Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Iran.
Faculty of Chemistry, Department of Applied Chemistry, Urmia University, Urmia, Iran.
Sci Rep. 2023 May 22;13(1):8238. doi: 10.1038/s41598-023-34953-8.
Proton exchange membrane fuel cells (PEMFC) have received a lot of interest and use metal-organic frameworks (MOF)/polymer nanocomposite membranes. Zeolite imidazole framework-90 (ZIF-90) was employed as an addition in the sulfonated poly (1, 4-phenylene ether-ether-sulfone) (SPEES) matrix in order to investigate the proton conductivity in a novel nanocomposite membrane made of SPEES/ ZIF. The high porosity, free surface, and presence of the aldehyde group in the ZIF-90 nanostructure have a substantial impact on enhancing the mechanical, chemical, thermal, and proton conductivity capabilities of the SPEES/ZIF-90 nanocomposite membranes. The results indicate that the utilization of SPEES/ZIF-90 nanocomposite membranes with 3wt% ZIF-90 resulted in enhanced proton conductivity of up to 160 mS/cm at 90 °C and 98% relative humidity (RH). This is a significant improvement compared to the SPEES membrane which exhibited a proton conductivity of 55 mS/cm under the same conditions, indicating a 1.9-fold increase in performance. Furthermore, the SPEES/ZIF-90/3 membrane exhibited a remarkable 79% improvement in maximum power density, achieving a value of 0.52 W/cm at 0.5 V and 98% RH, which is 79% higher than that of the pristine SPEES membrane.
质子交换膜燃料电池（PEMFC）受到了广泛的关注，并采用了金属有机骨架（MOF）/聚合物纳米复合材料膜。沸石咪唑酯骨架-90（ZIF-90）被用作磺化聚（1,4-亚苯基醚-醚-砜）（SPEES）基质中的添加剂，以研究由 SPEES/ZIF 制成的新型纳米复合膜中的质子电导率。ZIF-90 纳米结构中的高孔隙率、自由表面和醛基对提高 SPEES/ZIF-90 纳米复合膜的机械、化学、热和质子电导率性能有很大的影响。结果表明，在 SPEES/ZIF-90 纳米复合膜中使用 3wt%的 ZIF-90 可以将质子电导率提高到 90°C 和 98%相对湿度（RH）下的 160 mS/cm。与在相同条件下质子电导率为 55 mS/cm 的 SPEES 膜相比，这是一个显著的提高，表明性能提高了 1.9 倍。此外，SPEES/ZIF-90/3 膜的最大功率密度提高了 79%，在 0.5V 和 98%RH 下达到 0.52 W/cm，比原始 SPEES 膜提高了 79%。
