Rico-Martínez Sandra, Cho Hyeon Keun, Hu Chuan, Lee Young Jun, Miguel Jesús A, Lozano Angel E, Lee Young Moo
IU CINQUIMA, Department of Inorganic Chemistry, Faculty of Science, University of Valladolid, 47011, Valladolid, Spain.
Department of Energy Engineering, Hanyang University, Seoul, 04763, South Korea.
ChemSusChem. 2025 Feb 1;18(3):e202401659. doi: 10.1002/cssc.202401659. Epub 2024 Oct 22.
Sustainable hydrogen production is focused on anion exchange membrane (AEM) water electrolyzers (AEMWEs), which still require more development to achieve high performance and durability. Here, we propose a novel class of porous organic polymers (POPs) as durable solid-ionomers for AEMWEs, which was prepared by reacting the 4-methylpiperidone with trifunctional or a mixture of trifunctional:difunctional aromatic monomers (in a 2 : 3 mol ratio). The resulting POP ionomers exhibited exceptional electrochemical properties and remarkable alkaline stability. Particularly noteworthy are the corresponding AEMWEs, which showed an outstanding current density of 13.4 A cm at 2.0 V under 80 °C in 1 M KOH solution, which is the highest performance reported in the particulate-ionomers AEMWE state of the art. Moreover, they demonstrated durability at a current density of 0.5 A cm for over 500 h with a voltage decay rate of 120 μV h. This work offers valuable perspectives on the designing of robust and high-performance solid-state ionomers through low-cost electrophilic aromatic substitution reactions for high-performance energy conversion devices.
可持续制氢聚焦于阴离子交换膜（AEM）水电解槽（AEMWEs），而要实现高性能和耐久性，其仍需更多发展。在此，我们提出一类新型多孔有机聚合物（POPs）作为AEMWEs的耐用固体离聚物，它是通过使4-甲基哌啶酮与三官能团或三官能团与双官能团芳香族单体的混合物（摩尔比为2∶3）反应制备而成。所得的POP离聚物展现出优异的电化学性能和显著的碱性稳定性。特别值得注意的是相应的AEMWEs，在80℃、1M KOH溶液中，其在2.0V时表现出13.4A cm的出色电流密度，这是颗粒离聚物AEMWEs现有技术中报道的最高性能。此外，它们在0.5A cm的电流密度下展现出超过500小时的耐久性，电压衰减率为120μV h。这项工作通过低成本亲电芳香取代反应为高性能能量转换装置设计坚固且高性能的固态离聚物提供了有价值的观点。
