Wang Kaiqi, Zhang Zhenpeng, Li Su, Zhang Haibo, Yue Nailin, Pang Jinhui, Jiang Zhenhua
Laboratory of High Performance Plastics (Jilin University), Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.
Shenyang Rubber Research & Design Institute Company Limited, Shenyang 110021, People's Republic of China.
ACS Appl Mater Interfaces. 2021 May 26;13(20):23547-23557. doi: 10.1021/acsami.1c00889. Epub 2021 May 12.
To obtain anion exchange membranes with both high ionic conductivity and good dimensional stability, a series of side-chain-type poly(arylene ether sulfone)s (PAES-QDTPM-) were designed and synthesized. Quaternary ammonium (QA) groups were densely aggregated and grafted onto the main chain via flexible hydrophobic spacers. Well-defined microphase separation was confirmed by small-angle X-ray scattering. PAES-QDTPM-0.30 exhibited reasonably high conductivity (39.4 mS cm at 20 °C and 76.1 mS cm at 80 °C) and excellent dimensional stability at 80 °C (11.9% in length, 11.2% in thickness) due to the concentration of ion clusters and the side-chain-type structure. All membranes maintained over 82% of the conductivity after alkali treatment for 14 days. In the H/O fuel cell performance test, the maximum power density of PAES-QDTPM-0.30 at 60 °C was 225.8 mW cm.
为了获得具有高离子电导率和良好尺寸稳定性的阴离子交换膜，设计并合成了一系列侧链型聚（亚芳基醚砜）（PAES-QDTPM-）。季铵（QA）基团通过柔性疏水间隔基密集聚集并接枝到主链上。通过小角X射线散射证实了明确的微相分离。由于离子簇的聚集和侧链型结构，PAES-QDTPM-0.30在20°C时表现出相当高的电导率（39.4 mS/cm），在80°C时为76.1 mS/cm，并且在80°C时具有出色的尺寸稳定性（长度为11.9%，厚度为11.2%）。所有膜在碱处理14天后仍保持超过82%的电导率。在氢/氧燃料电池性能测试中，PAES-QDTPM-0.30在60°C时的最大功率密度为225.8 mW/cm²。
