We show that branching reduces water uptake, leading to improved dimensional stability. The optimized membrane, b-PTP-2.5, exhibits simultaneously high OH conductivity (>145 mS cm at 80 °C), high mechanical strength and dimensional stability, good processability, and excellent alkaline stability (>1500 h) in 1 M KOH at 80 °C. AEMFCs based on b-PTP-2.5 reached peak power densities of 2.3 W cm in H -O and 1.3 W cm in H -air at 80 °C. The AEMFCs can run stably under a constant current of 0.2 A cm over 500 h, during which the b-PTP-2.5 membrane remains stable.
阴离子交换膜燃料电池（AEMFCs）是一种很有前景的下一代燃料电池技术。AEMFCs需要高导电性和坚固的阴离子交换膜（AEMs），由于导电性和吸水性之间的权衡，开发这种膜具有挑战性。在此，我们报告一种制备高分子量支化聚（芳基哌啶鎓）AEMs的方法。我们表明，支化减少了吸水性，从而提高了尺寸稳定性。优化后的膜b-PTP-2.5在80°C时同时表现出高OH电导率（>145 mS cm）、高机械强度和尺寸稳定性、良好的加工性能以及在80°C的1 M KOH中优异的碱性稳定性（>1500 h）。基于b-PTP-2.5的AEMFCs在80°C的H₂-O₂中达到了2.3 W cm²的峰值功率密度，在H₂-空气中达到了1.3 W cm²。该AEMFCs可以在0.2 A cm²的恒定电流下稳定运行超过500 h，在此期间b-PTP-2.5膜保持稳定。
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