Reinforced poly(fluorenyl-co-terphenyl piperidinium) anion exchange membranes for fuel cells
2022
Wang, Ho Hyun | Hu, Chuan | Park, Jong Hyeong | Kim, Hae Min | Kang, Na Yoon | Bae, Joon Yong | Lee, Won Hee | Chen, Nanjun | Lee, Young Moo
Mechanically tough and durable anion exchange membranes (AEMs) are vital materials for AEM fuel cells (AEMFCs). Here, we report a series of high-performance high density polyethylene (PE)-reinforced in-house AEMs based on poly(fluorenyl-co-terphenyl piperidinium) (PFTP@PE) using EtOH as an assistant co-solvent. We found that EtOH showed low contact angle and interface tension on the PE substrate, which improved the penetration efficiency of polymer solutions in the PE substrate. Specifically, 15% EtOH-assisted PFTP@PE membranes displayed ∼100% visible light transmittance and outstanding tensile strength greater than 120 MPa (along with ∼50% elongation at break) compared to PFTP@PE without EtOH assistance (51% light transmittance and 80 MPa tensile strength). Moreover, the peak power densities of PFTP@PE-based AEMFCs reach 1.7 W cm⁻² in H₂–O₂ and 1.08 W cm⁻² in H₂-air(CO₂ free) at 80 °C. The present work provides a facile and scalable method to fabricate high-performance reinforced AEMs.
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