堆积
共轭体系
密度泛函理论
电导率
离子
材料科学
小角X射线散射
透射电子显微镜
膜
离子交换
散射
化学
物理化学
计算化学
纳米技术
聚合物
有机化学
复合材料
物理
光学
生物化学
作者
Fan Zhang,Yang Zhang,Lixuan Sun,Chengpeng Wei,Huaqing Zhang,Liang Wu,Xiaolin Ge,Tongwen Xu
标识
DOI:10.1002/anie.202215017
摘要
Abstract The McMurry coupling is a facile, gentle and low‐cost chemical reaction for synthesizing. Here, for the first time, we employed the McMurry coupling reaction to prepare π‐conjugated anion exchange membranes (AEMs). The inter‐chain π‐π stacking between adjacent benzene rings induces directional self‐assembly aggregation and enables highly ordered ion‐conductive channels. The resulting structure was characterized through UV/VIS spectrum, X‐ray diffraction (XRD) pattern, small‐angle X‐ray scattering (SAXS), transmission electron microscopy (TEM) and density functional theory (DFT) calculations, leading to high OH − conductivity of 135.5 mS cm −1 at 80 °C. Furthermore, the double bonds in the π‐conjugated system also trigger in situ self‐crosslinking of the AEMs to enhance dimensional and alkaline stability. Benefiting from this advantage, the as‐obtained Cr‐QPPV‐2.51 AEM exhibits superior alkaline stability (95 % conductivity retention after 3000 hrs in 1 M KOH at 80 °C) and high mechanical strength of 34.8 MPa. Moreover, the fuel cell using Cr‐QPPV‐2.51 shows a maximum peak power density of 1.27 W cm −2 at 80 °C.
科研通智能强力驱动
Strongly Powered by AbleSci AI