近日，西湖大学孙立成团队报道了可扩展超酸还原合成水电解用超稳定阴离子交换膜。2026年6月24日，《科学通报》杂志发表了这一成果。

通过阴离子交换膜水电解（AEM-WE）进行绿氢生产，有望实现具有成本效益的脱碳，但受限于化学不稳定的AEM以及聚合过程中超酸的过量使用，其耐久性和可扩展性面临挑战。

研究组报道了一种聚（芳基甲基奎宁环鎓）（PAMQ），其采用醛官能化奎宁环单体，通过超酸减量的多羟基烷基化方法合成。该策略相较于基于酮的体系，将三氟甲磺酸（TFSA）消耗量减少了62.5%，同时引入了具有空间保护的奎宁环鎓阳离子，能够抵抗β-H消除和亲核取代反应。关键在于，这种简化的合成路线降低了超酸参与聚合反应在放大过程中的风险，实现了中试规模生产和卷对卷膜制造。PAMQ达到了基准氢氧根电导率（90 °C时为170 mS cm^-1），同时具有低溶胀率（13.16%）和优异的碱稳定性，在1 mol L^-1 KOH（80 °C）中经过10,000小时后几乎无明显降解，指数拟合表明其10%的性能衰减发生在十年尺度上。

在完全不含铂族金属的AEM-WE中，PAMQ在2.0 V电压下实现了7.70 A cm^-2的电流密度，并在1 A cm^-2（80 °C）下稳定运行超过2500小时，衰减率仅为12.97 μV h^-1。PAMQ的性能和稳定性在千瓦级电堆中得到了验证，展现了基于PAMQ的AEM在推动可持续氢经济变革中的巨大潜力。

附：英文原文

Title: Scalable superacid-reduced synthesis of ultrastable anion exchange membrane (PAMQ) for water electrolysis

Author: anonymous

Issue&Volume: 2026/06/24

Abstract: Green hydrogen production via anion exchange membrane water electrolysis (AEM-WE) promises cost-effective decarbonization, but faces durability and scalability constraints from chemically unstable AEM and the excessive use of superacid in polymerization. Here, we report a poly(aryl methylquinuclidinium) (PAMQ) synthesized via a superacid-reduced polyhydroxyalkylation approach employing aldehyde-functionalized quinuclidine monomers. This strategy reduces trifluoromethanesulfonic acid (TFSA) consumption by 62.5% versus ketone-based systems, while integrating sterically protected quinuclidinium cations that resist β-H elimination and nucleophilic substitution. Crucially, streamlined synthesis mitigates the risks of superacid polymer reactions during scale-up, enabling pilot-scale production and roll-to-roll membrane fabrication. PAMQ achieves benchmark hydroxide conductivity (170 mS cm1 at 90 °C) with a low swelling ratio (13.16%) and exceptional alkaline stability, showing negligible degradation after 10,000 h in 1 mol L1 KOH (80 °C), and an exponential fit indicates a 10% decay occurs over a decade. In fully non-platinum group metal AEM-WE, it achieved 7.70 A cm2 at 2.0 V, operating stably for over 2500 h at 1 A cm2 (80 °C) with a minor fading rate of 12.97 μV h1. The performance and stability of PAMQ were validated at a kilowatt-level stack, demonstrating the transformative potential of PAMQ-based AEMs to advance the sustainable hydrogen economy.

DOI: 10.1016/j.scib.2026.06.048

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927326007127