Abstract A new sulfonated aromatic diamine monomer containing nitrogen heterocycles was synthesized and employed to prepare a novel sulfonated polyimide (SPI). To develop proton exchange membranes, new nanocomposite blend membranes consist of the prepared SPI and polybenzimidazole (PBI) were fabricated with incorporation of SrCe0.9Yb0.1O3-δ (SCYb) doped-perovskite nanoparticles with a solution-casting method. The goal of this work is to study the effect of SPI and SCYb doped-perovskite nanoparticles on the important parameters of the PBI membrane specially proton conductivity and fuel cell performance. The proton conductivity and phosphoric acid doping level of the PBI-SPI-SCYb nanocomposite blend membranes improved due to an interaction of –SO3H group and thiazole rings of SPI and N–H groups of PBI in the oxygen vacancies of SCYb doped-perovskite nanoparticles. Substitution of Ce4+ by Yb3+ in the SCYb doped-perovskite nanoparticles produce oxygen vacancies and decrease the columbic repulsion between protons and positive ions. Furthermore at highest phosphoric acid doping level of 14 mol phosphoric acid per monomer unit, the nanocomposite blend membranes displayed proton conductivity of 131 mS/cm at 180 °C and 8% relative humidity. The increase in power density from 0.31 W/cm2 in PBI-SPI blend membranes (SPI/PBI: 25 wt%) to 0.59 W/cm2 in PBI-SPI-SCYb nanocomposite blend membranes (SPI/PBI: 25 wt% and 7 wt% of SCYb) was achieved at 0.5 V, 8% RH and 180 °C, which demonstrates that these developed nanocomposite blend membranes have a high potential to be regarded as the most promising candidates for high-temperature fuel cell with improved proton conductivity.

中文翻译：

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基于 PBI/磺化聚酰亚胺和掺杂钙钛矿纳米粒子的高温膜，用于 PEM 燃料电池

摘要 合成了一种含氮杂环的磺化芳族二胺新单体，并用于制备新型磺化聚酰亚胺(SPI)。为了开发质子交换膜，通过溶液浇铸法掺入 SrCe0.9Yb0.1O3-δ (SCYb) 掺杂钙钛矿纳米粒子，制造了由制备的 SPI 和聚苯并咪唑 (PBI) 组成的新型纳米复合混合膜。这项工作的目的是研究 SPI 和 SCYb 掺杂的钙钛矿纳米粒子对 PBI 膜的重要参数，特别是质子电导率和燃料电池性能的影响。由于-SO3H 基团和SPI 的噻唑环和PBI 的N-H 基团在SCYb 掺杂的钙钛矿纳米粒子的氧空位中的相互作用，PBI-SPI-SCYb 纳米复合材料共混膜的质子电导率和磷酸掺杂水平得到改善。在 SCYb 掺杂的钙钛矿纳米粒子中，Ce4+ 被 Yb3+ 取代会产生氧空位并降低质子和正离子之间的库伦排斥。此外，在每个单体单元 14 mol 磷酸的最高磷酸掺杂水平下，纳米复合材料混合膜在 180 °C 和 8% 相对湿度下显示出 131 mS/cm 的质子电导率。功率密度从 PBI-SPI 混合膜（SPI/PBI：25 wt%）的 0.31 W/cm2 增加到 PBI-SPI-SCYb 纳米复合膜（SPI/PBI：25 wt% 和 7 wt%）的 0.59 W/cm2 SCYb) 的百分比在 0.5 V 时达到，