Fei Xu, Yuyang Han, Kai Huang, Yanting Li, Qinwu Yang, Jianning Ding* and Bencai Lin*,
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引用次数: 0
摘要
通过在主链上引入烷基间隔剂，合成了一系列无醚的含聚芴-共烷基悬垂型哌啶离子（PFDPE-Pi和PFDPH-Pi）。为比较，在相同条件下制备了无烷基间隔的季铵盐聚芴-共三苯基。柔性烷基间隔剂的引入使PFDPE-Pi和PFDPH-Pi膜具有优异的柔韧性、高吸水性和高导电性。值得注意的是，PFDPH-Pi在80°C的2 M KOH中浸泡30天后，电导率仅下降了4%，表明其具有良好的碱性稳定性。添加PFDPH-Pi的H2/O2阴离子交换膜燃料电池的峰值功率密度为698 mW cm-2，显著高于添加pfdp - pi的电池的峰值功率密度484 mW cm-2。该研究为制备综合性能满意的耐用聚芴基阴离子交换膜提供了有效途径，突出了其在燃料电池中的应用潜力。
Poly(fluorene-co-alkyl)-based Polymers Bearing Pendant Piperidinium Cations for Alkaline Anion Exchange Membrane Fuel Cell Applications
A series of ether-free poly(fluorene-co-alkyl) bearing pendant piperidinium cations (PFDPE-Pi and PFDPH-Pi) was synthesized by introducing alkyl spacers into the main chain. For comparison, quaternized poly(fluorene-co-triphenyl) without alkyl spacers was prepared and characterized under the same conditions. The introduction of flexible alkyl spacers imparted excellent flexibility, high water uptake, and high conductivity to the PFDPE-Pi and PFDPH-Pi membranes. Notably, the conductivity of PFDPH-Pi decreased by only 4% after immersion in 2 M KOH at 80 °C for 30 days, indicating its excellent alkaline stability. The H2/O2 anion exchange membrane fuel cell with PFDPH-Pi exhibited a peak power density of 698 mW cm–2, which was significantly higher than that of 484 mW cm–2 observed for the cells with PFTP-Pi. This study provides an effective approach for preparing durable polyfluorene-based anion exchange membranes with satisfactory comprehensive performance, highlighting their potential for fuel cell applications.
期刊介绍：
The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.
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