Stable and Highly Conductive Poly(terphenyl piperidinium)/ZIF-8 Composite Anion Exchange Membranes for Efficient and Durable Water Electrolysis

This study focused on enhancing the performance of anion exchange membranes (AEMs) in water electrolysis applications. Anion exchange membrane water electrolysis (AEMWE) is a crucial technology for hydrogen production, but its performance is largely determined by the key materials of the AEMs. We developed a new filler and incorporated it into poly(terphenyl piperidinium) (PTP) to address the key challenges in AEM properties, such as ion conductivity and long-term stability. The resultant composite membranes exhibited improved ionic conductivity (128.8 mS cm–1, 80 °C), enhanced resistance to swelling (<8%), and excellent alkaline stability (more than 2160 h, 60 °C in 1 M KOH). Additionally, surface modification of the filler enhanced its compatibility with the polymer matrix, thereby preventing the filler from compromising the mechanical properties of the AEMs and promoting long-term stability. Notably, the AEMWE achieved a high water electrolysis performance (2.3 A cm–2 at 2 V, 80 °C) and remarkable durability (1300 h at 0.5 A cm–2, 60 °C). Overall, this research presented a promising strategy for AEM design and applications in hydrogen production through water electrolysis.