Wang Jia Jun, Gao Wei Ting, Choo Yvonne Shuen Lann, Cai Zhi Hong, Zhang Qiu Gen, Zhu Ai Mei, Liu Qing Lin
Department of Chemical & Biochemical Engineering, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, The College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
Department of Chemical & Biochemical Engineering, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, The College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China.
J Colloid Interface Sci. 2023 Jan;629(Pt A):377-387. doi: 10.1016/j.jcis.2022.08.183. Epub 2022 Sep 5.
Poly(aryl piperidinium) (PAP) anion exchange membranes (AEMs) furnish an important avenue for the commercialization of anion exchange membrane fuel cells (AEMFCs), but their ionic conductivity and alkali resistance still need to be improved. Here, we report the synthesis of PAP AEMs with a branched structure by the acid-catalyzed reaction and compare them with the main-chain AEMs. The experimental results show that the branched AEMs have higher OH conductivity and alkaline resistance than the poly(terphenyl piperidine) (PTPQ1) AEM. The alkaline stability and OH conductivity of the AEMs were further improved by a flexible multi-cation crosslinker. The results show that the branched poly(p-terphenyl triphenylmethane 1-methyl piperidine) membrane crosslinked by multi-cation (PTTPQ4-40) shows an excellent OH conductivity (155.3 mS cm) at 80 °C. The OH conductivity of the PTTPQ4-40 membrane was maintained at 92.1% after soaking in 2 M NaOH for 1080 h at 80 °C. In addition, the peak power density (PPD) of the crosslinked PTTPQ4-40 membrane can reach 656.7 mW cm. Compared to the PTPQ1 AEM, the PPD of the crosslinked PTTPQ4-40 AEM is increased by 38.6% in H-O. All of the results confirm that the PTTPQ4-40 AEM has excellent fuel cell application prospects.
聚（芳基哌啶鎓）（PAP）阴离子交换膜（AEMs）为阴离子交换膜燃料电池（AEMFCs）的商业化提供了一条重要途径，但其离子电导率和耐碱性仍有待提高。在此，我们报道了通过酸催化反应合成具有支链结构的PAP AEMs，并将其与主链AEMs进行比较。实验结果表明，支链AEMs比聚（三联苯哌啶）（PTPQ1）AEM具有更高的OH电导率和耐碱性。通过柔性多阳离子交联剂进一步提高了AEMs的碱性稳定性和OH电导率。结果表明，由多阳离子交联的支链聚（对三联苯三苯甲烷1-甲基哌啶）膜（PTTPQ4-40）在80℃时表现出优异的OH电导率（155.3 mS/cm）。PTTPQ4-40膜在80℃下于2 M NaOH中浸泡1080 h后，OH电导率保持在92.1%。此外，交联的PTTPQ4-40膜的峰值功率密度（PPD）可达656.7 mW/cm²。与PTPQ1 AEM相比，交联的PTTPQ4-40 AEM在H-O中的PPD提高了38.6%。所有结果证实，PTTPQ4-40 AEM具有优异的燃料电池应用前景。
