主链型聚(芳基哌啶)阴离子交换膜的制备及燃料电池性能研究

Preparation of main chain poly(arylpiperidine)anion exchange membrane and study on its fuel cell performance

通过超酸催化合成2种聚芳基哌啶型聚合物(QAPTP),然后进行季铵化和离子交换制备出氢氧根形式的阴离子交换膜用于碱性燃料电池。相比于QAPTP-DP-30膜,QAPTP-15-DP-30膜的吸水率明显降低,因此具有更高的机械性能和耐碱稳定性,其拉伸强度在室温下为40.4 MPa;在80℃的1 mol/L NaOH中浸泡700 h,氢氧根离子传导率可保持80%以上。在1306 mA/cm^(-1)的电流密度下,膜QAPTP-15-DP-30的最大功率密度为522 mW/cm^(-1)。结果表明,QAPTP阴离子交换膜在碱性燃料电池领域具有广阔的应用前景。

Two kinds of poly(arylpiperidine)polymers are synthesized via superacid catalysis,then quaternized and ion-exchanged to successfully prepare hydroxide-type anion exchange membranes(AEMs)for alkaline fuel cells.Compared with QAPTP-DP-30 membrane,QAPTP-15-DP-30 membrane has a significant lower water uptake,so it shows higher mechanical properties and alkaline stability.Its tensile strength is 40.4 MPa at room temperature;After it has been soaked in 1 mol·L^(-1)NaOH at 80℃for 700 h,the hydroxyl ion conductivity can maintain more than 80%.At a current density of 1306 mA·cm^(-1),the maximum power density of QAPTP-15-DP-30 is 522 mW·cm^(-1).Results show that QAPTP AEMs have broad application prospects in the field of alkaline fuel cells.